Use of One- and Two-Dimensional Cycle Analysis in Establishing High-Frequency Sequence Frameworks
Published:January 01, 1995
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Charles Kerans, 1995. "Use of One- and Two-Dimensional Cycle Analysis in Establishing High-Frequency Sequence Frameworks", Milankovitch Sea-Level Changes, Cycles and Reservoirs on Carbonate Platforms in Greenhouse and Ice-House Worlds, J.F. Read, Charles Kerans, L. James Weber, J.F. Sarg, Frank M. Wright
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The central goal of this contribution is to development new methods for describing and modeling carbonate reservoirs. This pair of exercises focuses on establishing a high-resolution sequence framework for shallow-water platform-top carbonate reservoir strata and, for these specific examples, mixed-carbonate-clastic successions. The scale of particular interest is that of several thousand feet laterally and several hundred feet vertically, a scale useful in reservoir description and modeling.
Specific topics for this discussion will be the development of a sequence stratigraphic framework that integrates observations from core, wireline logs, and outcrop analogs. This approach is similar to that applied by Van Wagoner et al (1988, 1990) for siliciclastic reservoirs. It downplays the emphasis on stratal geometry, the dominant player in seismically oriented sequence stratigraphy, putting it on par with other sequence stratigraphic tools, including cycle hierarchy, cycle stacking (both thickness and symmetry), facies proportions, and facies tract offset.
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Milankovitch Sea-Level Changes, Cycles and Reservoirs on Carbonate Platforms in Greenhouse and Ice-House Worlds
This short course is in three parts. Part 1 examines in general terms how carbonate cycles are generated on carbonate platforms, types of carbonate cycles developed, stacking patterns, margin geometries, degree of disconformity development, and briefly overview any characteristic diagenetic effects. Part 2 examines cycles and one- and two-dimensional stacking patterns, high resolution stratigraphy, and reservoir geometry on Later Permian platforms in the Permian Basin of West Texas. Part 3 examines reservoirs formed in an ice-house world during the major Carboniferous glaciation of Gondwana, using the Middle Pennsylvanian carbonates of the Giant Aneth oil field, Paradox Basin, Utah.