Paul Lillis

Biography

Paul Lillis is a petroleum geochemist with the Central Energy Resources Science Center of the U.S. Geological Survey (USGS) in Denver, Colorado. He received a B.A. in geology from San Jose State University, an M.S. in geology from San Diego State University, and a Ph.D. in geochemistry from Colorado School of Mines. He was a petroleum exploration geologist with Atlantic Richfield for eight years (1978 to 1986) in Colorado, California, and Texas, and has been with the USGS in Denver since 1987. His research focuses on the application of petroleum and source-rock geochemistry to identifying, characterizing, and mapping petroleum systems.

 

Publications

Stanley, Richard G., Lillis, Paul G., Pawlewicz, Mark J., Haeussler, Peter J., 2014. Rock-Eval pyrolysis and vitrinite reflectance results from the Sheep Creek 1 well, Susitna basin, south-central Alaska. U.S. Geological Survey Open-File Report 2013-1307, 12 p. [Link]

Whidden, Katherine J., Lillis, Paul G., Anna, Lawrence O., Pearson, Krystal M., Dubiel, Russell F., 2014. Geology and total petroleum systems of the Paradox Basin, Utah, Colorado, New Mexico, and Arizona. The Mountain Geologist , v. 51, p.119-138.

Cumming, V.M., Selby, D., Lillis, P.G., and Lewan, M.D., 2014, Re-Os geochronology and Os isotope fingerprinting of petroleum sourced from a Type I lacustrine kerogen: Insights from the natural Green River petroleum system in the Uinta Basin and hydrous pyrolysis experiments: Geochimica et Cosmochimica Acta, v.138, p. 32-56. [Link]

Lewan, M.D., Warden, A., Dias, R.F., Lowry, Z.K., Hannah, T.M., Lillis, P.G ., Kokaly, , R., Hoefen, T.M., Swayze, G.A., Mills, C., Harris, S.H., and Plumlee, G.S., 2014, Asphaltene content and composition as a measure of Deepwater Horizon oil spill losses within the first 80 days: Organic Geochemistry, v. 75, p. 54-60. [Link]

Gaswirth, Stephanie B., Marra, Kristen R., Cook, Troy A., Charpentier, Ronald R., Gautier, Donald L., Higley, Debra K., Klett, Timothy R., Lewan, Michael D., Lillis, Paul G., Schenk, Christopher J., Tennyson, Marilyn E., Whidden, Katherine J., 2013. Assessment of undiscovered oil resources in the Bakken and Three Forks Formations, Williston Basin Province, Montana, North Dakota, and South Dakota, 2013. U.S. Geological Survey Fact Sheet 2013-3013, 4 p. [Link]

Lillis, Paul G., and Selby, David, 2013. Evaluation of the rhenium-osmium geochronometer in the Phosphoria petroleum system, Bighorn Basin of Wyoming and Montana, USA. Geochimica Cosmochimica Acta , v. 118, p.312-330. [Link]

Stanley, Richard G., Herriott, Trystan M., Helmold, Kenneth P., Gillis, Robert J., Lillis, Paul G., 2013. Hydrocarbon-bearing sandstone in the Upper Jurassic Naknek Formation on the south shore of Kamishak Bay. Alaska Division of Geological and Geophysical Surveys Preliminary Interpretive Report 2013-1, p. 19-23. [Link]

Lillis, Paul G., 2013. Review of Oil Families and their Petroleum Systems of the Williston Basin. The Mountain Geologist, v.50, p. 5-31. [Download File]

Rooney, A. D., Selby, D., Lewan, M. D., Lillis, P. G., Houzay, J. -P. , 2012. Evaluating Re-Os systematics in organic-rich sedimentary rocks in response to petroleum generation using hydrous pyrolysis experiments. Geochimica et Cosmochimica Acta, v.77, p.275-291. [Link]

Li, Meijun, Wang, T.-G., Lillis, Paul G., Wang, Chunjiang, Shi, Shengbao, 2012. The significance of 24-norcholestanes, triaromatic steroids and dinosteroids in oils and Cambrian-Ordovician source rocks from the cratonic region of the Tarim Basin, NW China. Applied Geochemistry, v. 27, p. 1643-1654 [Link]

Cumming, Vivien M., Selby, David, Lillis, Paul G., 2012. Re–Os geochronology of the lacustrine Green River Formation: Insights into direct depositional dating of lacustrine successions, Re–Os systematics and paleocontinental weathering. Earth and Planetary Science Letters, v. 359-360, p.194-205. [Link]

LePain, D. L., Lillis P. G., Helmold, K. P., Stanley, R. G., 2012. Migrated hydrocarbons in exposure of Maastrichtian nonmarine strata near Saddle Mountain, lower Cook Inlet, Alaska. Alaska Department of Natural Reseources, Division of Geological & Geophysical Surveys, Report of Investigation 2012-1, 19 p. [Link]

Walters, C.C., Lillis, P.G. and Peters, K.E., 2012, Molecular indicators of geothermal history, in Harris, N.B., and Peters, K.E., eds., Analyzing the thermal history of sedimentary basins: methods and case studies, SEPM Special Publication no. 103, p. 17-28.

Stanley, Richard G.; Charpentier, Ronald R.; Cook, Troy A.; Houseknecht, David W.; Klett, Timothy R.; Lewis, Kristen A.; Lillis, Paul G.; Nelson, Philip H.; Phillips, Jeffrey D.; Pollastro, Richard M.; Potter, Christopher J.; Rouse, William A.; Saltus, Richard W.; Schenk, Christopher J.; Shah, Anjana K.; Valin, Zenon C., 2011. Assessment of undiscovered oil and gas resources of the Cook Inlet region, south-central Alaska, 2011. U.S. Geological Survey Fact Sheet 2011-3068, 2 p. [Link]

Gaswirth, S.B., Lillis, P.G., Pollastro, R.M. and Anna, L.O., 2011, Geologic assessment of undiscovered oil and gas resources in the Madison Group, Williston Basin, North Dakota and Montana, chap. 4 of U.S. Geological Survey Williston Basin Province Assessment Team, Assessment of undiscovered oil and gas resources of the Williston Basin Province of North Dakota, Montana, and South Dakota, 2010 : USGS Digital Data Series DDS–69–W, 28 p [Link]

Gaswirth, S.B., Lillis, P.G., Pollastro, R.M., and Anna, L.O., 2010, Geology and undiscovered oil and gas resources in the Madison Group, Williston Basin, North Dakota and Montana: The Mountain Geologist, v.47, p.71-90.

Wandrey, C.J., Kosti, A.Z., Selab, A.M., Omari, M.K., Muty, S.A., Nakshband, H.G., Hosine, A., Aminulah, Wahab, A., Hamidi, A.W., Ahmadi, N., Agena, W.F., Charpentier, R.R., Cook, T., Drenth, B.J., Klett, T.R., Lillis, P.G., Pawlewicz, M.J., and Schenk, C.J., 2009, Assessment of undiscovered petroleum resources of southern and western Afghanistan, 2009: U.S. Geological Survey Fact Sheet 2009-3070, 2 p.

Magoon, L.B., Lillis, P.G. and Peters, K.E., 2009, Total petroleum systems used to determine assessment units in the San Joaquin Basin Province for the 2003 National Oil and Gas Assessment, in Hosford Scheirer, A, ed., Petroleum systems and geologic assessment of oil and gas in the San Joaquin Basin Province, California: U.S. Geological Survey Professional Paper 1713, Chapter 8, 65 pp. [Link]

Pollastro, Richard M.; Cook, Troy A.; Roberts, Laura N. R.; Schenk, Christopher J.; Lewan, Michael D.; Anna, Lawrence O.; Gaswirth, Stephanie B.; Lillis, Paul G.; Klett, Timothy R.; Charpentier, Ronal R., 2008. Assessment of Undiscovered Oil Resources in the Devonian-Mississippian Bakken Formation, Williston Basin Province, Montana and North Dakota, 2008. Geological Survey (U.S.) Fact Sheet 2008-3021, 2 p. [Link]

Anna, Lawrence O.; Pollastro, Richard M.; Gaswirth, Stephanie B.; Lewan, Michael D.; Lillis, Paul G.; Roberts, Laura N. R.; Schenk, Christopher J.; Charpentier, Ronald R.; Cook, Troy A.; Klett, Timothy R., 2008. Assessment of Undiscovered Oil and Gas Resources of the Williston Basin Province of North Dakota, Montana, and South Dakota, 2008. Geological Survey (U.S.) Fact Sheet 2008-3092, 2 p. [Link]

Lillis, P.G., Warden, A., Claypool, G.E., and Magoon, L.B., 2008, Petroleum systems of the San Joaquin Basin — geochemical characteristics of gas types, in Hosford Scheirer, A, ed., Petroleum systems and geologic assessment of oil and gas in the San Joaquin Basin Province, California: U.S. Geological Survey Professional Paper 1713, Chapter 10, 30 pp. [Link]

Dumoulin, J.A., Burruss, R.C., and Lillis, P.G., 2008, Lisburne petroleum system, in Kelley, K.D., ed., Regional fluid flow and basin modeling in northern Alaska: U.S. Geological Survey Circular 1319, p. 36-39 [Link]

Fishman, N.S., Parris, T.M., Hall, D.L., Lillis, P.G., and Pawlewicz, M.J., 2008, Origin, Conditions, and Timing of Gas Generation in the Lewis Shale, San Juan Basin, New Mexico, in Hill, D.G., Lillis, P.G., and Curtis, J.B., eds., Gas shale in the Rocky Mountains and beyond: Rocky Mountain Association of Geologists 2008 Guidebook , p. 85-117.

Peters, K.E., Magoon, L.B., Lampe, C., Hosford Scheirer, A., Lillis, P.G., and Gautier, D.L., 2008, A four-dimensional petroleum systems model for the San Joaquin Basin Province, California, in Hosford Scheirer, A, ed., Petroleum systems and geologic assessment of oil and gas in the San Joaquin Basin Province, California: U.S. Geological Survey Professional Paper 1713, Chapter 12. 35 pp. [Link]

Ridgley, J.L., Anna, L.O., Condon, S.M., Fishman, N.S., Hester, T.C. Lillis, P.G., Rowan, E.L., Charpentier, R.R., Cook, T.A., Crovelli, R.A., Klett, T.R., and Schenk, C.J. (USGS North-Central Montana Assessment Team) 2008. Assessment of Undiscovered Biogenic Gas Resources, North-Central Montana Province: U.S. Geological Survey Fact Sheet FS-2008-3036, 2 p.

Hill, D.G., Curtis, J.B. and Lillis, P.G., Update on North America Shale-Gas Exploration and Development, in Hill, D.G., Lillis, P.G., and Curtis, J.B., eds., Gas shale in the Rocky Mountains and beyond: Rocky Mountain Association of Geologists 2008 Guidebook CD, p. 11-42.

Kirschbaum, M.A., Condon, S.M., Finn, T.M., Johnson, R.C., Lillis, P.G., Nelson, P.H., Roberts, L.N.H., Roberts, S.B., Charpentier, R.R., Cook, T.A., Klett, T.R., Pollastro, R.M., and Schenk, C.J. (Bighorn Basin Province Assessment Team), 2008, Assessment of Undiscovered Oil and Gas Resources of the Bighorn Basin Province, Wyoming and Montana, 2008: U.S. Geological Survey Fact Sheet FS-2008-3050, 2 p.

Kirschbaum, M. A.; Lillis, P. G.; Roberts, L. N. R., 2007. Chapter 3: Geologic Assessment of Undiscovered Oil and Gas Resources in the Phosphoria Total Petroleum System of the Wind River Basin Province, Wyoming. U.S. Geological Survey Data Series 69-J-3, Available online and on CD-ROM; Report: iv, 27 p. [Link]

Lillis, Paul G.; King, J. David, 2007. Characterization of Petroleum Residue in the Entrada Sandstone, Colorado National Monument. Geological Survey (U.S.) Open-File Report 2007-1360, 19 p. [Link]

Lillis, P.G., and Magoon, L.B., 2007, Petroleum systems of the San Joaquin Basin Province, California—geochemical characteristics of oil types, in Hosford Scheirer, A, ed., Petroleum systems and geologic assessment of oil and gas in the San Joaquin Basin Province, California: U.S. Geological Survey Professional Paper 1713, Chapter 9. 52 pp [Link]

Peters, K.E., Magoon, L.B., Valin, Z.C., and Lillis, P.G., 2007, Source-rock geochemistry of the San Joaquin Basin Province, California, in Hosford Scheirer, A, ed., Petroleum systems and geologic assessment of oil and gas in the San Joaquin Basin Province, California: U.S. Geological Survey Professional Paper 1713, Chapter 11, 102 pp. [Link]

Dyman, T.S., Condon, S.M., Ahlbrandt, T.S., Charpentier, R.R., Cook, T.A., Klett, T.R., Lewan, M.D., Lillis, P.G., Pawlewicz, M.J., Pollastro, R.M., and Schenk, C.J., 2007, Executive Summary—2005 Geologic Assessment of Undiscovered Oil and Gas Resources, Hanna, Laramie, and Shirley Basins Province, Wyoming and Colorado: U.S. Geological Survey Digital Data Series DDS–69–K, chap. 1, 3 p.

Lillis, P.G., 2007, Upper Cretaceous microbial petroleum systems in north-central Montana: The Mountain Geologist, v. 44, no. 1. p. 11-35. [Download File]

Lillis, P.G., Peters, K.E., and Magoon, L.B., 2006, Oil types of the Alaskan North Slope—a progress report: Geological Society of America – Abstracts with Programs, v.38, no. 5, p. 86. (Joint Technical Conference of the Pacific Section AAPG and Cordilleran GSA, Anchorage, AK, May 8-10, 2006). http://www.searchanddiscovery.com/documents/2015/30401lillis/ndx_lillis....[Link]

Ryder, Robert T.; Harris, David C.; Gerome, Paul; Hainsworth, Tim J.; Burruss, Robert C.; Lillis, Paul G.; Jarvie, Daniel M.; Pawlewicz, Mark J., 2005. Evidence for Cambrian petroleum source rocks in the Rome trough of West Virginia and Kentucky, Appalachian basin. Open-File Report 2005-1443, 79 p. [Link]

Stanley, Richard G.; Ahlbrandt, Thomas S.; Charpentier, Ronald R.; Cook, Troy A.; Crews, Jesse M.; Klett, Timothy R.; Lillis, Paul G.; Morin, Robert L.; Phillips, Jeffrey D.; Pollastro, Richard M.; Rowan, Elisabeth L.; Saltus, Richard W.; Schenk, Christopher J.; Simpson, Megan K.; Till, Alison B.; Troutman, Sandra M.; edited by Hendley, James W., II; , 2004. Oil and gas assessment of Yukon Flats, East-Central Alaska, 2004. Fact Sheet 2004-3121, 2 p. (online) [Link]

Lillis, P. G.; Magoon, L. B., 2004. Oil-Oil Correlations to Establish a Basis for Mapping Petroleum Systems, San Joaquin Basin, California. Open-File Report 2004-1037, 49 p.; complined PowerPoint slides[Link]

Lillis, Paul G., 2004. Representative Bulk Composition of Oil Types for the 2002 U.S. Geological Survey Resource Assessment of National Petroleum Reserve in Alaska. Open-File Report 2003-407, 14 p.[Link]

Magoon, L. B.; Lillis, P. G.; Bird, K. J.; Lampe, C.; Peters, K. E., 2003. Alaskan North Slope petroleum systems. Open-File Report 2003-324, 3 over-size sheets [Link]

Peters, K. E.; Bird, K. J.; Keller, M. A.; Lillis, P. G.; Magoon, L. B., 2003. Distribution, richness, quality, and thermal maturity of source rock units on the North Slope of Alaska. Open-File Report 2003-328, 3 sheets [Link]

Burruss, Robert C.; Lillis, Paul G.; Collett, Timothy S., 2003. Geochemistry of natural gas, North Slope, Alaska: implications for gas resources, NPRA. Open-File Report 2003-41, 12 figs. [Link]

Lampe, C.; Peters, K. E.; Magoon, L. B.; Bird, K. J.; Lillis, P. G., 2003. Petroleum systems of the Alaskan North Slope, a numerical journey from source to trap. Open-File Report 2003-326, 3 over-sized sheets [Link]

Lillis, P.G., Warden, A., and King, J.D., 2003, Petroleum systems of the Uinta and Piceance Basins— geochemical characteristics of oil types, Chapter 3, in Petroleum Systems and Geologic Assessment of Oil and Gas in the Uinta-Piceance Province, Utah and Colorado: U.S. Geological Survey Digital Data Series DDS-69-B, 25 p. [Link]

Kirschbaum, Mark; Finn, Thomas M.; Hettinger, Robert D.; Johnson, Edward A.; Johnson, Ronald C.; Kibler, Joyce; Lillis, Paul G.; Nelson, Philip H.; Roberts, Laura N. R.; Roberts, Stephen B.; Charpentier, Ronald R.; Cook, Troy A.; Crovelli, Robert A.; Klett, Timothy R.; Pollastro, Richard M.; Schenk, Christopher J., 2002. Assessment of undiscovered oil and gas resources of the Southwestern Wyoming Province, 2002. Fact Sheet 145-02, 2 p. [Link]

Stanley, Richard G.; Jachens, Robert C.; Lillis, Paul G.; McLaughlin, Robert J.; Kvenvolden, Keith A.; Hostettler, Frances D.; McDougall, Kristin A.; Magoon, Leslie B., 2002. Subsurface and petroleum geology of the southwestern Santa Clara Valley ("Silicon Valley"), California. Professional Paper 1663, 55 p. [Link]

Lillis, Paul G.; Magoon, Leslie B.; Stanley, Richard G.; McLaughlin, Robert J.; Warden, Augusta, 2001. Characterization of Northern California petroleum by stable carbon isotopes. U.S. Dept. of the Interior, U.S. Geological Survey, Open-File Report 99-164, 19 p. ill. ;28 cm. [Link]

Keller, Margaret A.; Macquaker, Joe H. S.; Lillis, Paul G., 2001. High resolution study of petroleum source rock variation, Lower Cretaceous (Hauterivian and Barremian) of Mikkelsen Bay, North Slope, Alaska. Open-File Report 2001-480, 3 over-size sheets, 48 x 24 inches [Link]

Lillis, Paul G., 2001. Preliminary results on the organic geochemistry of the Oligocene Creede Formation, Colorado. U.S. Dept. of the Interior, U.S. Geological Survey, Open-File Report 94-260-L, 14 p. :ill. ;28 cm. [Link]

Stanley, R.G., and Lillis, P.G., 2000, Oil-bearing rocks of the Davenport and Point Reyes areas and their implications for offset along the San Gregorio and northern San Andreas faults, in Bokelmann, G., and Kovach, R.L., eds., Proceedings of the 3rd Conference on Tectonic Problems of the San Andreas Fault System: Stanford, Calif., Stanford University Publication Geological Sciences, v. 21, p. 371-384

Tuttle, M. L.; Lillis, P. G.; Clayton, J. L., 1999. Molecular stratigraphy of the Devonian Domanik Formation, Timan-Pechora Basin, Russia. U.S. Dept. of the Interior, U.S. Geological Survey, Open-File Report 99-379, 1 v. 87 p. :ill., maps ;28 cm. [Link]

Lillis, P.G., Lewan, M.D., Warden, Augusta, Monk, M.S., and King, J.D., 1999, Identification and characterization of oil types and their source rocks, in Bird, K.J., Nelson, P.H., and Takahashi, K.I., eds., The Oil and Gas Resource Potential of the Arctic National Wildlife Refuge 1002 Area, Alaska: U.S. Geological Open File Report 98-34, p. OA1-OA101. [Link]

Magoon, L.B., Bird, K.J., Burruss, R.C., Hayba, D., Houseknecht, D.W., Keller, M.A., Lillis, P.G., and Rowan, E.L., 1999, Evaluation of hydrocarbon charge and timing using the petroleum system---Chapter PS (Petroleum Systems), in Bird, K.J., Nelson, P.H., and Takahashi, K.I., eds., The Oil and Gas Resource Potential of the 1002 Area, Arctic National Wildlife Refuge, Alaska: U.S. Geological Survey Open-File Report 98-34, p. PS1-PS66. [Link]

Ridgley, J. L., Hester, T.C., Condon, S.M., Anna, L.O., Rowan, E.L., Cook, Troy, and Lillis, P.G., 1999, Re-evaluation of the shallow biogenic gas accumulation, northern Great Plains, USA-Is the similar gas accumulation in southeastern Alberta and southwestern Saskatchewan a good analog?, in Christopher, J. E., and others, eds., Summary of Investigations 1999, Volume 1: Saskatchewan Geological Survey, Saskatchewan Energy and Mines Miscellaneous Report 99-4.1, p. 64-78.

Lillis, P. G.; Dolan, M. P.; Warden, Augusta; King, J. D. , 1998. Organic geochemistry of oils from Oil Spring and Florence oil field near Canon City, Colorado. U.S. Dept. of the Interior, U.S. Geological Survey, Open-File Report 98-617, 20 p. :ill. ;28 cm. [Link]

Clayton, J. L., Yang, Jianqiang, King, J.D., Lillis, P.G., and Warden, Augusta, 1997, Geochemistry of oils from the Junggar Basin, northwest China: American Association of Petroleum Geologists Bulletin, v. 81, no. 11, p. 1926-1944.

Lillis, Paul G.; Daws, T. A.; Pawlewicz, M. J.; Niem, A. R.; Ryu, In-Chang, 1995. Hydrocarbon source rock characterization and maturity based on rock-eval pyrolysis and vitrinite reflectance of Eocene strata, southern Oregon Coast Range, Douglas and Coos Counties, southwest Oregon. U.S. Geological Survey, Open-File Report 95-75-G, 27 p.; 30 leaves :ill., map ;28 cm. [Link]

Barker, C. E.; Palacas, J. G.; Lillis, P. G.; Daws, T. A., 1994. Gas chromatography and Rock-Eval pyrolysis analyses of some well cuttings and cores from Nevada. U.S. Geological Survey, Open-File Report 94-157, 8 p. :ill. ;28 cm. [Link]

Lillis, P.G., 1994, Soda Lake-Painted Rock(!) petroleum system in the Cuyama basin, California, U.S.A., in Magoon, L.B. and Dow, W.G., eds., The Petroleum System - from source to trap: American Association of Petroleum Geologists Memoir 60, p.437-451.

Clayton, J. L.; Warden, Augusta; Daws, T. A.; Lillis, P. G.; Michael, G. E.; Dawson, M., 1992. Organic geochemistry of black shales, marlstones, and oils of Middle Pennsylvanian rocks from the northern Denver and southeastern Powder River basins, Wyoming, Nebraska, and Colorado. Bulletin 1917-K, p. K1-K44 [Link]

Lillis, P.G., 1992, Biomarkers as thermal maturity indicators, in Magoon, L.B., ed., The petroleum system--status of research and methods, 1992: U.S. Geological Survey Bulletin 2007, p. 49-52. [Link]

Lillis, P.G., 1992, Organic geochemistry of the Miocene marine rocks and petroleum accumulations, Cuyama basin, California: Colorado School of Mines, Ph.D. Thesis, 274p.

Lillis, P.G., 1988, Correlation and characterization of oils using biological markers, Cuyama Basin, California, in Bazeley, W.J.M., ed., 1988, Tertiary Tectonics and Sedimentation in the Cuyama Basin, San Luis Obispo, Santa Barbara and Ventura Counties, California: Pacific Section Society of Economic Paleontologists and Mineralogists, v. 59, p. 39-48.

Lillis, P.G., Walawender, M. J., Smith, T. E., and Wilson, J., 1979, Petrology and emplacement of the Corte Madera Gabbro Pluton, Southern California, in Abbott, P. L. and Todd, V. R., eds., Mesozoic crystalline rocks - Peninsular Ranges Batholith and pegmatites, Point Sal Ophiolite: Geological Society of America Annual Meeting Field Trip Guidebook, p. 143-150.

Lillis, P.G., 1978, Petrography, geochemistry and structure of the Corte Madera Gabbro Pluton, San Diego County, California, Master's Thesis, San Diego State University.

 

 

TECHNICAL PRESENTATIONS

A1.   Lillis, P.G., and Lagoe, M. B., 1983, Regional patterns of oil gravity in the Monterey Formation, Santa Maria Basin, California:  Implications for petroleum exploration and tectonic history, in Isaacs, C. M., and Garrison, R. E., eds., Petroleum Generation and Occurrence in the Miocene Monterey Formation, California, p. 225:  Pacific Section Society of Economic Paleontologists and Mineralogists, Los Angeles, California.  (AAPG Pacific Section Meeting, Sacramento).  

A2.   Lillis, P.G., 1988, Correlation of oils and source rock characteristics using biological markers, Cuyama Basin, California:  American Association of Petroleum Geologists Bulletin, v. 72, no. 3, p. 386.  (Pacific Section AAPG Meeting, Santa Barbara, CA, April 17-19, 1988).  

A3.   Lillis, P.G., 1990, Biomarker variations in relation to paleogeography in the Saltos Shale member of the Monterey Formation, Cuyama basin, California:  American Association of Petroleum Geologists Bulletin, v. 74, no. 5, p. 704. (AAPG Annual Meeting, San Francisco, CA, June 3-6, 1990).    

A4.   King, J. D., and Lillis, P.G., 1990, Thermal modeling using biomarkers in the Santa Maria basin, California:  American Association of Petroleum Geologists Bulletin, v. 74, no. 5, p. 695.  (AAPG Annual Meeting, San Francisco, CA, June 3-6, 1990).  

A5.   Lillis, P.G., and Clark, M. S., 1991, Correlation of source rocks and oils in the Sespe oil field, Ventura County, California:  American Association of Petroleum Geologists Bulletin, v. 75, no. 2, p. 372.  (Pacific Section AAPG Meeting, Bakersfield, CA, March 6-8, 1991).   

A6.   Lillis, P.G., and King, J. D., 1991, Controls on the variation of crude oil quality, Santa Maria Basin California:  American Association of Petroleum Geologists Bulletin, v. 75, no. 2, p. 372.  (Pacific Section AAPG Meeting, Bakersfield, CA, March 6-8, 1991).  

A7.   Ball, M. M., Clayton, J. L., Ulmishek, G. F., Lillis, P.G., Dolton, G. L., Daws, T. A., Mast, R. F., Warden, Augusta, Keller, Michael, Bogino, Vladamir, and Poznaikovitch, Zinovy, 1992, Petroleum geology and exploration potential of the Pripyat basin, U.S.S.R: U.S. Geological Survey Circular 1074, p. 2-3. (Eighth V. E. McKelvey Forum on Mineral and Energy Resources, Houston, TX., 1992).

A8.   Clayton, J.L., Ulmishek, G.F., Lillis, P.G., Ball, M.M., Dolton, G.L., Daws, T.A., Mast, R.F., Warden, Augusta, Keller, M.B., Bogino, V.A., Ponznaikovitch, Zinovy, and Jianqiang, Yang, 1993, Petroleum geochemistry and exploration potential of the Pripyat Basin, U.S.S.R.: American Association of Petroleum Geologists National Meeting Abstracts, v.2, p. 86  (AAPG Annual Meeting, New Orleans, La., April 25-28, 1993).

A9.   Clark, M.S., Lillis, P.G., and Gregory, Glenn, 1993, The Sespe oil fields--A possible kinetic trap with a subthrust source:  American Association of Petroleum Geologists Bulletin, v. 77, no. 4, p. 693. (Pacific Section AAPG, Long Beach, CA, May 5-7, 1993).

A10. Lillis, P.G., 1994, A second petroleum system (?) in Cuyama basin, California:  American Association of Petroleum Geologists Bulletin, v.78, p.668. (Pacific Section AAPG Meeting, Ventura, CA, April 27-29, 1994).   

A11. Lillis, P.G., 1994, Biomarkers as paleobathymetry indicators?--A case study from the Miocene marine rocks, central California:  American Association of Petroleum Geologists National Meeting Abstracts, v.3, p.198, (AAPG Annual Meeting, Denver, CO, June 12-15, 1994).  

A12. Lillis, P.G., 1994, Preliminary results of the organic geochemistry of the Oligocene Creede Formation, Colorado: Geological Society of America National Meeting Abstracts, v. 26, no.7, p. A-401 (GSA Annual Meeting, Seattle, WA, October 24-27, 1994).   

A13. Magoon, L.B., Jr., Castano, J.R., Lillis, P.G., MacKevett, N.H., and Naeser, N., 1994, Sacramento basin, California, petroleum systems--A case for long-range migration:  American Association of Petroleum Geologists National Meeting Abstracts, v.3, p. 204, (Denver, CO, June 12-15, 1994).

A14. Magoon, L.B., Jr., Castano, J.R., Lillis, P.G., MacKevett, N. H., and Naeser, N., 1994, Two petroleum systems in the Sacramento basin--A basis for new discoveries:  American Association of Petroleum Geologists Bulletin, v. 78, p.669 (Pacific Section AAPG Meeting, Ventura, CA, April 27-29, 1994).

A15. Isaacs, C.M., Price, L.C., Beyer, L.A., Bird, K.J., Herring, J.R., Keller, M.A., Lillis, P.G., Magoon, L.B., Piper, D.Z., Stanley, R.G., and Tennyson, M.E., 1995, Quality, availability, and environmental concerns of oil in California, in Carter, L.M.H., ed., Energy and the Environment - Application of Geosciences to Decision-Making: Program and Short Papers; 10th V.E. McKelvey Forum on Mineral and Energy Resources, 1995: U.S. Geological Survey Circular 1108, p. 56-58.

A16. Lillis, P.G., Palacas, J.G. and Warden, A., 1995, A Precambrian-Cambrian oil play in southern Utah: American Association of Petroleum Geologists Bulletin, v.79, p. 921 (Rocky Mountain Section AAPG Meeting, Reno, NV, July 16-19, 1995).

A17. Magoon, L.B., Lillis, P.G., Warden, A., Stanley, R.G., MacKevett, N.H., and Castano, J., 1995, Carbon isotopic compositions identify four petroleum types in Northern California: American Association of Petroleum Geologists Bulletin, v. 79, p.592 (Pacific Section AAPG Meeting, San Francisco, CA, May 2-5, 1995).    

A18. Clayton, J.L., Ulmishek, G.F. Monk, S. Lillis, P.G., Bogino, V.A., Pozniakevich, Z.L., and Keller, M.B., 1996, Geological and geochemical controls on oil occurrence and future exploration potential, Pripyat Basin, Byelarus:  American Association of Petroleum Geologists Annual Meeting, Abstracts and Program, v.5, p.A27, (AAPG Annual Meeting, San Diego, CA, May 19-22, 1996).

A19. Magoon, L. B., Lillis, P.G., and Stanley, R.G., 1996, Carbon isotopes indicate a common origin for oils from mercury and gold deposits and Cretaceous reservoir rocks in northern California, California, USA: Memorias del V Congreso Latinoamericano de Geoquimica Organica, Cancun, Mexico, 1996, p. 82.

A20. Magoon, L. B., Valin, Z.C., and Lillis, P.G., 1996, Petroleum systems in the Sacramento Basin, California, USA: American Association of Petroleum Geologists Bulletin, v. 80, no.8, p. 1310. (AAPG International Conference and Exhibition, Caracas, Venezuela, September 8-11, 1996).

A21. Stanley, R.G., Jachens, R.C., Kvenvolden, K.A., Hostettler, F.D., Magoon, L.B., and Lillis, P.G., 1996, Evidence for an oil-bearing sedimentary basin of probable Miocene age beneath “Silicon Valley,”California: American Association of Petroleum Geologists Annual Meeting, Abstracts and Program, v.5, p. A133. (AAPG Annual Meeting, San Diego, CA, May 19-22, 1996).

A22. Lillis, P.G., and Palacas, J.G., 1997, Oil families in the Grand Staircase--Escalante National Monument, Utah: Learning from the Land Scientific Inquiry for Planning and Managing the Grand Staircase-Escalante National Monument, Bureau of Land Management Report BLM/UT/GI-98/006+1220, pp.319-320. (Southern Utah University, Cedar City, UT, November 3-6, 1997),  

A23. Stanley, R. G., Jachens, R.C., Lillis, P.G., McLaughlin, R.J., Kvenvolden, K.A., Hostettler, F.D., and Magoon, L.B., 1998, Subsurface geology, Neogene tectonics, and petroleum of the southwestern Santa Clara Valley ("Silicon Valley"), California: American Association of Petroleum Geologists Bulletin, v. 82, no. 5A, p. 859. (Pacific Section, AAPG meeting, Ventura, CA, April 29-May 1, 1998).

A24. Lillis, P.G., and Stanley, R.G., 1999, Petroleum Systems of the La Honda Basin, Santa Cruz Mountains, California: American Association of Petroleum Geologists Bulletin, v. 83, no. 4, p. 694. (Pacific Section AAPG meeting, Monterey, California, April 28-30, 1999)   

A25. Magoon, L. B., Lorenson, T.D., McLaughlin, R.J., Stanley, R.G., Valin, Z.C., Lillis, P.G., Hodgson, S.F., Davisson, M.L., and Underwood, M.B., 1999, The geology and geochemistry of oil and gas seeps in California indicate up to tens of kilometers of petroleum migration: American Association of Petroleum Geologists Bulletin, v. 83, no. 4, p. 695-696. (Pacific Section AAPG meeting, Monterey, California, April 28-30, 1999).

A26. McLaughlin, R. J., Stanley, R.G., Lillis, P.G., Magoon, L.B., Valin, Z.C., Underwood, M.B., Aalto, K.R., and van de Kamp, P.C., 1999, Origin of petroleum, Neogene accretionary margin, Cape Mendocino, Eel River basin, northwestern California: American Association of Petroleum Geologists Bulletin, v. 83, no. 4, p. 696.  (Pacific Section AAPG meeting, Monterey, California, April 28-30, 1999).

A27. Ridgley, J. L., Condon, S.M., Anna, L.O., Hester, T.C., Rowan, E.L., Cook, Troy, and Lillis, P.G., 1999, Re-examination of Cretaceous shallow biogenic gas resources, Northern Great Plains, Montana; a multidisciplinary approach: American Association of Petroleum Geologists Bulletin, v. 83, p.1187, (Rocky Mountain Section AAPG Meeting, Bozeman, MT, August 6-7. 1999).

A28. Stanley, R. G., and Lillis, P.G., 1999, New organic geochemical results from surface occurrences of oil and potential source rocks of oil near Point Reyes, Marin County, California: American Association of Petroleum Geologists Bulletin 83, no. 4, p. 702. (Pacific Section AAPG meeting, Monterey, California, April 28-30, 1999).

A29. Stanley, R. G., and Lillis, P.G., 1999, Geology and organic geochemistry of oils from Davenport and Point Reyes, California, and implications for right-lateral displacement along the San Gregorio and San Andreas faults: Eos, Transactions, American Geophysical Union, v.80, no.46, p.1004. (AGU 1999 fall meeting, San Francisco, CA, Dec 13-17, 1999).

A30. Claypool, G. E., Magoon, L.B., III, Lorenson, T., Valin, Z., Warden, A., Lillis, P.G., and Kaplan, I., 2000, Natural gas in the Great Valley of California; characterization, origin, and petroleum systems: American Association of Petroleum Geologists Bulletin, v. 84, no. 6, p. 863. (Pacific Section AAPG and Western Region Society of Petroleum Engineers Meeting, Long Beach, CA, June 19-22, 2000).

A31  Condon, S.M., Ridgley, J.L., Rowan, E.L., Anna, L.O., Lillis, P.G., Hester, T.C., Cook, T., 2000, Re-evaluation of controls on Cretaceous shallow biogenic gas accumulations, Northern Great Plains, USA, and southeast Alberta and southwest Saskatchewan, Canada:  Program with Abstracts - Geological Association of Canada, Mineralogical Association of Canada: Joint Annual Meeting, vol.25, unpaginated, http://cseg.ca/conferences/2000/2000abstracts/592.PDF (Geoscience 2000, the millennium geoscience summit, Calgary, AB, Canada, May 29-June 2, 2000).

A32. Claypool, G.E., Magoon, L.B., Lorenson, T.D., Lillis, P.G., and Kaplan, I.R., 2001, Natural gas in the Great Valley of California; geochemical characterization, origin, and petroleum systems: American Association of Petroleum Geologists Annual Meeting Expanded Abstracts, v.2001, p. 37. (AAPG Annual Meeting, Denver, CO, June 3-6, 2001).

A33. Keller, M.A., Macquaker, J.H.S., and Lillis, P.G., 2001, A high resolution study of petroleum source rock variation, Lower Cretaceous (Hauterivian and Barremian) of Mikkelsen Bay, North Slope, Alaska: American Association of Petroleum Geologists Annual Meeting, Expanded Abstracts, v. 10, p. A102-A103. (AAPG Annual Meeting, Denver, CO, June 3-6, 2001).

A34. Ridgley, J. L., Condon, S.M., Hester, T.C., Anna, L.O., Cook, Troy, Fishman, N.S., Rowan, E.L., and Lillis, P.G., 2001, Shallow biogenic gas resources of north-central Montana--A reassessment: American Association of Petroleum Geologists Annual Meeting, Expanded Abstracts, v. 10, p.167 (Denver, CO, June 3-6, 2001).

A35. Ridgley, J. L., Hester, T.C., Condon, S.M., Cook, Troy, Anna, L.O., Lillis, P.G., and Snyder, G.T., 2001, Assessment of shallow biogenic gas resources in Montana: Canadian Society of Petroleum Geologists Annual Meeting, Abstracts with Program, 2 p., (Calgary, Alberta, Canada, June 18-22, 2001).

A36. Rowan, E.L., Anna, L.O., Lillis, P.G., Condon, S.M., Hester, T.C., and Ridgley, J.L., 2001, Rates of methane migration by diffusion: Implications for the age of gas resources in north-central Montana: American Association of Petroleum Geologists Annual Conventional Program, v.10, p. 174. (AAPG Annual Meeting, Denver, Colorado, June 3-6, 2001).

A37. Stanley, R.G. and Lillis, P.G, 2001, Tectonic disruption of a Miocene petroleum system in coastal California: American Association of Petroleum Geologists Bulletin, v.85, no.6, p.1144, (Pacific Section, AAPG, Cordilleran Section GSA, Universal City, CA, April 9-11, 2001).

A38. Burruss, R.C., Lillis, P.G., and Collett, T.S., 2002, Geochemistry of natural gas, North Slope, Alaska; implications for future oil and gas resources, NPRA: American Association of Petroleum Geologists Bulletin, v. 86, no. 6, p. 1139. (Pacific Section AAPG and SPE Western Region conference, Anchorage, AK, May 18-23, 2002).

A39. Fishman, N. S., Ridgley, J.L., Hall, D.L., and Lillis, P.G., 2002, Timing of Biogenic Methane Generation in Cretaceous rocks of the Northern Great Plains, southeastern Alberta and southwestern Saskatchewan: petrologic and fluid inclusion evidence: American Association of Petroleum Geologists Annual Meeting Expanded Abstracts, v. 2002, p.56. (AAPG Annual Meeting, Houston, TX, March 10-13, 2002).

A40. Lillis, P.G., King, J.D., Warden, A., and Pribil, M.J., 2002, Oil-source rock correlation studies, central Brooks Range foothills and National Petroleum Reserve, Alaska (NPRA): American Association of Petroleum Geologists Bulletin, v. 86, no. 6, p. 1150. (AAPG Pacific Section and SPE Western Region Conference, Anchorage, AK, May 18-23, 2002).    

A41. Lillis, P.G., Ridgley, J.L., and Rowan, E.L., 2002, Timing of microbial gas generation in Upper Cretaceous petroleum systems of northeastern Montana: Annual Meeting Expanded Abstracts, v. 2002, p.103. (AAPG Annual Meeting, Houston, TX, March 10-13, 2002).

A42. Magoon, L.B., Lillis, P.G., Bird, K.J., and Lampe, C., 2002, Petroleum systems of the Alaskan North Slope-a progress report: American Association of Petroleum Geologists Bulletin, v. 86, no. 6, p. 1151. (AAPG Pacific Section and SPE Western Region Conference, Anchorage, AK, May 18-23, 2002).   

A43. Ridgley, J. L., Snyder, G.T., and Lillis, P.G., 2002, Geochemistry of the Late Cretaceous shallow gas system in Montana, Saskatchewan, and Alberta--isotope and compositional systematics: Geological Association of Canada, Saskatoon, Canada, May 27-29, 2002, 1 p.

A44. Lampe, C., Peters, K.E., Magoon, L.B., Bird, K.J., Lillis, P.G., 2003, The Shublik's petroleum systems of the Alaskan North Slope; a numerical journey from source to trap: American Association of Petroleum Geologists Annual Meeting Expanded Abstracts, v.12, p.98. (AAPG Annual Meeting with SEPM, Salt Lake City, UT, May 11-14, 2003).

A45. Magoon, L.B., Claypool, G.E., Gautier, D.L., Lillis, P.G., Peters, K.E., Hosford Scheirer, A., 2003, Modeling the petroleum systems in the San Joaquin Basin, California: Abstracts with Programs - Geological Society of America, vol.35, no.6, p.486.  (GSA Annual Meeting, Seattle, WA, Nov. 2-5, 2003).

A46. Magoon, L.B., Lillis, P.G., Bird, K.J., Lampe, C., Peters, K.E., 2003, Alaskan North Slope petroleum systems: Annual Meeting Expanded Abstracts - American Association of Petroleum Geologists, v.12, p.111. (AAPG annual convention with SEPM, Salt Lake City, UT, May 11-14, 2003).

A47. Peters, K.E., Bird, K.J., Keller, M.A., Lillis, P.G., Magoon, L.B., 2003, Distribution, richness, quality, and thermal maturity of source rock units on the North Slope of Alaska: Annual Meeting Expanded Abstracts - American Association of Petroleum Geologists, vol.12, pp.137, (AAPG annual convention with SEPM, Salt Lake City, UT, May 11-14, 2003).

A48. Peters, K.E., Lampe, C., Magoon, L.B., Lillis, P.G., 2003, Quantitative modeling of petroleum systems on the North Slope of Alaska: Abstracts with Programs - Geological Society of America, vol.35, no.6, p.486. (GSA Annual Meeting, Seattle, WA, Nov. 2-5, 2003).

A49. Ryder, R. T., Harris, D. C., Gerome, P., Hainsworth, T. J., Burruss, R. C., Lillis, P.G., and Jarvie, D. M., 2003, Cambrian petroleum source rocks in the Rome trough of West Virginia and Kentucky:  Final program and abstracts American Association of Petroleum Geologists -SPE Eastern Meeting Conference and Exhibition, p. 29.http://www.searchanddiscovery.com/documents/abstracts/east2003/index.htm/ryder.pdf  (AAPG Meeting, Pittsburgh, PA, September 6-10, 2003).

A50. Gautier, D.L., Klett, T.R., Lillis, P.G., Magoon, L.B., Peters, K.E., Hosford-Scheirer, A. and Tennyson, M.E., 2004, Definition of assessment units and methodology for assessment of undiscovered resources in a well-explored basin: American Association of Petroleum Geologists Bulletin, v. 88, no.13. (Supplement) 2004, (Pacific Sections AAPG, SEPM & SEG, Bakersfield, California, May 9–12, 2004).

A51. Gautier, D.L., Klett, T.R., Lillis, P.G., Magoon, L.B., Peters, K.E., Hosford-Scheirer, A. and Tennyson, M.E., 2004, Resource potential of the San Joaquin Basin: results of the USGS assessment: American Association of Petroleum Geologists Bulletin, v. 88, no.13. (Supplement) 2004, (Pacific Sections AAPG, SEPM & SEG, Bakersfield, California, May 9–12, 2004).

A52.  Lillis, P.G., and Magoon, L.B., 2004, Petroleum geochemical criteria for mapping the petroleum systems in the San Joaquin Basin, California: American Association of Petroleum Geologists Bulletin, v. 88, no.13. (Supplement) 2004. (Pacific Section AAPG Meeting, Bakersfield, CA, May 9-11, 2004)  

A53.  Lillis, P.G., Warden, A., Claypool, G.E., and Magoon, L.B., 2004, Natural gas in the San Joaquin Basin - geochemical characterization of the petroleum systems: American Association of Petroleum Geologists Bulletin, v. 88, no.13. (Supplement) 2004. (Pacific Section AAPG Meeting, Bakersfield, CA, May 9-11, 2004)  

A54.  Magoon, L.B., Lillis, P.G., Peters, K.E., Hosford Scheirer, A., Lampe, C., Gautier. D.L., 2004, Four petroleum systems in the San Joaquin Basin, California: American Association of Petroleum Geologists Bulletin, v. 88, no.13. (Supplement) 2004. (Pacific Section AAPG Meeting, Bakersfield, CA, May 9-11, 2004)

A55. Magoon, L.B., Peters, K.E., Hosford Scheirer, A., Lampe, C., Gautier, D.L., Lillis, P.G., 2004, Modeling the petroleum systems in the San Joaquin Basin, California: American Association of Petroleum Geologists, Annual Meeting Expanded Abstracts, v. 13, p.90.(AAPG Annual Meeting, Dallas, TX, April 18-21, 2004).

A56. Peters, K.E, Bird, K.J., Magoon, L.B., Lampe, C., Lillis, P.G., Verma, M.K. 2004, Modeling petroleum systems on the North Slope of Alaska: American Association of Petroleum Geologists, Annual Meeting Expanded Abstracts, v.13, p.110 (AAPG Annual Meeting, Dallas, TX, April 18-21, 2004). 

A57.  Peters, K.E., Magoon, L.B., Hosford-Scheirer, A., Lampe, C., Gautier, D.L., and Lillis, P.G., 2004, Charge risk and 3-D visualization of petroleum systems in the San Joaquin Basin, California: American Association of Petroleum Geologists Bulletin, Vol. 88, No.13. (Supplement) (AAPG International Conference, Cancun, Mexico, October 24-27, 2004).

A58.  Peters, K.E., Magoon, L.B., Hosford-Scheirer, A., Lampe, C., Gautier, D.L., and Lillis, P.G., 2004, A 3D petroleum system model for the San Joaquin Basin, California: American Association of Petroleum Geologists, Pacific Section 2004 Annual Meeting, Bakersfield, CA, Tuesday May 11, 2004, Program and Abstracts, p. A21. 

A59. Crews, J.M. Stanley, R.G. Till, A.B. Lillis, P.G. and Simpson, M.K. 2005, Surface thermal maturity of the Yukon Flats region, east-central Alaska: Geological Society of America – Abstracts with Programs, v.37, no. 4, p. 95. (Joint Technical Conference of the Pacific Section AAPG and Cordilleran GSA, April 29-May 3, 2005, San Jose, CA).

A60.  Dumoulin, J.A., Burruss, R.C., Lillis, P.G., and Parris, T.M., 2005, New field and geochemical evidence of the nature and extent of the Lisburne petroleum system (northern Alaska): Geological Society of America – Abstracts with Programs, v.37, no. 4, p. 93. (Joint Technical Conference of the Pacific Section AAPG and Cordilleran GSA, April 29-May 3, 2005, San Jose, CA).

A61.  Johnson, R.C., Finn, T.M., Roberts, S.B., Roberts, L.N.R., Lillis, P.G., and Nelson, P.H., 2005, Upper Cretaceous and Tertiary petroleum systems and assessment units, Wind River Basin, Wyoming: American Association of Petroleum Geologists Meeting Program, p. 34. (Rocky Mountain Section AAPG Meeting, Jackson, Wyoming, Sept 24-26, 2005)

A62. Lillis, P.G. and Johnson, R.C., 2005, Characterization of the natural gas systems of the Wind River Basin, Wyoming: American Association of Petroleum Geologists Meeting Program, p. 37. (Rocky Mountain Section AAPG Meeting, Jackson, Wyoming, Sept 24-26, 2005).   

A63. Lillis, P.G. and Stanley, R.G., 2005, Evaluation of petroleum source rocks from Yukon Flats, east-central Alaska: Geological Society of America – Abstracts with Programs, v.37, no. 4, p. 94. (Joint Technical Conference of the Pacific Section AAPG and Cordilleran GSA, April 29-May 3, 2005, San Jose, CA).  

A64.  Roberts, S.B., Johnson, R.C., and Lillis, P.G., 2005, The Waltman Shale total petroleum system: does it have a favorable future:  American Association of Petroleum Geologists Meeting Program, p. 46. (Rocky Mountain Section AAPG Meeting, Jackson, Wyoming, Sept 24-26, 2005).

A65.  Stanley, R.G., Till, A.B., Simpson, M.K., Schenk, C.J., Saltus, R.W., Rowan, E.L., Phillips, J.D., Morin, R.L., Lillis, P.G., Crews, J.M., 2005, Assessment of undiscovered oil and gas resources in Yukon Flats, east-central Alaska: Geological Society of America – Abstracts with Programs, v.37, no. 4, p. 95.  (Joint Technical Conference of the Pacific Section AAPG and Cordilleran GSA, April 29-May 3, 2005, San Jose, CA).

A66.  Stanley, R.G., Wentworth, C.M., Williams, R.A., Jachens, R.C., Graymer, R.W., Catchings, R.D., McLaughlin, R.J., Lillis, P.G., White, L.D., Valin, Z.C., 2005, Concealed sedimentary basins beneath the Santa Clara Valley, California: Geological Society of America – Abstracts with Programs, v.37, no. 4, p.57, (Joint Technical Conference of the Pacific Section AAPG and Cordilleran GSA, April 29-May 3, 2005, San Jose, CA).

A67. Fishman, N.S., Lillis, P.G., Hall, D.L., and Higley, D.K., 2006, The need of a paradigm for ancient microbial gas accumulations – the Upper Cretaceous Milk River Formation, Alberta and Saskatchewan: American Association of Petroleum Geologists Bulletin, v. 90, Program Abstracts (Digital), (AAPG Annual Meeting, Houston, Texas, April 9-12, 2006).

A68. Hill, R.J., Lillis, P.G., King, J.D., Klett, T., Ulmishek, G., Wandrey, C., Abdul, A.Z., Selab, A.M., Khalikov, K., Latyfov, K.Z., 2006, Preliminary geochemical study of Afghanistan and Tajikistan petroleum and source rocks: American Association of Petroleum Geologists Bulletin, v. 90 (2006), Program Abstracts (Digital) (AAPG Annual Meeting, Houston, Texas, April 9-12, 2006).

A69. Lillis, P.G., Magoon, L.B., and Peters, K.E., 2006, Identification and characterization of oil types in the San Joaquin Basin, California: American Association of Petroleum Geologists International Conference and Exhibition, Abstracts, v.16, p.74. (AAPG International Conference, Perth, Australia, November 5-8, 2006)  

A70. Lillis, P.G., Peters, K.E., and Magoon, L.B., 2006, Oil types of the Alaskan North Slope—a progress report: Geological Society of America – Abstracts with Programs, v.38, no. 5, p. 86. (Joint Technical Conference of the Pacific Section AAPG and Cordilleran GSA, Anchorage, AK, May 8-10, 2006).  

A71. Stanley, R.G., Till, A.B., Simpson, M.K., Schenk, C.J., Saltus, R.W., Rowan, E.L., Phillips, J.D., Morin, R.L., Lillis, P.G., Crews, J.M., 2006 Petroleum potential of Yukon Flats, East-Central Alaska: Geological Society of America – Abstracts with Programs, v.38, no. 5, p. 15. (Joint Technical Conference of the Pacific Section AAPG and Cordilleran GSA, Anchorage, AK, May 8-10, 2006).

A72. Kirschbaum, M.A., Cook, T., Dubiel, R.F., Finn, T.M, Lillis, P.G., Johnson, E.A., Johnson, R.C., Nelson, P.H., Roberts, L.N.R., and Roberts, S.B., 2007, A review of the U.S. Geological Survey 2002 geologic assessment of resources in the Uinta Basin: American Association of Petroleum Geologists, Rocky Mountain Section, Abstracts and Program, p. 44. (Rocky Mountain Section, AAPG Meeting, Snowbird,Utah, October 7-9, 2007).

A73. Magoon, L.B., Hosford-Scheirer, A., and Lillis, P.G., 2007, Petroleum systems of the Sacramento Basin and adjacent area, California: American Association of Petroleum Geologists Bulletin, v. 91 (2007), Program Abstracts (Digital), (AAPG Annual Meeting, Long Beach, CA, April 1-4, 2007).

A74. Lillis, P.G., Ellis, G.S., Dempsey, M.P., and Cumella, S.P., 2008, Origin of gas in the Mamm Creek Field, Piceance Basin, Colorado: American Association of Petroleum Geologists, Rocky Mountain Section, Abstracts and Program, (Rocky Mountain Section, AAPG Meeting, Denver, CO, July 9-11, 2008).  

A75. Lillis, P.G., Selby, D., and Lewan, M.D., 2008, Application of Rhenium-Osmium geochronology to Phosphoria oils, Wyoming: American Association of Petroleum Geologists, Rocky Mountain Section, Abstracts and Program, (Rocky Mountain Section, AAPG Meeting, Denver, CO, July 9-11, 2008).  

A76. Anna, L., Pollastro, R.M.,Gaswirth, S.B., Lillis, P.G., Roberts, L.N., and Cook, T., 2009, Assessment of undiscovered oil and gas resources of the Williston Basin Province of North Dakota, Montana, and South Dakota, 2008: American Association of Petroleum Geologists, Abstracts and Program, v. 18, p.12 (AAPG National Meeting, Denver, CO, June 7-10, 2009).

A77. Ellis, G.S., Lillis, P.G., Dewane, T., and Cumella, S.P., 2009, 3-dimensional modeling of the molecular and isotopic composition of gases from Mamm Creek Field, Piceance Basin, Colorado: AAPG Hedburg Research Conference program and abstracts, unpaginated, (American Association of Petroleum Geologists Hedburg Research Conference, Basins and petroleum system modeling: new horizons in research and applications, May 3-8, 2009, Napa, California).

A78. Gaswirth, S.B., Pollastro, R.M., Anna, L., Lillis, P.G., and Roberts, L.N.R., 2009, Geology and assessment of undiscovered oil and gas resources in the Lodgepole Formation, Williston Basin, North Dakota and Montana: American Association of Petroleum Geologists, Abstracts and Program, v. 18, p.76 (AAPG National Meeting, Denver, CO, June 7-10, 2009).

A79. Keller, M.A., Macquaker, J., and Lillis, P.G., 2009, Organic carbon-rich sedimentation in from Early Cretaceous Arctic Sea: nutrients supplied by sediment-laden seasonal sea-ice and volcanic ash: American Association of Petroleum Geologists, Abstracts and Program, v. 18, p.113 (AAPG National Meeting, Denver, CO, June 7-10, 2009).

A80. Cumming, V.M., Selby, D., and Lillis, P.G., 2010, Rhenium-Osmium geochronology of the Eocene Green River Formation: establishing an absolute geochronological tool for lacustrine organic-rich sediments: GSA Abstracts with Programs, v.42, no. 5, p. 168. (GSA National Meeting, Denver, CO, October 31-November 3, 2010.)

A81. Ellis, G.S., Lillis, P.G., Cumella, S.P., and Dewane, T.J., 2010, Kinetic isotope fractionation modeling of natural gas geochemistry in the Mamm Creek field, Piceance Basin, Colorado: American Association of Petroleum Geologists, Abstracts and Program, v. 19, p.70 (AAPG National Meeting, New Orleans, LA, April 11-14)

A82. Gaswirth, S.B., Lillis, P.G., Roberts, L.N.R., and Anna, L.O., 2010, Undiscovered oil and gas resources in the Mission Canyon and Charles Formations, Williston Basin, North Dakota and Montana: American Association of Petroleum Geologists, Abstracts and Program, v. 19, p.86 (AAPG National Meeting, New Orleans, LA, April 11-14).

A83. Lillis, P.G. and Selby, D., 2010, Rhenium-Osmium geochronology of Phosphoria oils, Big Horn Basin, Wyoming: American Association of Petroleum Geologists, Abstracts and Program, v. 19, p.149 (AAPG National Meeting, New Orleans, LA, April 11-14).

A84. Lillis, P.G. and Selby, D., 2010, Preliminary Evaluation of the Rhenium-Osmium Geochronology of Phosphoria Oils, Big Horn Basin, Wyoming: The Society of Organic Petrology, Annual Meeting Abstracts and Program, p.15 (Lakewood, CO, September12-16, 2010).  

A85. Peters, K.E., Ramos, L.S., Magoon, L.B. Lillis, P.G. and Zumberge, J.E., 2010, San Joaquin Basin petroleum systems: new evidence for multiple Kreyenhagen and Antelope source-rock organofacies: American Association of Petroleum Geologists, Abstracts and Program, v. 19, p.200 (AAPG National Meeting, New Orleans, LA, April 11-14).

A86. Cumming, V.M., Selby, D., and Lillis, P.G., 2011, Re-Os geochronology of lacustrine organic-rich sedimentary rocks: Systematics and implications:  Mineralogical Magazine, v. 75, no. 3, pp.710, (Goldschmidt Conference, Prague, Czech Republic, August 14-19, 2011).

A87. Ellis, G.S., Lillis, P.G., Cumella, S.P., Pasternak, I. and Tang, Y., 2011, Kinetic isotopic fractionation modeling integrated into a 3-D basin model: A case study from Mamm Creek Field, Piceance Basin, Colorado: AAPG Hedberg Research Conference program and abstracts, unpaginated, (American Association Petroleum Geologists Hedberg Conference, Natural gas geochemistry: recent developments, applications, and technologies, May 9-12, 2011, Beijing, China.

A88. Lewan, M.D., Warden, A., Dias, R.F., Lowry, Z.K., Hannah, T.M., Lillis, P.G., Kokaly, ,  R., Hoefen, T.M., Swayze, G.A., Mills, C., Harris, S.H., Plumlee, G.S., Marshall, B. D., 2011,   Asphaltene content as a measure of oil losses related to the Deepwater Horizon oil spill: Mineralogical Magazine, v. 75, no. 3, pp.1305, (Goldschmidt Conference, Prague, Czech Republic, August 14-19, 2011).

A89. Lillis, P.G. and Stanley, R.G., 2011, Petroleum generation modeling for Cook Inlet Basin, Alaska: American Association of Petroleum Geologists, Program with Abstracts, p.72 (AAPG Pacific Section Meeting,Anchorage, Alaska, May 8-11, 2011. 

A90. Peters, K., Ramos, L. S., Magoon, L., Lillis, P.G., and Zumberge, J., 2011, Decision-tree chemometrics of biomarker and isotope data identifies multiple petroleum systems in the San Joaquin Basin, California: 25th International Meeting on Organic Geochemistry (IMOG) Book of Abstracts, p. 436 (IMOG 2011, September 18-23, 2011, Interlaken, Switzerland).

A91. Stanley, R.G., Potter, C.J., Houseknecht, D.W., Lillis, P.G., Lewis, K.A., Nelson, P.A., Rouse, W.A., Schenk, C.J., Saltus, R., Phillips, J.D., Shah, A.K., Valin, Z.C., 2011, Assessment of undiscovered oil and gas potential, Cook Inlet Basin, Alaska: American Association of Petroleum Geologists, Program with Abstracts,  p.88 (AAPG Pacific Section Meeting, Anchorage, Alaska, May 8-11, 2011.

A92. Stanley, R.G. and Lillis, P.G., 2011, Preliminary interpretation of Rock-Eval pyrolysis and vitrinite reflectance results from the Nunivak 1 well in the Nenana Basin, Central Alaska: American Association of Petroleum Geologists, Program with Abstracts, p. 87 (AAPG Pacific Section Meeting, Anchorage, Alaska, May 8-11, 2011.

A93. Cumming, V.M., Selby, D., Lillis, P.G., and Lewan, M.D., 2012, Re-Os geochronology and PGE oil-source fingerprinting of the lacustrine Green River petroleum system: 34th International Geological Congress (IGC): Australia 2012 (Brisbane, Australia, August 5-10, 2012).

A94. Cumming, V.M., Selby, D., Poulton, S.W., and Lillis, P.G., 2012, Re-Os geochronology of lacustrine organic-rich rocks: Insights into the Mesoproterozoic terrestrial environment: 34th International Geological Congress (IGC): Australia 2012 (Brisbane, Australia, August 5-10, 2012).

A95. Lillis, P.G., 2012, The Chuar petroleum system revisited: American Association of Petroleum Geologists Meeting Program p. 48 (AAPG Rocky Mountain Section Meeting, September 9-11, 2012)

A96. Pearson, K., Anna, L., Whidden, K., Lillis, P.G., and Dubiel, R., 2012, Geologic model for assessment of unconventional (continuous) reservoirs of the Paradox Formation: American Association of Petroleum Geologists Meeting Program, p. 51 (AAPG Rocky Mountain Section Meeting, September 9-11, 2012)

A97. Stanley, R.G., Charpentier, R.R., Cook, T.A., Houseknecht, D.W., Klett, T.R., Lewis, K.A., Lillis, P.G., Nelson, P.H., Phillips, J.D., Pollastro,R.M., Potter, C.J., Rouse, W.A., Saltus, R.W., Schenk, C.J., Shah, A.K., Valin, Z.C.,  2012, New Estimates of Undiscovered Oil and Gas Resources in the Cook Inlet Region, South-Central Alaska: American Association of Petroleum Geologists Annual Meeting, Long Beach, CA, April 22-25, 2012.

A98. Whidden, K., Pearson, K., Anna, L., Lillis, P.G., and Dubiel, R., 2012, Assessment of undiscovered conventional oil and gas resources in the Paradox Basin, Utah, Colorado, New Mexico, and Arizona: American Association of Petroleum Geologists Meeting Program, p. 51 (AAPG Rocky Mountain Section Meeting, September 9-11, 2012).

A99. Zinniker, D.A., Mesdakom, M., Lorenson, T.D., Lillis, P.G., Magoon, L.B., Moldowan, J. M., Dahl, J.E., He, M., 2012 New techniques for recognizing and understanding high-maturity petroleum systems inCalifornia: American Association of Petroleum Geologists Annual Meeting, Long Beach, CA, April 22-25, 2012.

A100. Herriott, T.M., Wartes, M.A., Stanley, R.G., Lillis, P.G., Helmold, K.P., Decker, P.L., and Gillis, R.J., 2013, Oil-stained sandstones of the Upper Jurassic Naknek Formation and Upper Cretaceous Kaguyak Formation, Kamishak Bay area, lower Cook Inlet, Alaska: SPE Western Regional / Pacific Section AAPG Joint Technical Conference, Monterey, California, April 19-25, 2013.

A101. Lewan, M.D., Marra, K., Lillis, P.G., Higley, D.K. and Gaswirth, S., 2013, Mapping the extent and distribution of oil formation in the Upper Bakken Formation, Williston Basin: American Association of Petroleum Geologists Annual Meeting, Pittsburg, PA, May 19-22, 2013, AAPG Search and Discovery Article #90163

A102. Birdwell, J.E., Johnson, R.C., Lillis, P.G., and Brownfield, M.E., 2014, Differentiating Green River Formation oils sourced from freshwater and saline lacustrine facies in the eastern Uinta Basin, Utah: AAPG Rocky Mountain Section Meeting, July 20-22, 2014)

A103. Lillis, P.G., and Cumming, V.M., Correlation of oils and tar sands in the Green River Petroleum System, Uinta Basin, Utah: AAPG Rocky Mountain Section Meeting, July 20-22, 2014).