Radiant energy – Geological testing or irradiation – Well testing apparatus and methods
Patent
1995-05-19
2000-10-31
Hannaher, Constantine
Radiant energy
Geological testing or irradiation
Well testing apparatus and methods
250254, 250256, 250268, G01V 504
Patent
active
061406376
ABSTRACT:
A method of locating in situ hydrocarbons in underground formations comprises illuminating the borehole wall with light such as visible, infrared or ultraviolet light or combinations of these, from a source in a tool such as a wireline logging tool or an LWD tool, detecting any fluorescent radiation with a detector in the tool and analyzing the florescent radiation to determine the presence of hydrocarbon in the formation. The tool is moved through the borehole while irradiating the formation and detecting fluorescence. The borehole wall is illuminated and fluorescence detected through a window in the tool which is pressed against the borehole wall with sufficient force to displace any mudcake. The window is made of a wear resistant material such sapphire or diamond and is conveniently secured in a wear resistant housing which might be made of tungsten carbide or the like.
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Mullins Oliver C.
Rabbito Philip
Wu Xu
Batzer William B.
Hannaher Constantine
Jeffery Brigitte L.
Schlumberger Technology Corporation
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