formation microscanner

formation microscanner

[fȯr¦mā·shə ′mīk·rō‚skan·ər]
(petroleum engineering)
A downhole logging tool that provides a detailed image of the borehole wall on the basis of electrical contrasts.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
In 1988 the formation microscanner was added to the standard suite.
These essentially comprise in-hole seismic tools for vertical seismic profiling, a borehole televiewer for obtaining an acoustic image of the borehole wall (analogous to the formation microscanner), and, more recently, a susceptibility/magnetometer tool for resolving magnetic reversals in sediments, which are weakly magnetized compared to basement rocks.
Stress orientations can be inferred from failures of the borehole wall, known as "breakouts," which can be imaged using the borehole televiewer or formation microscanner. Changes in stress orientation can be depicted with depth or mapped regionally.
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