Method for determining porosity in an invaded gas reservoir

Details Method for determining porosity in an invaded gas reservoir Method for determining porosity in an invaded gas reservoir

1995-06-26

1997-11-04

Fields, Carolyn E.

Radiant energy

Geological testing or irradiation

Well testing apparatus and methods

250266, 2502693, 2502694, G01V 514

Patent

active

056842996

ABSTRACT:
The formation porosity of a partially invaded gas reservoir in subsurface earth formation is determined from the sum of percentages of density and neutron tool porosities. During the method of this invention, density tool and neutron tool porosity measurements are taken of the formation. These porosity measurements are fitted to a predetermined porosity to determine the percentage of each porosity measurement that will be summed to estimate the formation porosity of the gas reservoir. The percentages of the density and neutron porosity measurements are dependent on a correction factor that is determined from the fitting process.

REFERENCES:
patent: 3453433 (1969-07-01), Alger et al.
patent: 5349184 (1994-09-01), Wraight
patent: 5459314 (1995-10-01), Plaser

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