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Patent
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G01V 3/165 (2006.01) G01V 3/08 (2006.01)
Patent
CA 1167103
GEOMAGNETIC PROSPECTING SYSTEM AND METHOD ABSTRACT OF THE DISCLOSURE A geomagnetic prospecting system and method are dis- closed to determine the presence of hydrocarbon-bearing sub- strata below the surface of the earth. A plurality of sta- tion sites are selected each having angle measuring means and each angle measuring means having first and second magnetic field detection units perpendicular to each other. The first detection unit measures the vertical inclination angle, i.e., the magnetic dip needle angle of inclination, and the second detection unit measures the horizontal declination angle from true north. Each detection unit is mechanically or electri- cally adjusted to be substantially on a null of the magnetic field of the earth, and preferably is adjusted slightly off null to a more sensitive portion of the field detection pat- tern. Readings of the inclination and declination angles are taken substantially simultaneously at the plurality of sta- tion sites, and the presence of hydrocarbon-bearing substrata is indicated if both inclination and declination angles move toward negative in a one to ten-minute time period, "nega- tive" being defined as an inclination angle reducing the angle toward north and an eastern declination angle change toward west. This gives an immediate indication of the probable presence or absence of hydrocarbon substrata, so that a traverse line of station sites is not required, but, instead, one may move at random toward areas on the surface of the earth which continue to give promising results. The foregoing abstract is merely a resume of one general applica- tion, is not a complete discussion of all principles of operation or applications, and is not to be construed as a limitation on the scope of the claimed subject matter.
376014
Gowling Lafleur Henderson Llp
Hings Donald L.
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