Sequence stratigraphic controls on reservoir compartmentalization, hydrocarbon distribution and optimization of field development process: Vicksburg trend, South Texas, U.S.A.
We have utilized integrated core facies, well log and 3-D Seismic Sequence stratigraphy and production history of the Vicksburg Formation to understand reservoir distribution, optimized field development, and guide field management processes. In South Texas area, up to 4000 feet of the Oligocene Vicksburg strata are preserved as rollover anticlines and their associated antithetic and synthetic faults. This stratal configuration resulted from syndepositional movement of the expanded Vicksburg strata along a composite decollement surface on top of the underlying Eocene Jackson shale. These strata were, thus, developed in a high-accommodation depositional setting controlled by a complex interaction between eustatic fluctuations and syndepositional listric normal fault movement. The Vicksburg Formation is marked by a distinctive hierarchy of sequence stacking and an orderly and predictive pattern of lateral sequence distribution. It can be characterized as a super sequence composed of lowstand, transgressive, and highstand composite sequence sets. The sequence sets, in turn, contain numerous high-frequency sequences. The high-frequency sequences range from 50-100 feet in thickness and, largely due to high accommodation potential, are dominated by sandy and often gas-bearing lowstand and mud-prone transgressive systems tract parasequences of deltaic and shoreface to offshore origin, respectively. Lateral patterns of reservoir facies, geometry, and quality are profoundly controlled by the structural positions of strata within the rollover sedimentary wedges and/or proximity to syndepositional faults. Reservoirs are thicker, sandier and of patter quality in down flank, away from crestal rollover, or proximal direction. During development of late lowstand to transgressive composite sequence sets the older Vicksburg depocenters; were retrogradationally displaced in landward direction across the lop of the underlying Jackson Shale.
- OSTI ID:
- 425813
- Report Number(s):
- CONF-960527-; TRN: 96:004994-0454
- Resource Relation:
- Conference: Annual convention of the American Association of Petroleum Geologists, Inc. and the Society for Sedimentary Geology: global exploration and geotechnology, San Diego, CA (United States), 19-22 May 1996; Other Information: PBD: 1996; Related Information: Is Part Of 1996 AAPG annual convention. Volume 5; PB: 231 p.
- Country of Publication:
- United States
- Language:
- English
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