Method and apparatuses for logging hydrocarbon reservoirs

Details Method and apparatuses for logging hydrocarbon reservoirs Method and apparatuses for logging hydrocarbon reservoirs

G - Physics

01

V

G01V 5/10 (2006.01) E21B 47/04 (2006.01)

Patent

CA 2357216

A method, of logging a borehole, for use in a cased oil well for detecting the gas/oil or water/oil contact in a hydrocarbon reservoir, using a neutron capture technique to detect one or more properties of fluid includes comparing the count rates from two or more radiation detectors spaced at respective first and second distances from an isotopic source of continuous neutron radiation. The contact detection criteria are arranged to be substantially independent of borehole fluid characteristics. Apparatus (10) for carrying out the method includes a logging tool (10) having an isotopic source (16) and two spaced detectors (17,18).

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