Browsing by Subject "facies"
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Item Characterization of Facies and Permeability Patterns in Carbonate Reservoirs Based in Outcrop Analogs(1992) Kerans, C. (Charles), 1954-; Lucia, F. Jerry; Senger, Rainer K.; Fogg, Graham E.; Nance, Hardie Seay, 1948-; Hovorka, Susan D.More than 13 billion barrels (Bbbl) of mobile oil and 17 Bbbl of residual oil will remain in San Andres and Grayburg reservoirs at abandonment under current development practices. Through the development and application of new recovery technology, a large part of this resource can be recovered. This report focuses on research for the development and testing of new techniques for improving the recovery of this resource. Outcrop and subsurface geologic and engineering data are utilized to develop new methodologies through the integration of geologic observations and engineering data for improving numerical models that predict reservoir performance more accurately. Extensive regional mapping of the 14-mile by 1,200-foot San Andres outcrop, located on the Algerita Escarpment, Guadalupe Mountains, New Mexico, demonstrates that the San Andres carbonate-ramp complex is composed of multiple depositional sequences that have significant basinward shifts in reservoir-quality facies tracts occurring across sequence boundaries. Detailed geologic and petrophysical mapping of three reservoir-quality facies tracts demonstrates that the fundamental scale of geologic description for reservoir characterization is the parasequence and its component rock-fabric-based facies. Descriptions of cores from the Seminole San Andres Unit illustrate that the parasequence is also the fundamental geologic scale for reservoir mapping in the subsurface.Item Characterization of Facies and Permeability Patterns in Carbonate Reservoirs Based on Outcrop Analogs(1993) Kerans, C. (Charles), 1954-; Lucia, F. Jerry; Senger, Rainer K.More than 13 billion barrels (Bbbl) of mobile oil and 17 Bbbl of residual oil will remain in the San Andres and Grayburg reservoir at abandonment under current development practices. Through the development and application of new recovery technology, a large part of this resource can be recovered. This report focuses on research for the development and testing of new techniques for improving recovery of this resource. Outcrop and subsurface geologic and engineering data are utilized to develop new methodologies through the integration of geologic observations and engineering data for improving numerical models that predict reservoir performance more accurately. Extensive regional mapping of the 14-mile by 1,200-foot San Andres outcrop, located on the Algerita Escarpment, Guadalupe Mountains, New Mexico, demonstrates that the San Andres carbonate-ramp complex is composed of multiple depositional sequences that have significant basinward shifts in reservoir-quality facies tracts occurring across sequence boundaries. Detailed geologic and petrophysical mapping of three reservoir-quality facies tracts demonstrates that the fundamental scale of geologic description for reservoir characterization is the parasequence and its component rock-fabric-based facies. Descriptions of cores from the Seminole San Andres Unit illustrate that the parasequence is also the fundamental geologic scale for reservoir mapping in the subsurface.Item Consolidation of Geologic Studies of Geopressured-Geothermal Resources in Texas: Barrier-Bar Tidal-Channel Reservoir Facies Architecture, Jackson Group, Prado Field, South Texas(1993) Seni, Steven J.; Choh, Suk-JooSandstone reservoirs in the Jackson barrier/strandplain play are characterized by low recovery efficiencies and thus contain a large hydrocarbon resource target potentially amenable to advanced recovery techniques. Prado field, Jim Hogg County, South Texas, has produced over 23 million barrels of oil and over 32 million cubic feet of gas from combination structural-stratigraphic traps in the Eocene lower Jackson Group. Hydrocarbon entrapment at Prado field is a result of anticlinal nosing by differential compaction and updip pinch-out of barrier bar sandstone. Relative base-level lowering resulted in forced regression that established lower Jackson shoreline sandstones in a relatively distal location in central Jim Hogg County. Reservoir sand bodies at Prado field comprise complex assemblages of barrier-bar, tidal-inlet fill, back-barrier bar, and shoreface environments. Subsequent progradation built the barrier-bar system seaward 1 to 2 miles. Within the barrier-bar system, favorable targets for hydrocarbon reexploration are concentrated in tidal-inlet facies because they possess the greatest degree of depositional heterogeneity.Item Facies Architecture of Submarine Channel-Levee and Lobe Sandstones: Permian Bell Canyon Formation, Delaware Mountains, West Texas(1997) Barton, Mark D.The Bureau of Economic Geology at The University of Texas at Austin recently conducted an outcrop characterization study of Bell Canyon exposures as part of a reservoir characterization project funded by the U.S. Department of Energy (DOE). The project focused on slope and basin elastic reservoirs of the Delaware Mountain Group of West Texas and Southeast New Mexico reservoirs because of the significant resources they contain and the complex internal architecture and distribution of petrophysical properties they display. The outcrops were examined to provide unambiguous and high-resolution information on sandstone body and seal architecture. In addition to the outcrop study, the project involved field studies of two Delaware Mountain Group reservoirs (Geraldine Ford and Ford West), a 3-D seismic survey, a petrophysical study of the Ramsey Sandstone within the Geraldine Ford field, and a reservoir simulation within a portion of the Geraldine Ford field. On this trip, we will visit exposures of the Bell Canyon Formation that were deposited in the deepwater Delaware Basin during the late Permian. The origin of these sandstones has been a source of controversy, with depositional interpretations ranging from contourites, turbidity current deposits, and saline density currents deposits. Our outcrop study focuses on a stratigraphic unit in the Bell Canyon Formation that is analogous to the highly productive Ramsey Sandstone. This unit shows complex stacking patterns and facies changes that are related to the progradation and retrogradation of a system of channel levees and attached lobes. The guidebook provides most of the geological background necessary for this trip as well as data (maps, photographs, logs, and cross-sections) and discussions relevant to each field trip stop. Issues to be addressed will include the recognition and correlation of key surfaces, the distribution of facies, and processes responsible for how the sandstones were deposited.Item Letter to B.W. Blanpied from H.B. Stenzel on 1939-06-15(1939-06-15) Stenzel, Henryk B.Item Letter to Fedrico Bonet from H.B. Stenzel on 1968-04-25(1968-04-25) Stenzel, Henryk B.Item Letter to H.B. Stenzel from Curt Teichert on 1967-12-18(1967-12-18) Teichert, CurtItem Letter to H.B. Stenzel from S.M. Herrick on 1966-12-27(1966-12-27) Herrick, S.M.Item Letter to J.P.D. Hull from James A. Waters on 1944-03-04(1944-03-04) Waters, James A.Item Letter to Rolf F. Rutsch from H.B. Stenzel on 1961-12-26(1961-12-26) Stenzel, Henryk B.Item Letter to Tom Freeman from H.B. Stenzel on 1964-02-05(1964-02-05) Stenzel, Henryk B.Item Letter to W.S. Adkins from H.B. Stenzel on 1952-09-10(1952-09-10) Stenzel, Henryk B.Item Plio-Pleistocene Depositional Sequences of the Southwestern Louisiana Continental Shelf and Slope: Geologic Framework, Sedimentary Facies and Hydrocarbon Distribution(1991) Morton, Robert A.; Ayers, Jr., W. B.The Plio-Pleistocene hydrocarbon fairway of offshore Louisiana is restricted to the outer continental shelf and upper continental slope where a thick wedge of nearshore and deep marine sediments was deposited. Electric logs, paleontological reports, and seismic profiles form the basis for (1) dividing the wedge of Plio-Pleistocene strata into eight genetic sequences, (2) establishing the structural framework, (3) determining the timing of deformation, and (4) mapping the principal depositional systems of the West Cameron and western Garden Banks areas during the past five million years. Sedimentary facies and structural styles in this part of the Gulf Coast basin are highly variable owing to contemporaneous sea-level fluctuations, salt migration, and shifting sites of deltaic, shelf, and slope sedimentation. The resulting complex geologic history of this part of the basin was interpreted to determine what controlled the generation, migration, and entrapment of hydrocarbons. The early Pliocene was a period of continental platform inundation and deposition of a thick succession of marine mudstones. About 3 million years ago, this monotonous accumulation of deep-water mudstone was interrupted by deposition of sand-rich submarine channels and fans associated with a lowering of sea level. These lowstand deposits extended at least 55 miles (90 km) basinward of the paleomargin. Overlying Pleistocene sediments were deposited mainly by prograding mud-rich fluvial-deltaic systems of moderate size. These rivers and shelf-edge deltas constructed a broad continental platform that buried the submarine fans and prograded the shelf margin approximately 70 miles (110 km) basinward. During this rapid outbuilding, slumping and other gravity-driven mass transport processes removed sand-rich delta-front sediments from unstable shelf margins and redeposited them on the continental slope.