Technology

19 Aug Borehole Televiewer (BHTV)

Description The Borehole Televiewer (BHTV) was an acoustic device that scanned the wall of a borehole, producing an image of the reflectivity of the rock surrounding the wellbore as function of depth and azimuth. The BHTV was manufactured by SIMPLEC under license from Mobil Oil Corporation. The BHTV...

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19 Aug Geological High-Resolution Magnetic Tool (GHMT*)

Description Geological High-Resolution Magnetic Tool (GHMT) provided magnetic susceptibility and total magnetic induction measurements. The main use of the GHMT was to provide a magnetic reversal sequence in sediment. The GHMT consisted of two sondes. The Susceptibility Measurement Sonde (SUMS) made an induction-type measurement to record a signal related to formation susceptibility....

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19 Aug High-Resolution Laterolog Array Tool (HRLA*)

Description The High-Resolution Laterolog Array (HRLA) tool provides six resistivity measurements with different depths of investigation (including the borehole, or mud resistivity, and five measurements of formation resistivity with increasing depth of penetration into the formation). The sonde sends a focused current into the formation and...

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19 Aug Long Spacing Sonic Tool (LSS*)

Description Long Spacing Sonic Sonde (LSS*) contained two acoustic sources spaced two feet apart located eight feet below a pair of receivers also spaced two feet apart. This provided source-receiver offsets of 8, 10, 10, and 12 feet. The measurement relied on the "depth-derived" borehole...

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19 Aug Litho-Density Log (LDT*)

Description The Litho-Density Log (LDT*) had a 137Cs source and two detectors, all located on a "skid" (a pad held against the borehole wall by a spring-activated arm). The source emitted gamma rays at an energy of 662 keV. The two detectors (short-spaced and long-spaced) were shielded...

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