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Monitoring and repairing geothermal casing cement [electronic resource] : a case history

Published:
Los Alamos, N.M. : Los Alamos Scientific Laboratory, 1980.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description:
Pages: 5 : digital, PDF file
Additional Creators:
Los Alamos Scientific Laboratory and United States. Department of Energy. Office of Scientific and Technical Information
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Summary:
A manmade geothermal reservoir has been created by drilling a deep hole into relatively impermeable hot rocks, creating a large surface area for heat transfer by hydraulic fracturing, then drilling a second hole to intersect the fracture to complete the closed circulation loop. A second generation system, presently being drilled, will entail creating multiple, parallel, vertical fractures between a pair of inclined boreholes. The original completion of injection Hole EE-1, consisting of a conventional high-temperature formulation of Class B portland cement, stabilized with 40% silica sand, did not withstand the cyclic stresses, and rapid deterioration of casing-to-cement and cement-to-formation bonds occurred, which allowed significant flow in the resulting microannulus. The performance history of the casing cement for the existing HDR EE-1 injection well, the subsequent remedial cementing program, the cement bond logs, and the radioactive isotope tracer injections tests, used to monitor the condition of the casing cement is described. (MHR)
Report Numbers:
E 1.99:la-ur-80-1485
E 1.99: conf-800920-5
conf-800920-5
la-ur-80-1485
Subject(s):
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Note:
Published through SciTech Connect.
01/01/1980.
"la-ur-80-1485"
" conf-800920-5"
Geothermal Resource Council annual meeting, Salt Lake City, UT, USA, 9 Sep 1980.
Pettitt, R.A.
Funding Information:
W-7405-ENG-36
View MARC record | catkey: 14386975