Chemical logging of geothermal wells

Conference · Mon Dec 31 23:00:00 EST 1979 · Am. Soc. Test. Mater., Spec. Tech. Publ.; (United States)

OSTI ID:5086497

McAtee, R E; Allen, C A; Lewis, L C

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), Journal Name: Am. Soc. Test. Mater., Spec. Tech. Publ.; (United States) Vol. 717; ISSN ASTTA
• Country of Publication: United States
• Language: English

Related Subjects

15 GEOTHERMAL ENERGY
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
CHEMICAL COMPOSITION
FEDERAL REGION X
FLUIDS
GEOTHERMAL FLUIDS
GEOTHERMAL WELLS
IDAHO
NORTH AMERICA
RAFT RIVER VALLEY
SAMPLING
USA
WELL LOGGING
WELLS