Portrait of a Basin-Floor Fan for Sandy Deepwater Systems, Permian Lower Brushy Canyon Formation, West Texas
Mary Carr, Michael H. Gardner, 2000. "Portrait of a Basin-Floor Fan for Sandy Deepwater Systems, Permian Lower Brushy Canyon Formation, West Texas", Fine-Grained Turbidite Systems, Arnold H. Bouma, Charles G. Stone
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The architecture of basin-floor deposits from unconfined flows, showing bed compensation and nonunique bed patterns, is stratigraphic in origin. Stratigraphic forcing is demonstrated in an upward coarsening succession of layered sheet sandstones that encase isolated distributary channel complexes deposited 30 km from a physiographic margin. This 70-m-thick basin-floor succession contains three fourth-order cycles that show organized changes in sediment body type, bed thickness, facies proportion, and percentage of sand. Siltstone-dominated Fan 1 (8% sandstone) drapes but incompletely fills underlying paleotopography. Layered sandstone sheets (~75%, 0.59-m-thick bed sets) dominate Fan 2 (93% sandstone) and encase the only channel-flanking wedge (~7.4%) and channelform (~7.35%) elements. Amalgamated sandstone sheets (~99%, 0.80-m-thick sandstone bed sets) dominate Fan 3 (87% sandstone) with minor channelform elements (0.3%).
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This Memoir covers one of the most important and active exploration reservoirs being pursued by geoscientists worldwide: fine-grained turbidite systems. 28 chapters show the results of an intense research effort in the 1990s that resulted from the discovery of large hydrocarbon accumulations in fine-grained turbidite systems in Brazil, the Gulf of Mexico, West Africa, and the North Sea. Industry and academia have joined together in this publication and the result is a unique opportunity to study these turbidite systems from the outcrop to the modeling; through the interpretation with 2-D and 3-D seismic data; to case histories and analog studies from Arkansas and Oklahoma, South and West Africa, Gulf of Mexico, west Texas, and New Zealand.