Facies and stratigraphy of the San Andres formation, northern and northwestern shelves of the Midland basin, Texas and New Mexico

Journal Article · Fri Jan 01 00:00:00 EST 1982 · Rep. Invest., Univ. Tex. Austin, Bur. Econ. Geol.; (United States)

OSTI ID:5743506

Ramondetta, P J; Guetzow, D D; Dauzat, R; Merritt, R; Garza, J

The San Andres Formation on the Northern and Northwestern shelves of the Midland Basin is a progradational stratigraphic unit consisting predominantly of carbonate facies. Lithofacies include dolomite, laminated anhydrite and dolomite, massive bedded anhydrite, limestone, salt, and red beds. These lithofacies represent depositional environments that include deep-water outer shelf, shallow-water inner shelf, shallow-water to emergent shoals, and a sabkha complex that comprises intertidal to supratidal algal mud flats, hypersaline lagoons or brine pans, and terrigenous mud flats. Deposition was cyclic; a cycle began with a transgression followed by a gradual shoaling-upward sequence. Cycles commonly terminated with subaerial exposure before renewed transgression initiated a new cycle. Much of the dolomitization probably occurred during periods of subaerial exposure in schizohaline environments. Porosity probably was developed also during subaerial exposure. San Andres reservoirs of the Northern and Northwestern shelves yielded 12.7% of the total oil production for Texas in 1980. Trapping mechanisms are both structural and stratigraphic. 44 references.

• OSTI ID: 5743506
• Journal Information: Rep. Invest., Univ. Tex. Austin, Bur. Econ. Geol.; (United States), Vol. 128
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
NEW MEXICO
RESERVOIR ROCK
DEPOSITION
GEOLOGIC HISTORY
STRATIGRAPHY
TEXAS
DOLOMITE
GEOLOGIC FORMATIONS
GEOLOGIC TRAPS
LIMESTONE
LITHOLOGY
PETROLEUM DEPOSITS
POROSITY
PRODUCTION
SALT DEPOSITS
ALKALINE EARTH METAL COMPOUNDS
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CARBON COMPOUNDS
CARBONATE MINERALS
CARBONATE ROCKS
CARBONATES
FEDERAL REGION VI
GEOLOGIC DEPOSITS
GEOLOGY
MAGNESIUM CARBONATES
MAGNESIUM COMPOUNDS
MINERAL RESOURCES
MINERALS
NORTH AMERICA
OXYGEN COMPOUNDS
RESOURCES
ROCKS
SEDIMENTARY ROCKS
USA
020200* - Petroleum- Reserves
Geology
& Exploration