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Work on the Camborne School of Mines Geothermal Energy Project at Rosemanowes Quarry in Cornwall, England, began in 1977 and continued until 1986. Phase 1 involved preliminary shallow depth experiments at 300m depth. During Phase 2A a reservoir was created at a depth of about 2km by stimulation of existing rock joints using fresh water injections. This was subsequently circulated and some geothermal heat recovered. The performance of the Phase 2A system was deficient in two respects : excessive water consumption and high impedence. In Phase 2B a third well was drilled into the microseismic envelope below the original wells to investigate the nature of the stimulated rock mass and to provide access for an improved circulation system. Throughout this phase an enhanced microseismic detection system was in operation, which provided extensive data on event locations, source parameters and fault-plane solutions. The results of this monitoring and their interpretations are the main content of this report. Phase 2B achieved many of the objectives set for it, but still left a reservoir which had too high an impedence, too low water recovery and an unacceptable rate of thermal drawdown.

Additional information

Authors: PARKER R H, Camborne School of Mines, Geothermal Energy Project, Cornwall (GB)
Bibliographic Reference: EUR 11840 EN (1989) Vol. 1 and Vol. 2, 1392 pp.
Availability: Pergamon Press plc, Headington Hill Hall, Oxford OX3 0BW (GB)
ISBN: ISBN 0-08-037929-X
Record Number: 199010392 / Last updated on: 1994-12-01
Original language: en
Available languages: en
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