Southwestward extension of Vicksburg-Jackson shale ridge, Refugio and Aransas Counties, Texas

Conference · Sat Sep 01 04:00:00 EDT 1984 · Am. Assoc. Pet. Geol., Bull.; (United States)

OSTI ID:6297198

McCarthy, J A

Exploratory drilling in Refugio and Aransas Counties, Texas, has demonstrated that the major structural axis of the Vicksburg-Jackson shale ridge, which was first identified in north-central Calhoun County, Texas, plunges southwestward in the subsurface across northeastern Refugio County into northern Aransas County. The length of the shale ridge is approximately 52 mi (84 km), extending southwestward from Lavaca Bay in Calhoun County to Copano Bay in Aransas County, Texas. The southwestern limb of this regional structure is not as strongly uplifted in the subsurface of Refugio and Aransas Counties as it is in north-central Calhoun County. The structural characteristics of the ridge are steep dip to the southeast in the upper-Frio, lower Frio unconformities associated with dip reversal to the north-northwest in the lower Frio section, and up-to-the-coast faulting. Oil and gas discoveries in recent years along the southwestern extension of the shale ridge have been from structures similar to those found along the shale ridge in north-central Calhoun County. Two of the discoveries have ben significant; additional exploration along the shale ridge should identify other drillable anomalies.

• Research Organization: Cavalla Energy Exploration Co., Houston, TX
• OSTI ID: 6297198
• Report Number(s): CONF-8410143-
• Conference Information: Journal Name: Am. Assoc. Pet. Geol., Bull.; (United States) Journal Volume: 68:9
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
03 NATURAL GAS
030200 -- Natural Gas-- Reserves
Geology
& Exploration
DRILLING
EXPLORATION
FEDERAL REGION VI
GEOLOGIC DEPOSITS
GEOLOGIC STRUCTURES
MINERAL RESOURCES
NATURAL GAS DEPOSITS
NORTH AMERICA
PETROLEUM DEPOSITS
RESOURCES
ROCKS
SEDIMENTARY ROCKS
SHALES
TEXAS
USA
WELL DRILLING