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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