Method and apparatus for distinguishing hydrocarbon from water

Details Method and apparatus for distinguishing hydrocarbon from water Method and apparatus for distinguishing hydrocarbon from water

G - Physics

01

V

358/4

G01V 5/10 (2006.01)

Patent

CA 1189986

METHOD AND APPARATUS FOR DISTINGUISHING HYDROCARBON FROM WATER IN SITU ABSTRACT Method and apparatus for distinguishing oil from water in situ in a subsurface geological formation are proposed which utilize the anomalous response of a neutron porosity tool to some oils. Apparent porosity derived from a neutron porosity investigation tool which measures spatial neutron flux distribution is compared to the porosity derived from a second investigating tool whose response is not or at least it less sensitive to the hydrogen density of the formation fluid than is the neutron porosity tool. Where a real difference is evident, oil rather than water is indicated.

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