Christopher J Schenk
Research geologist with the Central Energy Resources Science Center.
Science and Products
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Facies composition calculated from the sonic, neutron, and density log suite, upper part of the Minnelusa Formation, Powder River basin, Wyoming Facies composition calculated from the sonic, neutron, and density log suite, upper part of the Minnelusa Formation, Powder River basin, Wyoming
Sandstones and dolomites of the Permian upper part of the Minnelusa Formation are treated here as four-component systems consisting of fluid-filled pore space, quartz, dolomite, and anhydrite. Response equations of sonic, neutron, and density logs form a system of four simultaneous equations. With four equations and four unknowns, the composition of upper Minnelusa facies is defined by...
Authors
J. W. Schmoker, Christopher J. Schenk
Pin stripe lamination: A distinctive feature of modern and ancient eolian sediments Pin stripe lamination: A distinctive feature of modern and ancient eolian sediments
Pin stripe laminations are a distinctive feature of modern and ancient eolian sediments. In sets of eolian ripple (or translatent) strata they represent deposition of silt and very fine sand in the troughs of the advancing wind ripples. In sets of avalanche strata they probably result from the downward settling of fine sand and silt within the moving avalanche to the interface of moving...
Authors
S.G. Fryberger, Christopher J. Schenk
Early diagenesis of eolian dune and interdune sands at White Sands, New Mexico Early diagenesis of eolian dune and interdune sands at White Sands, New Mexico
The degree of early diagenesis in eolian dune and interdune sands at White Sands, New Mexico, is largely a function of the relationship between sand location and the water table. Most active and vegetation-stabilized dune sands are in the vadose zone, whereas interdune sands are in the capillary fringe and phreatic zones. Crystallographically controlled dissolution of the framework...
Authors
Christopher J. Schenk, S.G. Fryberger
Sedimentology and paleogeographic significance of six fluvial sandstone bodies in the Maroon Formation, Eagle Basin, northwest Colorado. Sedimentology of an Eolian sandstone from the Middle Pennsylvanian Eagle Valley Evaporite, Eagle Basin, northwest Col Sedimentology and paleogeographic significance of six fluvial sandstone bodies in the Maroon Formation, Eagle Basin, northwest Colorado. Sedimentology of an Eolian sandstone from the Middle Pennsylvanian Eagle Valley Evaporite, Eagle Basin, northwest Col
No abstract available.
Authors
S. Y. Johnson, Christopher J. Schenk, V. F. Nuccio
Primary textures in experimentally formed oolite cross-strata Primary textures in experimentally formed oolite cross-strata
No abstract available.
Authors
Christopher J. Schenk
Field guide and road log: Pennsylvanian and Permian depositional systems and cycles in the Eagle basin, northwestern Colorado Field guide and road log: Pennsylvanian and Permian depositional systems and cycles in the Eagle basin, northwestern Colorado
No abstract available.
Authors
Christopher J. Schenk, S. Y. Johnson, J. A. Karachewski
CHARACTERIZATION OF SANDSTONE RESERVOIRS FOR ENHANCED OIL RECOVERY: THE PERMIAN UPPER MINNELUSA FORMATION, POWDER RIVER BASIN, WYOMING. CHARACTERIZATION OF SANDSTONE RESERVOIRS FOR ENHANCED OIL RECOVERY: THE PERMIAN UPPER MINNELUSA FORMATION, POWDER RIVER BASIN, WYOMING.
Upper Minnelusa sandstones form a complex group of reservoirs because of variations in regional setting, sedimentology, and diagenetic alteration. Structural lineaments separate the reservoirs into northern and southern zones. Production in the north is from a single pay sand, and in the south from multi-pay sands due to differential erosion on top of the Upper Minnelusa. The...
Authors
Christopher J. Schenk, J. W. Schmoker, J.M. Scheffler
Summary of vitrinite reflectance and rock-eval pyrolysis data, Eagle Basin, northwestern Colorado Summary of vitrinite reflectance and rock-eval pyrolysis data, Eagle Basin, northwestern Colorado
No abstract available.
Authors
V. F. Nuccio, Christopher J. Schenk, T.A. Daws
Recognition of interstitial anhydrite dissolution: A cause of secondary porosity, San Andres limestone, New Mexico, and Upper Minnelusa Formation, Wyoming Recognition of interstitial anhydrite dissolution: A cause of secondary porosity, San Andres limestone, New Mexico, and Upper Minnelusa Formation, Wyoming
Rectangular and stair-step pore reentrants in carbonate mudstones have been recognized previously as indirect evidence for anhydrite dissolution. In this study, direct evidence for subsurface dissolution of interstitial anhydrite in both dolomite grainstones and quartz sandstones includes: (1) cleavage-related dissolution fringe on anhydrite crystal surfaces, and (2) isolated remnants of...
Authors
Christopher J. Schenk, Randall W. Richardson
ESTIMATE OF WORLD HEAVY CRUDE OIL AND NATURAL BITUMEN RESOURCES. ESTIMATE OF WORLD HEAVY CRUDE OIL AND NATURAL BITUMEN RESOURCES.
The quantity of heavy hydrocarbons - heavy crude oil and natural bitumens - known or surmised to be present in the earth is large. The total is estimated to fall in the range of 5,879,712-5,942,139 million barrels. The portion of this that may ultimately prove recoverable is small, perhaps on the order of 500,000 million barrels of heavy crude oil and 200,000 million barrels of bitumen.
Authors
Richard F. Meyer, Christopher J. Schenk
Science and Products
Filter Total Items: 57
Filter Total Items: 57
No Result Found
Filter Total Items: 310
Facies composition calculated from the sonic, neutron, and density log suite, upper part of the Minnelusa Formation, Powder River basin, Wyoming Facies composition calculated from the sonic, neutron, and density log suite, upper part of the Minnelusa Formation, Powder River basin, Wyoming
Sandstones and dolomites of the Permian upper part of the Minnelusa Formation are treated here as four-component systems consisting of fluid-filled pore space, quartz, dolomite, and anhydrite. Response equations of sonic, neutron, and density logs form a system of four simultaneous equations. With four equations and four unknowns, the composition of upper Minnelusa facies is defined by...
Authors
J. W. Schmoker, Christopher J. Schenk
Pin stripe lamination: A distinctive feature of modern and ancient eolian sediments Pin stripe lamination: A distinctive feature of modern and ancient eolian sediments
Pin stripe laminations are a distinctive feature of modern and ancient eolian sediments. In sets of eolian ripple (or translatent) strata they represent deposition of silt and very fine sand in the troughs of the advancing wind ripples. In sets of avalanche strata they probably result from the downward settling of fine sand and silt within the moving avalanche to the interface of moving...
Authors
S.G. Fryberger, Christopher J. Schenk
Early diagenesis of eolian dune and interdune sands at White Sands, New Mexico Early diagenesis of eolian dune and interdune sands at White Sands, New Mexico
The degree of early diagenesis in eolian dune and interdune sands at White Sands, New Mexico, is largely a function of the relationship between sand location and the water table. Most active and vegetation-stabilized dune sands are in the vadose zone, whereas interdune sands are in the capillary fringe and phreatic zones. Crystallographically controlled dissolution of the framework...
Authors
Christopher J. Schenk, S.G. Fryberger
Sedimentology and paleogeographic significance of six fluvial sandstone bodies in the Maroon Formation, Eagle Basin, northwest Colorado. Sedimentology of an Eolian sandstone from the Middle Pennsylvanian Eagle Valley Evaporite, Eagle Basin, northwest Col Sedimentology and paleogeographic significance of six fluvial sandstone bodies in the Maroon Formation, Eagle Basin, northwest Colorado. Sedimentology of an Eolian sandstone from the Middle Pennsylvanian Eagle Valley Evaporite, Eagle Basin, northwest Col
No abstract available.
Authors
S. Y. Johnson, Christopher J. Schenk, V. F. Nuccio
Primary textures in experimentally formed oolite cross-strata Primary textures in experimentally formed oolite cross-strata
No abstract available.
Authors
Christopher J. Schenk
Field guide and road log: Pennsylvanian and Permian depositional systems and cycles in the Eagle basin, northwestern Colorado Field guide and road log: Pennsylvanian and Permian depositional systems and cycles in the Eagle basin, northwestern Colorado
No abstract available.
Authors
Christopher J. Schenk, S. Y. Johnson, J. A. Karachewski
CHARACTERIZATION OF SANDSTONE RESERVOIRS FOR ENHANCED OIL RECOVERY: THE PERMIAN UPPER MINNELUSA FORMATION, POWDER RIVER BASIN, WYOMING. CHARACTERIZATION OF SANDSTONE RESERVOIRS FOR ENHANCED OIL RECOVERY: THE PERMIAN UPPER MINNELUSA FORMATION, POWDER RIVER BASIN, WYOMING.
Upper Minnelusa sandstones form a complex group of reservoirs because of variations in regional setting, sedimentology, and diagenetic alteration. Structural lineaments separate the reservoirs into northern and southern zones. Production in the north is from a single pay sand, and in the south from multi-pay sands due to differential erosion on top of the Upper Minnelusa. The...
Authors
Christopher J. Schenk, J. W. Schmoker, J.M. Scheffler
Summary of vitrinite reflectance and rock-eval pyrolysis data, Eagle Basin, northwestern Colorado Summary of vitrinite reflectance and rock-eval pyrolysis data, Eagle Basin, northwestern Colorado
No abstract available.
Authors
V. F. Nuccio, Christopher J. Schenk, T.A. Daws
Recognition of interstitial anhydrite dissolution: A cause of secondary porosity, San Andres limestone, New Mexico, and Upper Minnelusa Formation, Wyoming Recognition of interstitial anhydrite dissolution: A cause of secondary porosity, San Andres limestone, New Mexico, and Upper Minnelusa Formation, Wyoming
Rectangular and stair-step pore reentrants in carbonate mudstones have been recognized previously as indirect evidence for anhydrite dissolution. In this study, direct evidence for subsurface dissolution of interstitial anhydrite in both dolomite grainstones and quartz sandstones includes: (1) cleavage-related dissolution fringe on anhydrite crystal surfaces, and (2) isolated remnants of...
Authors
Christopher J. Schenk, Randall W. Richardson
ESTIMATE OF WORLD HEAVY CRUDE OIL AND NATURAL BITUMEN RESOURCES. ESTIMATE OF WORLD HEAVY CRUDE OIL AND NATURAL BITUMEN RESOURCES.
The quantity of heavy hydrocarbons - heavy crude oil and natural bitumens - known or surmised to be present in the earth is large. The total is estimated to fall in the range of 5,879,712-5,942,139 million barrels. The portion of this that may ultimately prove recoverable is small, perhaps on the order of 500,000 million barrels of heavy crude oil and 200,000 million barrels of bitumen.
Authors
Richard F. Meyer, Christopher J. Schenk