Televiewer measurement of in-situ stress direction at the Fenton Hill Hot Dry Rock Site, New Mexico
The in situ stresses at Fenton Hill has been determined in drill hole EE-3A by observations of wellbore breakouts on imagery obtained with a televiewer logging tool. Wellbore shape, tool offcentering, and tool misalignment cause geometric distortions which have been treated by comparing imagery from two logging runs made six months apart. The comparison establishes that wellbore degradation in drill hole EE-3A is due to breakouts, which grow larger with time. The azimuth of the axis of minimum horizontal principal stress is estimated to be 110.7 +//minus/ 10.3 deg E of true N at a depth of 11,500 ft, increasing with depth at a rate of 1 deg per 50 ft. This method of measuring the orientation of horizontal principal axes is considerably more accurate than previous methods tried at Fenton Hill. The results agree generally with other stress indicators. The results support the concept that direction of reservoir growth during hydraulic stimulation favours the intermediate axis over other principal axes of stress. 11 figs., 1 tab.
- Research Organization:
- Los Alamos National Lab., NM (USA)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 6812414
- Report Number(s):
- LA-UR-88-1775; CONF-881045-3; ON: DE88014472
- Resource Relation:
- Conference: Annual meeting of the Geothermal Resources Council, San Diego, CA, USA, 9 Oct 1988; Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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