Clay mineralogy and depositional history of the Frio Formation in two geopressured wells, Brazoria County, Texas
Twenty-three shale samples ranging in depth from 5194 ft to 13,246 ft from Gulf Oil Corporation No. 2 Texas State Lease 53034 well and 33 shale samples ranging in depth from 2185 ft to 15,592 ft from General Crude Oil Company/Department of Energy No. 1 Pleasant Bayou well were examined by x-ray techniques to determine the mineralogy of the geopressured zone in the Brazoria Fairway. Both wells have similar weight-percent trends with depth for a portion of the mineralogy. Calcite decreases, and plagioclase, quartz and total clay increase slightly. Within the clays, illite in mixed-layer illite/smectite (I/S) increases and smectite in mixed-layer I/S decreases. Four minerals have distinctly different trends with depth for each well. In the No. 2 Texas State Lease 53034 well, potassium feldspar and mixed-layer I/S decrease, kaolinite increases, and discrete illite is constant. In the No. 1 Pleasant Bayou well, potassium feldspar and kaolinite are constant, mixed-layer I/S increases, and discrete illite decreases.
- Research Organization:
- Trinity Univ., San Antonio, TX (USA)
- DOE Contract Number:
- AC08-79ET27111
- OSTI ID:
- 5053149
- Report Number(s):
- CONF-821009-1; ON: DE82016166
- Resource Relation:
- Conference: 32. annual meeting of the Gulf Coast Association of Geological Societies, Houston, TX, USA, 26 Oct 1982
- Country of Publication:
- United States
- Language:
- English
Similar Records
Shale mineralogy and burial diagenesis of Frio and Vicksburg Formations in two geopressured wells, McAllen Ranch area, Hidalgo County, Texas
Burial diagenesis and geochemical alterations and their relationship to high fluid pressures, Frio and Vicksburg shales
Related Subjects
GEOPRESSURED SYSTEMS
GEOLOGIC HISTORY
MINERALOGY
TEXAS
ANORTHOSITES
CALCITE
CLAYS
GEOLOGIC DEPOSITS
GEOLOGIC FORMATIONS
ILLITE
KAOLINITE
QUARTZ
SHALES
SMECTITE
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM SILICATES
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CARBON COMPOUNDS
CARBONATE MINERALS
CARBONATES
CHALCOGENIDES
ENERGY SYSTEMS
FEDERAL REGION VI
GABBROS
IGNEOUS ROCKS
MINERALS
NORTH AMERICA
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PLUTONIC ROCKS
ROCKS
SEDIMENTARY ROCKS
SILICATE MINERALS
SILICATES
SILICON COMPOUNDS
SILICON OXIDES
USA
Geothermal Legacy
150201* - Geology & Hydrology of Geothermal Systems- USA- (-1989)