Geochemistry of formation waters from Pleasant Bayou No. 2 well and adjacent areas in coastal Texas
Pleasant Bayou No. 2 in Brazoria County, Texas, is the first well drilled and completed exclusively for evaluating the energy resoures from geopressured- geothermal zones. Water samples were obtained from 2 sandstone units in the geopressured zone (4,737 to 4,740 m and 4,453 to 4,471 m) during production tests of these units. Thirty formation-water samples also were obtained from normally and geopressured zones from 5 oil and gas fields located to the east and north of the test well in Brazoria and Galveston counties, Texas. All the samples are from sandstone units within the Frio Clay of Oligocene (.) age. Detailed chemical and isotope analyses of the waters show that the salinity of water in the geopressured zone from the oil and gas fields ranges from ca 55,000 to 75,000 mg/L dissolved solids--the salinity of water in the overlying normally pressured zone is lower and the 2 waters are not chemically compatible. All the formation waters are modified marine connate waters of the Na-Cl type.
- OSTI ID:
- 6229038
- Journal Information:
- Texas Univ. Bureau Economics Geology, US Gulf Coast Geopressured-Geothermal Energy Research and Development Conference; (United States), Vol. 1; Conference: 4. Texas Univ. Bureau Economics Geology, US Gulf Coast Geopressured-Geothermal Energy Research and Development conference, Austin, TX, USA, 29-31 Oct 1979
- Country of Publication:
- United States
- Language:
- English
Similar Records
Maturity anomalies, fluid flow, and permeability preservation in Frio and Anahuac Formations, upper Texas Gulf Coast
Seismic studies in Austin-Pleasant Bayou and Cuero Prospects - a summary of research activities
Related Subjects
GEOPRESSURED SYSTEMS
GEOTHERMAL FLUIDS
RESERVOIR FLUIDS
CHEMICAL COMPOSITION
COMPARATIVE EVALUATIONS
ISOTOPE RATIO
TEXAS
BRINES
CHEMICAL ANALYSIS
DRILL STEM TESTING
GEOLOGIC FORMATIONS
GEOTHERMAL WELLS
GULF COAST
HYDROTHERMAL SYSTEMS
INTERSTITIAL WATER
NATURAL GAS FIELDS
OIL FIELDS
RESERVOIR ROCK
RESOURCE ASSESSMENT
SALINITY
SANDSTONES
TERTIARY PERIOD
CENOZOIC ERA
ENERGY SYSTEMS
FEDERAL REGION VI
FLUIDS
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOTHERMAL SYSTEMS
GROUND WATER
HYDROGEN COMPOUNDS
MINERAL RESOURCES
NATURAL GAS DEPOSITS
NORTH AMERICA
OXYGEN COMPOUNDS
PETROLEUM DEPOSITS
RESOURCES
ROCKS
SEDIMENTARY ROCKS
TESTING
USA
WATER
WELLS
152001* - Geothermal Data & Theory- Properties of Aqueous Solutions