Measuring and testing – Borehole or drilling – Downhole test
Patent
1981-12-09
1983-11-22
Birmiel, Howard A.
Measuring and testing
Borehole or drilling
Downhole test
250269, 250270, E21B 4900, G01V 514
Patent
active
044161514
ABSTRACT:
Method and apparatus for determining the hydrogen and carbon densities of oil in situ in a subsurface geological formation are proposed which utilize the 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 is less sensitive, say, to the hydrogen density of the formation fluid than is the neutron porosity tool. The magnitude of the difference is indicative of the hydrogen and carbon densities of the oil.
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"Formation Evaluation With Nuclear and Acoustic Logs", Lebreton et al., Fourth Annual Logging Symposium Transactions, May 1963.
Birmiel Howard A.
Borst Stephen L.
Gordon David P.
Schlumberger Technology Corporation
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