Paul Lillis
Scientist Emeritus with the Central Energy Resources Science Center
Paul Lillis is a recently retired 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.\
Science and Products
Filter Total Items: 68
Migrated hydrocarbons in exposure of Maastrichtian nonmarine strata near Saddle Mountain, lower Cook Inlet, Alaska
Magoon and others (1980) described an 83-meter- (272-foot-) thick succession of Maastrichtian (Upper Cretaceous)
conglomerate, sandstone, mudstone, and coal exposed on the south side of an unnamed drainage, approximately 3 kilometers
(1.8 miles) east of Saddle Mountain in lower Cook Inlet (figs. 1 and 2). The initial significance of this exposure was that
it was the first reported occurrence of no
Authors
D. L. LePain, P. G. Lillis, K. P. Helmold, R. G. Stanley
Evaluating Re-Os systematics in organic-rich sedimentary rocks in response to petroleum generation using hydrous pyrolysis experiments
Successful application of the 187Re–187Os geochronometer has enabled the determination of accurate and precise depositional ages for organic-rich sedimentary rocks (ORS) as well as establishing timing constraints of petroleum generation. However, we do not fully understand the systematics and transfer behaviour of Re and Os between ORS and petroleum products (e.g., bitumen and oil). To more fully
Authors
A.D. Rooney, D. Selby, M. D. Lewan, P. G. Lillis, J.-P. Houzay
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
Two oil families in Ordovician reservoirs from the cratonic region of the Tarim Basin are distinguished by the distribution of regular steranes, triaromatic steroids, norcholestanes and dinosteroids. Oils with relatively lower contents of C28 regular steranes, C26 20S, C26 20R + C27 20S and C27 20R regular triaromatic steroids, dinosteranes, 24-norcholestanes and triaromatic dinosteroids originate
Authors
Meijun Li, T.-G. Wang, Paul G. Lillis, Chunjiang Wang, Shengbao Shi
Assessment of undiscovered oil and gas resources of the Cook Inlet region, south-central Alaska, 2011
The U.S. Geological Survey (USGS) recently completed a new assessment of undiscovered, technically recoverable oil and gas resources in the Cook Inlet region of south-central Alaska. Using a geology-based assessment methodology, the USGS estimates that mean undiscovered volumes of nearly 600 million barrels of oil, about 19 trillion cubic feet of natural gas, and 46 million barrels of natural gas
Authors
Richard G. Stanley, Ronald R. Charpentier, Troy A. Cook, David W. Houseknecht, Timothy R. Klett, Kristen A. Lewis, Paul G. Lillis, Philip H. Nelson, Jeffrey D. Phillips, Richard M. Pollastro, Christopher J. Potter, William A. Rouse, Richard W. Saltus, Christopher J. Schenk, Anjana K. Shah, Zenon C. Valin
Geology and undiscovered oil and gas resources in the Madison Group, Williston Basin, North Dakota and Montana
Two of the total petroleum systems (TPS) defined as part of the U.S. Geological Survey (USGS) assessment of the Williston Basin contain Mississippian Madison Group strata: 1) the Bakken-Lodgepole TPS, which includes the Lodgepole Formation; and 2) the Madison TPS, which includes the Mission Canyon, Charles, and Spearfish formations. The Bakken-Lodgepole TPS is defined as the area in which oil gene
Authors
Stephanie B. Gaswirth, Paul G. Lillis, Richard M. Pollastro, Lawrence O. Anna
Petroleum systems used to determine the assessment units in the San Joaquin Basin Province, California
For the San Joaquin Basin Province in California (fig. 8.1), six petroleum systems were identified, mapped, and described to provide the basis for the five total petroleum systems (TPS) and ten related assessment units (AU) used in the 2003 U.S. Geological Survey (USGS) National Oil and Gas Assessment (table 8.1; Gautier and others, 2004; Hosford Scheirer, 2007). The petroleum pools in the provinc
Authors
Leslie B. Magoon, Paul G. Lillis, Kenneth E. Peters
Assessment of undiscovered oil and gas resources of the Williston Basin Province of North Dakota, Montana, and South Dakota, 2008
Using a geology-based assessment method, the U.S. Geological Survey estimated mean undiscovered volumes of 3.8 billion barrels of undiscovered oil, 3.7 trillion cubic feet of associated/dissolved natural gas, and 0.2 billion barrels of undiscovered natural gas liquids in the Williston Basin Province, North Dakota, Montana, and South Dakota. (See “Introduction” in Fact Sheet for additional informat
Authors
Lawrence O. Anna, Richard M. Pollastro, Stephanie B. Gaswirth, Michael D. Lewan, Paul G. Lillis, Laura N.R. Roberts, Christopher J. Schenk, Ronald R. Charpentier, Troy A. Cook, Timothy R. Klett
Gas shale in the Rocky Mountains and beyond
This guidebook includes papers on various aspects of resource evaluation, exploration, petrophysics, reservoir potential, well deliverability and drilling and completion technology. As new shale plays are explored for and developed, it is important to learn from analogs and case histories, including those from outside the Rocky Mountain region. While the emphasis is on natural gas, we realize ther
Update on North America shale-gas exploration and development
No abstract available.
Authors
David G. Hill, John B. Curtis, Paul G. Lillis
Origin, conditions, and timing of gas generation in the Lewis Shale, San Juan Basin, New Mexico
No abstract available.
Authors
Neil S. Fishman, Thomas Parris, Donald L. Hall, Paul G. Lillis, Mark J. Pawlewicz
Assessment of undiscovered oil and gas resources of the Bighorn Basin Province, Wyoming and Montana, 2008
Using a geology-based assessment methodology, the U.S. Geological Survey estimated a mean of 989 billion cubic feet of undiscovered natural gas, a mean of 72 million barrels of undiscovered oil, and a mean of 13 million barrels of undiscovered natural gas liquids in the Bighorn Basin Providence of Wyoming and Montana.
Authors
Mark A. Kirschbaum, Steven M. Condon, Thomas M. Finn, Ronald C. Johnson, Paul G. Lillis, Philip H. Nelson, Laura N.R. Roberts, Stephen B. Roberts, Ronald Charpentier, Troy Cook, Timothy R. Klett, Richard M. Pollastro, Christopher J. Schenk
Assessment of undiscovered biogenic gas resources, North-central Montana Province
Application of a geology-based assessment methodology by the U.S. Geological Survey resulted in an estimated mean of 6,192 billion cubic feet of shallow biogenic (continuous) undiscovered gas in the North-Central Montana Province. Oil, gas, and natural gas liquids in conventional accumulations were not assessed.
Authors
Jennie L. Ridgley, Lawrence O. Anna, Steven M. Condon, Neil S. Fishman, Timothy C. Hester, Paul G. Lillis, Elisabeth L. Rowan, Ronald Charpentier, Troy A. Cook, Robert A. Crovelli, Timothy R. Klett, Christopher J. Schenk
Science and Products
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Filter Total Items: 68
Migrated hydrocarbons in exposure of Maastrichtian nonmarine strata near Saddle Mountain, lower Cook Inlet, Alaska
Magoon and others (1980) described an 83-meter- (272-foot-) thick succession of Maastrichtian (Upper Cretaceous) conglomerate, sandstone, mudstone, and coal exposed on the south side of an unnamed drainage, approximately 3 kilometers (1.8 miles) east of Saddle Mountain in lower Cook Inlet (figs. 1 and 2). The initial significance of this exposure was that it was the first reported occurrence of noAuthorsD. L. LePain, P. G. Lillis, K. P. Helmold, R. G. StanleyEvaluating Re-Os systematics in organic-rich sedimentary rocks in response to petroleum generation using hydrous pyrolysis experiments
Successful application of the 187Re–187Os geochronometer has enabled the determination of accurate and precise depositional ages for organic-rich sedimentary rocks (ORS) as well as establishing timing constraints of petroleum generation. However, we do not fully understand the systematics and transfer behaviour of Re and Os between ORS and petroleum products (e.g., bitumen and oil). To more fullyAuthorsA.D. Rooney, D. Selby, M. D. Lewan, P. G. Lillis, J.-P. HouzayThe 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
Two oil families in Ordovician reservoirs from the cratonic region of the Tarim Basin are distinguished by the distribution of regular steranes, triaromatic steroids, norcholestanes and dinosteroids. Oils with relatively lower contents of C28 regular steranes, C26 20S, C26 20R + C27 20S and C27 20R regular triaromatic steroids, dinosteranes, 24-norcholestanes and triaromatic dinosteroids originateAuthorsMeijun Li, T.-G. Wang, Paul G. Lillis, Chunjiang Wang, Shengbao ShiAssessment of undiscovered oil and gas resources of the Cook Inlet region, south-central Alaska, 2011
The U.S. Geological Survey (USGS) recently completed a new assessment of undiscovered, technically recoverable oil and gas resources in the Cook Inlet region of south-central Alaska. Using a geology-based assessment methodology, the USGS estimates that mean undiscovered volumes of nearly 600 million barrels of oil, about 19 trillion cubic feet of natural gas, and 46 million barrels of natural gasAuthorsRichard G. Stanley, Ronald R. Charpentier, Troy A. Cook, David W. Houseknecht, Timothy R. Klett, Kristen A. Lewis, Paul G. Lillis, Philip H. Nelson, Jeffrey D. Phillips, Richard M. Pollastro, Christopher J. Potter, William A. Rouse, Richard W. Saltus, Christopher J. Schenk, Anjana K. Shah, Zenon C. ValinGeology and undiscovered oil and gas resources in the Madison Group, Williston Basin, North Dakota and Montana
Two of the total petroleum systems (TPS) defined as part of the U.S. Geological Survey (USGS) assessment of the Williston Basin contain Mississippian Madison Group strata: 1) the Bakken-Lodgepole TPS, which includes the Lodgepole Formation; and 2) the Madison TPS, which includes the Mission Canyon, Charles, and Spearfish formations. The Bakken-Lodgepole TPS is defined as the area in which oil geneAuthorsStephanie B. Gaswirth, Paul G. Lillis, Richard M. Pollastro, Lawrence O. AnnaPetroleum systems used to determine the assessment units in the San Joaquin Basin Province, California
For the San Joaquin Basin Province in California (fig. 8.1), six petroleum systems were identified, mapped, and described to provide the basis for the five total petroleum systems (TPS) and ten related assessment units (AU) used in the 2003 U.S. Geological Survey (USGS) National Oil and Gas Assessment (table 8.1; Gautier and others, 2004; Hosford Scheirer, 2007). The petroleum pools in the provincAuthorsLeslie B. Magoon, Paul G. Lillis, Kenneth E. PetersAssessment of undiscovered oil and gas resources of the Williston Basin Province of North Dakota, Montana, and South Dakota, 2008
Using a geology-based assessment method, the U.S. Geological Survey estimated mean undiscovered volumes of 3.8 billion barrels of undiscovered oil, 3.7 trillion cubic feet of associated/dissolved natural gas, and 0.2 billion barrels of undiscovered natural gas liquids in the Williston Basin Province, North Dakota, Montana, and South Dakota. (See “Introduction” in Fact Sheet for additional informatAuthorsLawrence O. Anna, Richard M. Pollastro, Stephanie B. Gaswirth, Michael D. Lewan, Paul G. Lillis, Laura N.R. Roberts, Christopher J. Schenk, Ronald R. Charpentier, Troy A. Cook, Timothy R. KlettGas shale in the Rocky Mountains and beyond
This guidebook includes papers on various aspects of resource evaluation, exploration, petrophysics, reservoir potential, well deliverability and drilling and completion technology. As new shale plays are explored for and developed, it is important to learn from analogs and case histories, including those from outside the Rocky Mountain region. While the emphasis is on natural gas, we realize therUpdate on North America shale-gas exploration and development
No abstract available.AuthorsDavid G. Hill, John B. Curtis, Paul G. LillisOrigin, conditions, and timing of gas generation in the Lewis Shale, San Juan Basin, New Mexico
No abstract available.AuthorsNeil S. Fishman, Thomas Parris, Donald L. Hall, Paul G. Lillis, Mark J. PawlewiczAssessment of undiscovered oil and gas resources of the Bighorn Basin Province, Wyoming and Montana, 2008
Using a geology-based assessment methodology, the U.S. Geological Survey estimated a mean of 989 billion cubic feet of undiscovered natural gas, a mean of 72 million barrels of undiscovered oil, and a mean of 13 million barrels of undiscovered natural gas liquids in the Bighorn Basin Providence of Wyoming and Montana.AuthorsMark A. Kirschbaum, Steven M. Condon, Thomas M. Finn, Ronald C. Johnson, Paul G. Lillis, Philip H. Nelson, Laura N.R. Roberts, Stephen B. Roberts, Ronald Charpentier, Troy Cook, Timothy R. Klett, Richard M. Pollastro, Christopher J. SchenkAssessment of undiscovered biogenic gas resources, North-central Montana Province
Application of a geology-based assessment methodology by the U.S. Geological Survey resulted in an estimated mean of 6,192 billion cubic feet of shallow biogenic (continuous) undiscovered gas in the North-Central Montana Province. Oil, gas, and natural gas liquids in conventional accumulations were not assessed.AuthorsJennie L. Ridgley, Lawrence O. Anna, Steven M. Condon, Neil S. Fishman, Timothy C. Hester, Paul G. Lillis, Elisabeth L. Rowan, Ronald Charpentier, Troy A. Cook, Robert A. Crovelli, Timothy R. Klett, Christopher J. Schenk