Method for determining residual oil concentration of a formation

Details Method for determining residual oil concentration of a formation Method for determining residual oil concentration of a formation

1978-06-01

1980-03-04

Willis, Davis L.

Radiant energy

Geological testing or irradiation

Well testing apparatus and methods

250269, G01V 500

Patent

active

041918835

ABSTRACT:
An improvement in the method of determining oil saturation in a subterranean formation, penetrated by a well-bore, is disclosed. In the method of determining oil concentration by measuring thermal neutron decay with a low salinity aqueous liquid in said well-bore and said formation, and measuring thermal neutron decay with a high salinity aqueous liquid in said well-bore and said formation, the improvement comprises adding to said low salinity liquid in the well-bore, only, a material which adjusts the thermal neutron capture cross section of the well-bore so that it is approximately the same as the thermal neutron capture cross section of the well-bore when it contains the high salinity liquid.

REFERENCES:
patent: 3562523 (1971-02-01), Richardson, et al.
patent: 3631245 (1971-12-01), Jorden et al.
patent: 3748474 (1973-07-01), Murphy
patent: 3783683 (1974-01-01), Murphy et al.

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