Method and apparatus for producing an image log of a...

Details Method and apparatus for producing an image log of a... Method and apparatus for producing an image log of a...

G - Physics

01

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324/10

G01V 3/34 (2006.01) E21B 47/00 (2006.01) G01V 3/18 (2006.01) G01V 3/20 (2006.01) G01V 3/38 (2006.01)

Patent

CA 1209208

METHOD AND APPARATUS FOR PRODUCING AN IMAGE LOG OF A BOREHOLE WALL PENETRATING AN EARTH FORMATION Abstract Of Disclosure A technique is described for producing an image log of an investigation of the wall of a borehole with a high resolution tool. The tool employs sensors for measuring characteristic such as the conductivity of the wall at locations which circumferen- tially overlap. An accurate tool depth measuring device is employed to modify the measured characteristic so that the mea- surement can be displayed as a linear function of depth without visually detectable artifacts. Various signal processing and image enhancing techniques are described to produce an image log on which the characteristic can be seen as a variable intensity image in which small scale variations of the measured characteris- tic remain discernable and significant features visually stand out from the log.

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