GNS Science Consultancy Report 2006/0XX
GNS Science Consultancy Report 2006/0XX
GNS Science Consultancy Report 2006/0XX
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Table 3. Drilling new wells in regions with heat flow >70 mW/m 2 where the geothermal gradient is >33 o C/km. Two wells are proposed for each 100 km 2 area. One is for<br />
production, the other for reinjection. CF= conversion factor<br />
Region<br />
Thermal<br />
gradient<br />
( o C/km)<br />
Area in<br />
km 2<br />
Temperature<br />
at depth<br />
Temperature<br />
of extraction<br />
( o C)<br />
Enthalpy<br />
(kJ/kg)<br />
Flow<br />
(kg/s)<br />
2<br />
wells/100<br />
km 2<br />
Success<br />
No. of<br />
wells for<br />
power<br />
generation<br />
kW<br />
kWe<br />
(0.1 CF)<br />
3,200m<br />
North Island 33 7,865 120 o C 100 419 4 157 0.4 31 52,727 5,273 166 0.17<br />
South<br />
Island 33 18,800 120 o C 100 419 4 376 0.4 75 126,035 12,604 398 0.40<br />
TJ<br />
PJ<br />
2,600m<br />
Coromandel 40 1,610 120 o C 100 419 4 32 0.4 6 10,793 1,079 34 0.03<br />
Northland 40 3,245 120 o C 100 419 4 65 0.4 13 21,754 2,175 69 0.07<br />
TOTAL 31,520 125 21,131 667 0.67<br />
<strong>GNS</strong> <strong>Science</strong> <strong>Report</strong> 2007/23 19
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