G - Physics – 01 – V
Patent
G - Physics
01
V
358/4
G01V 5/00 (2006.01) G01N 23/08 (2006.01) G01N 23/22 (2006.01) G01V 5/10 (2006.01)
Patent
CA 1070030
ABSTRACT OF THE DISCLOSURE Illustrative embodiments of the present invention include methods and apparatus for producing indications of the presence of hydrocarbons in subsurface earth formations. In one embodiment, two different pore volume. indications are derived and comparably displayed. The first is primarily dependent upon the hydrogen content of the fluid in the pore space of the formation. The second pore volume indication is produced directly from a measurement of the thermal neutron absorption characteristic of the formation and a value for the water component of the formation. Hydrocarbons are detected with the present invention by differences in the pore volume indications, even when clay fractions are higher and then formation water salinities are lower than normally required for prior art absorption measurement application. Compensations for hydro- carbon type and clay effects may also be made. The nature of the hydrocarbon may also be indicated and indications for hydrocarbon producibility and water free production are also provided.
251819
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