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Geothermal Energy Cover Image

Table 2 Summary of the electrical logging runs conducted in DGE-1

From: Evaluation of the Lund deep geothermal exploration project in the Romeleåsen Fault Zone, South Sweden: a case study

Run# Depth interval Hole diameter Type of log
1 2.2–1012.5 m 26″ (660 mm) Spontaneous potential (SP)
Gamma ray
Borehole compensated sonic
XY-caliper
2 1012.5–2044 m 17½″ (445 mm) Gamma ray
Borehole compensated sonic
Six-electrode dipmeter
Temperature
3 1975–3322 m 12¼″ (311 mm) Gamma ray
Borehole compensated sonic
Full-wave sonic image waveform
Compensated spectral gamma ray
Production logging tool (PLT)
4–5 3180–3701 m 8½″ (244 mm) Caliper
Gamma ray
Borehole compensated sonic
Full-wave sonic image waveform
Compensated spectral gamma ray
Gamma ray cement bond log
Production logging tool (PLT)
  1. All logging runs were conducted in open hole