Radiant energy – Geological testing or irradiation – Well testing apparatus and methods
Patent
1995-06-07
1997-09-02
Hannaher, Constantine
Radiant energy
Geological testing or irradiation
Well testing apparatus and methods
250256, 250268, G01V 800
Patent
active
056635591
ABSTRACT:
Images of rock formations below the earth's surface can be obtained on a microscopic scale. A borehole tool uses a seal to isolate an interval of the formation from borehole fluids which are outside the seal. A probe of the tool engages a wall of the formation and then draws formation fluid from the formation into the interior of the tool. The tool then produces an optical image of the formation which indicates rock texture. The seal can comprise a pad, inflatable packers, compressional packers, or cement plugs. The images of the formation can be obtained with electro-optic imagers such as charge-coupled devices (CCD) or a camera operating in the visible and/or near infrared range, or with ultrasonic transducers operating in the sub-MHz to mid GHz range, for example. The near infrared range provides an optical image of the formation through opaque fluids such as oil based muds or oil itself.
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Quinnell, Richard A., "Image Compression part 2", EDN, (Mar. '93), pp. 120-126 was cited in the specification and describes Moving Pictures Expert Group (MPEG), one of the standards for used for image compression.
Hung, Andy C., "PVRG-JPEG CODEC 1.1", Mar. 29, 1993 describes the Portable Research Video Group's (PVRG) software codec for still images, commercially available compression algorithms.
Auzerais Fran.cedilla.ois M.
Schroeder Robert L.
Hannaher Constantine
Pojunas Leonard W.
Schlumberger Technology Corporation
Smith Keith G. W.
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