Carrizo-upper Wilcox depositional systems and their relation to updip oil production in South Texas

Journal Article · Sun May 01 00:00:00 EDT 1983 · Bull. South Tex. Geol. Soc.; (United States)

OSTI ID:6144213

Hamlin, H S

In the Rio Grande embayment of S. Texas, the Carrizo-Upper Wilcox interval consists of 2 fluvial- coastal plain depositional systems that grade downdip into several deltaic complexes. The bedload channel system is dominated by laterally coalesced, stacked fluvial channel sandstones. Shales are minor and laterally discontinuous. The mixed alluvial system consists of a more typical suite of coastal plain facies. Channel sandstones tend to be isolated and surrounded by overbank shales. Total-interval isopach patterns, sandstone geometries, and facies distributions indicate that fluvial systems were converging upon the embayment from the west, northwest, and north. Petroleum production in the updip portion of the Carrizo-Upper Wilcox interval is influenced by the distribution of the depositional systems and their component facies. Although most of the traps are structural, the geometries and internal characteristics of the reservoir sandstones are facies-dependent and affect field size and quality.

• OSTI ID: 6144213
• Journal Information: Bull. South Tex. Geol. Soc.; (United States), Vol. 23:9
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
TEXAS
GEOLOGIC FORMATIONS
PETROLEUM DEPOSITS
STRATIGRAPHY
GEOLOGIC TRAPS
SANDSTONES
SEDIMENTARY BASINS
SHALES
SPATIAL DISTRIBUTION
DISTRIBUTION
FEDERAL REGION VI
GEOLOGIC DEPOSITS
GEOLOGIC STRUCTURES
GEOLOGY
MINERAL RESOURCES
NORTH AMERICA
RESOURCES
ROCKS
SEDIMENTARY ROCKS
USA
020200* - Petroleum- Reserves
Geology
& Exploration