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Title: Chemical logging of geothermal wells

Abstract

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.

Inventors:
 [1];  [1]
  1. Idaho Falls, ID
Issue Date:
Research Org.:
Idaho National Lab. (INL), Idaho Falls, ID (United States)
OSTI Identifier:
864078
Patent Number(s):
4306879
Assignee:
United States of America as represented by United States (Washington, DC)
Patent Classifications (CPCs):
E - FIXED CONSTRUCTIONS E21 - EARTH DRILLING E21B - EARTH DRILLING, e.g. DEEP DRILLING
G - PHYSICS G01 - MEASURING G01V - GEOPHYSICS
DOE Contract Number:  
EY-76-C-07-1540
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
chemical; logging; geothermal; presence; aquifers; detected; drilling; formations; maintaining; log; ratio; concentrations; calcium; carbonate; bicarbonate; return; fluid; continuous; increase; indicative; existence; warm; hot; aquifer; increased; depth; chemical log; drilling fluid; /436/

Citation Formats

Allen, Charles A, and McAtee, Richard E. Chemical logging of geothermal wells. United States: N. p., 1981. Web.
Allen, Charles A, & McAtee, Richard E. Chemical logging of geothermal wells. United States.
Allen, Charles A, and McAtee, Richard E. Thu . "Chemical logging of geothermal wells". United States. https://www.osti.gov/servlets/purl/864078.
@article{osti_864078,
title = {Chemical logging of geothermal wells},
author = {Allen, Charles A and McAtee, Richard E},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1981},
month = {1}
}