Chemical logging of geothermal wells
Chemical logging was developed to permit identification of zones bearing geothermal water during drilling of geothermal wells. This technique consists of collection of circulation fluid samples at specified periods determined by drill-bit depth. These samples are analyzed for bicarbonate (HCO/sub 3//sup -/), Cl/sup +/31,F/sup +/31,Ca/sup ++/, and silicon dioxide (SiO/sub 2/). The results are plotted as a function of depth, and the resulting log indicates the presence of water-bearing structure. It was discovered that the ratio of Ca/sup ++/ and HCO/sub 3//sup -/ concentrations is a temperature indicator. It was also found that chemical composition changes precede structural changes. This report describes chemical logging of three wells at the Raft River geothermal site, Idaho. 3 refs.
- Research Organization:
- Edgerton, Germeshausen and Grier Inc, Idaho Falls, ID
- OSTI ID:
- 5086497
- Report Number(s):
- CONF-790283-; CONF-7904194-
- Journal Information:
- Am. Soc. Test. Mater., Spec. Tech. Publ.; (United States), Vol. 717; Conference: Conference on geothermal scaling and corrosion, New Orleans, LA, USA, 19 Feb 1979
- Country of Publication:
- United States
- Language:
- English
Similar Records
Chemical logging: a geothermal technique
Raft River Geothermal Exploratory Hole No. 3
Related Subjects
GEOTHERMAL FLUIDS
CHEMICAL COMPOSITION
SAMPLING
GEOTHERMAL WELLS
WELL LOGGING
RAFT RIVER VALLEY
IDAHO
FEDERAL REGION X
FLUIDS
NORTH AMERICA
USA
WELLS
150302* - Geothermal Exploration & Exploration Technology- Geochemical Techniques & Surveys
150303 - Geothermal Exploration & Exploration Technology- Exploratory Drilling & Well Logging
152001 - Geothermal Data & Theory- Properties of Aqueous Solutions