Proceedings of the 6th New Zealand Geothermal Workshop 1985. Electrical resistivity survey at the Wairakei geothermal field. New Zealand Geothermal Workshop [7-9 Nov. 1984, New Zealand].

Risk, G.F.

[1984]

171
CIENA

0-86869-056-2

Resistivity surveys of the Wairakei geothermal field were made during 1978-83 using the Schlumberger and multiple-source bipole-dipole techniques. The Schlumberger measurements used electrode arrays with AB/2 spacings of 500 m and 1000 m, while the multiple-source bipole-dipole survey used a current transmitter placed in high resistivity ground about 6 km north of the field. From the measurements, resistivity boundary zone defining the lateral transition from low (5 to 10 Qm) to high ( )100Qm) resistivity rock at about 0,5 to 1 km depth has been inferred. In the area of about 20 Km2, enclosed by the boundary zone, temperatures above 135°C exist in all holes penetrating deeper than 700 m. Resistivities in the eastern and northern corners of the field are lower than the average within the field.

Presenta diagrs.

NUEVA ZELANDIA; ENERGIA GEOTERMICA; ESTUDIOS GEOFISICOS; RESISTIVIDAD ELECTRICA; CAMPOS GEOTERMICOS;