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Chapter 6 Drilling Technology and Costs Table A.6.3a Actual and predicted geothermal well drilling and completion costs (2004 U.S. $). Well ID Depth Depth Cost When Year Cost Year Comments (meters) (feet) Drilled (M$) Drilled 2004 (M$) GT1 732 2402 0.060 1972 0.66 GT2 2932 9619 1.900 1974 10.95 Fenton Hill Site, EE1 3064 10052 2.300 1975 10.78 New Mexico, USA. Actual Costs EE2 4660 15289 7.300 1980 12.69 (Tester and Herzog, 1990) EE3 4250 13944 11.500 1981 19.16 EE3a 4572 15000 5.160 1988 11.08 RH11 (low) 2175 7136 1.240 1981 2.36 RH11 (high) 2175 7136 1.984 1981 3.78 Rosemanowes Site, Cornwall, UK. RH12 (low) 2143 7031 1.240 1981 2.36 Actual Costs. (Tester and Herzog, 1990) RH12 (high) 2143 7031 1.984 1981 3.78 Low: $1 = 1£ GBP RH15 (low) 2652 8701 2.250 1985 5.81 High: $1.6 = 1£ GBP RH15 (high) 2652 8701 3.600 1985 9.29 UK (Shock, 1987) 6000 19685 8.424 1985 16.13 Camborne School of Mines($1 = 1£ GBP) Bechtel (1988) 3657 11998 3.359 1987 9.08 Predict. for Roosevelt Hot Springs, UT Hori et al. (1986) 3000 9843 6.000 1985 15.49 Predicted Costs Entingh (1987) I 3000 9843 6.900 1984 17.18 Predicted Costs based on Entingh (1987) II 3000 9843 3.800 1984 9.46 Heat Mining Entingh (1987) III 3000 9843 3.000 1984 7.47 Heat Mining 3000 9843 3.000 1984 7.47 Predicted Costs Armstead & Tester (1987) 635 The Geysers 1800 5906 0.486 1976 1.78 Actual costs Milora & Tester (1976) The Geysers 3048 10000 2.275 1989 5.69 Actual costs Batchelor (1989) Imperial Valley 1600 5249 0.165 1976 0.60 Actual costs Milora & Tester (1976) IMGEO IVFL 1829 6001 1.123 1986 2.74 IMGEO IVBI 2743 8999 0.956 1986 2.57 IMGEO BRFL 2438 7999 1.217 1986 3.27 IMGEO BRBI 914 2999 0.556 1986 1.32 Meridian predictions of hydrothermal IMGEO CSFL 3048 10000 2.032 1986 5.44 wells from IMGEO database (Entingh, IMGEO CSBI 914 2999 0.576 1986 1.37 1989). Only base well costs shown. IMGEO YVFL 1524 5000 0.906 1986 3.76 IMGEO YVBI 152 499 0.406 1986 1.46 IMGEO GYDS 3048 10000 1.155 1986 3.09PDF Image | Drilling Technology and Costs
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