Chemical logging of geothermal wells

Patent ·

OSTI ID:5111335

Allen, C A; McAtee, R E

The presence of geothermal aquifers can be detected while drilling in geothermal formations by maintaining a chemical log of the ratio of the concentrations of calcium to carbonate and bicarbonate ions in the return drilling fluid. A continuous increase in the ratio of the concentrations of calcium to carbonate and bicarbonate ions is indicative of the existence of a warm or hot geothermal aquifer at some increased depth.

• DOE Contract Number: EY-76-C-07-1540
• Assignee: Dept. of Energy
• OSTI ID: 5111335
• Resource Relation: Patent File Date: Filed date 19 Dec 1979
• Country of Publication: United States
• Language: English

Related Subjects

15 GEOTHERMAL ENERGY
GEOTHERMAL WELLS
CHEMICAL LOGGING
ACID CARBONATES
CALCIUM COMPOUNDS
CARBONATES
DRILLING FLUIDS
GEOTHERMAL EXPLORATION
RAFT RIVER VALLEY
ALKALINE EARTH METAL COMPOUNDS
CARBON COMPOUNDS
EXPLORATION
FLUIDS
IDAHO
NORTH AMERICA
OXYGEN COMPOUNDS
PACIFIC NORTHWEST REGION
USA
WELL LOGGING
WELLS
150302* - Geothermal Exploration & Exploration Technology- Geochemical Techniques & Surveys
150303 - Geothermal Exploration & Exploration Technology- Exploratory Drilling & Well Logging