Water Flow Impedance through a Fracture Made by Hydraulic Pressure
- Key words
- flow impedance, hydraulic fracture, fracture aperture, hot dry rock
- Location
- Hijiori, Japan; Inada, Japan
- Conference
- World Geothermal Congress
- Year
- 1995
- Session
- SECTION 12 - Advanced Technologies (HDR - Magma - Geopressur
- Language
- English
- Paper number
- 4-Kobayashi
Full text
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Abstract
The of these studies are collect basic data on the deformation of rock samples during the extension of a hydraulic fracture and on the fracture deformation during injection of water into a fracture. Inada granite was used for the tests. The deformation of the rock samples were measured by several LVDTs and pai-gauges in order to estimate initial fracture width and the mean aperture of hydraulic fractures The Rock deformations during the hydraulic fracturing considered to be equal to the fracture aperture were about 209 independent whether the fractures were created parallel to the rift plane or parallel to the hardway plane During cyclic loading of the fractures the amplitude of fracture displacement decreased and flow impedance in the fracture increased
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