Hydraulic and Thermal Behavior of a Hot Dry Rock Reservoir during a 30-Day Circulation Test
- Key words
- Reservoir Engineering; Well Testing; Injection; Injection Wells; Pressure; Production; Temperature
- Location
- Fenton Hill, New Mexico; Valles Caldera, New Mexico
- Conference
- Geothermal Resources Council Transactions
- Year
- 1987
- Session
- HDR/EGS; Injection; Well testing; Circulation testing
- Language
- English
Abstract
The Otake geothermal waters have been injected into two injecting wells up to for 656 days. The injection and other two observation wells range in depth from 365 to 450 m. During the injection test, the falloff and the maximum injectivity test were repeated to examine the decrease of injectivity. Using fluorescent dye, the tracer test was also conducted to determine the connectivity between to of the four wells. The permeability thickness product (kh) of Injection Well R-2 has reduced from 91 darcy-m to 5 darcy-m after injecting 5.49 x 10/5 m3 of water. In the case of R-1, its injectivity was almost lost after injecting a total of 4.59 x 10/5 m3 water. The value of kh 224 darcy-m decreased to 0.79 darcy-m and the water level rose up over the wellhead.
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