Oil recovery in a low-permeability, wave-dominated, Cretaceous, deltaic reservoir, Big Wells (San Miguel) field, south Texas

Journal Article · Thu Oct 01 00:00:00 EDT 1987 · AAPG Bull.; (United States)

OSTI ID:7181309

Tyler, N; Gholston, J C; Ambrose, W A

The Upper Cretaceous Big Wells (San Miguel) reservoir in Dimmit and Zavala Counties, south Texas, produces from a broadly lenticular, wave-dominated deltaic sandstone encased in prodelta and shelf mudstones. An updip porosity pinch-out coincides with a gentle undulation on a uniformly gulfward-dipping monocline and forms a structurally modified stratigraphic trap. The reservoir is relatively tight and has an average porosity of 21% and average permeability of 6 md; wells require fracturing to stimulate production. Ultimate recovery, based on current production trends and technology, is projected to be 57 million bbl, or 29% of the 198 million bbl field. 24 figures, 1 table.

• Research Organization: Univ. of Texas, Austin
• OSTI ID: 7181309
• Journal Information: AAPG Bull.; (United States), Vol. 71:10
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
OIL WELLS
HYDRAULIC FRACTURING
PETROLEUM DEPOSITS
GEOLOGIC TRAPS
RESERVOIR ROCK
TEXAS
ENHANCED RECOVERY
PETROLEUM
PRODUCTION
COMMINUTION
ENERGY SOURCES
FEDERAL REGION VI
FOSSIL FUELS
FRACTURING
FUELS
GEOLOGIC DEPOSITS
MINERAL RESOURCES
NORTH AMERICA
RECOVERY
RESOURCES
USA
WELLS
020300* - Petroleum- Drilling & Production
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& Exploration