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Resurgence of Previous HitSaltNext Hit Previous HitDomeNext Hit Exploration in the Gulf Coast Mesozoic Basins in Texas, Louisiana, and Mississippi

J. R. Turner1, C. E. Gray2, and N. B. Pollard3
1Barrow-Shaver Resources Company, Tyler, TX
2EOG Resources, Tyler, TX
3CW Resources, Longview, TX

There has been a resurgence of Previous HitsaltNext Hit Previous HitdomeNext Hit exploration in the Mesozoic basins of the Gulf Coast in the last five years. The renewed interest in Previous HitsaltNext Hit Previous HitdomeNext Hit prospecting is driven by a reinterpretation of Previous HitsaltNext Hit Previous HitdomeNext Hit morphology and advancements in reflection seismology.

Previous HitSaltNext Hit domes were originally drilled on their crests at shallow depths, and the flanks were largely ignored. The domes were thought to have grown during Tertiary time, breeching the deeper traps. It was also thought that the Previous HitsaltNext Hit stock was large and limited the extent of upturned beds beneath the Previous HitdomeNext Hit overhang.

However, recent drilling has confirmed that the domes have episodic growth, complex faulting, and multiple unconformities. If porous and permeable beds surround the Previous HitdomeNext Hit, oil and gas may accumulate in unconformity traps, in down-to-the-Previous HitdomeNext Hit fault traps, and in unturned beds sealed against the Previous HitsaltNext Hit stock or overhang base. Since the Previous HitsaltNext Hit stock is small in comparison to the overhang, many of these traps exist beneath the Previous HitsaltNext Hit cover, and remain undiscovered.

Several oil and gas operators currently have plans to drill Previous HitsaltNext Hit Previous HitdomeNext Hit prospects in East Texas, North Louisiana, and Mississippi. Some prospects are based solely on well control, while others rely on sophisticated seismic imaging. All of the prospects require drilling through an extensive thickness of Previous HitsaltNext Hit to explore for reserves that remain hidden beneath the Previous HitsaltTop cover.

AAPG Search and Discovery Article #90901©2001 GCAGS, Annual Meeting, Shreveport, Louisiana