Stress measurements in crystalline rock: Comparison of overcoring, hydraulic fracturing and induced seismicity results
Author(s)
Krietsch, H.
Gischig, V.
Evans, K.
Doetsch, J.
Publisher
: American Rock Mechanics Association
Date issued
June 25, 2017
From page
2692
To page
2699
Abstract
In preparation of a decameter-scale fault stimulation experiment at the Grimsel Test Site, Switzerland, a comprehensive rock stress characterization survey was conducted. The survey combines overcoring of CSIRO-HI and USBM probes with hydrofracture measurements with concomitant monitoring of the induced microseismicity. Impression packer surveys were run following the hydrofracture tests to determine the orientation of the induced fracture at the wellbore. The orientation of the fracture away from the wellbore was determined from the pattern of the microseismicity. The use of a transverse isotropic model for inverting the strains measured during overcoring was essential to obtain stress solutions that were consistent with the hydrofracture and microseismicity results…
Notes
, 2017
Event name
51st US Rock Mechanics / Geomechanics Symposium
Location
San Francisco, California, USA
Publication type
conference paper
File(s)