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

Journal Article · Thu Oct 01 04:00:00 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), Journal Name: AAPG Bull.; (United States) Vol. 71:10; ISSN AABUD
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200 -- Petroleum-- Reserves
Geology
& Exploration
020300* -- Petroleum-- Drilling & Production
COMMINUTION
ENERGY SOURCES
ENHANCED RECOVERY
FEDERAL REGION VI
FOSSIL FUELS
FRACTURING
FUELS
GEOLOGIC DEPOSITS
GEOLOGIC TRAPS
HYDRAULIC FRACTURING
MINERAL RESOURCES
NORTH AMERICA
OIL WELLS
PETROLEUM
PETROLEUM DEPOSITS
PRODUCTION
RECOVERY
RESERVOIR ROCK
RESOURCES
TEXAS
USA
WELLS