Title: |
The Self-Potential Response During Hydraulic Fracturing of Sierra Granite |
Authors: |
Jeffrey R. Moore, Steven D. Glaser |
Key Words: |
self potential, hydraulic fracturing |
Conference: |
Stanford Geothermal Workshop |
Year: |
2006 |
Session: |
Geophysics |
Language: |
English |
Paper Number: |
Moore |
File Size: |
112KB |
View File: |
|
The self-potential (SP) response during hydraulic fracturing of intact Sierra granite specimens was investigated in the laboratory. Excellent correlation of injection pressure and SP suggests that the SP response is created primarily by electrokinetic coupling. For low injection pressures the variation of SP and pressure drop is linear indicating a constant coupling coefficient (Cc). However, for injection pressures >2MPa the Cc increases with pressure by nearly 80% in an exponential trend. The increasing Cc is likely related to increasing permeability at high pore pressures due to dilatancy of micro-cracks.
Press the Back button in your browser, or search again.
Copyright 2006, Stanford Geothermal Program: Readers who download papers from this site should honor the copyright of the original authors and may not copy or distribute the work further without the permission of the original publisher.
Attend the nwxt Stanford Geothermal Workshop,
click here for details.