In-situ hydraulic parameters for the Carnmenellis granite hot dry rock geothermal energy research reservoir

Conference · Sat Oct 01 00:00:00 EDT 1983 · Soc. Pet. Eng. AIME, Pap.; (United States)

OSTI ID:5247344

Pine, R J; Ledingham, P

A research hot dry rock (HDR) geothermal energy reservoir is currently under development in the Carnmenellis granite in Cornwall (U.K.) at a depth of about 2000 m. This paper details the conduct, analysis and interpretation of hydraulic tests using low to medium pressures and flow rates. These tests allowed an evaluation of the in-situ hydraulic parameters relevant to initial water storage and long term leakage. Tests were analysed using both diffusion theory and an explicit coupled hydraulic/mechanical computer code. At low fluid overpressures the permeabilities, in terms of uniform diffusion, were in the range 1-10 microdarcy (..mu..d), rising to about 60 ..mu..d at overpressures of about 5 MPa. Long term leakage from an HDR reservoir implied by these figures is minor. The computer model was able to simulate several cycles of injections and shut-ins at progressively higher pressures and flow rates with a single set of variables.

• Research Organization: Camborne School of Mines
• OSTI ID: 5247344
• Report Number(s): CONF-8310121-
• Journal Information: Soc. Pet. Eng. AIME, Pap.; (United States), Journal Name: Soc. Pet. Eng. AIME, Pap.; (United States) Vol. SPE12020; ISSN SEAPA
• Country of Publication: United States
• Language: English

Related Subjects

15 GEOTHERMAL ENERGY
150904* -- Geothermal Engineering-- Geothermal Reservoir & Well Performance
COMPUTERIZED SIMULATION
ENERGY SYSTEMS
ENGINEERING
EUROPE
EXPLORATION
FIELD TESTS
FLOW RATE
FLUID MECHANICS
FLUIDS
GEOTHERMAL EXPLORATION
GEOTHERMAL RESOURCES
GEOTHERMAL SYSTEMS
HOT-DRY-ROCK SYSTEMS
HYDRAULICS
MECHANICS
RESERVOIR ENGINEERING
RESERVOIR FLUIDS
RESERVOIR PRESSURE
RESERVOIR ROCK
RESOURCES
SIMULATION
TESTING
UNITED KINGDOM
WESTERN EUROPE