System for determining gas saturation of a formation and a wellb

Details System for determining gas saturation of a formation and a wellb System for determining gas saturation of a formation and a wellb

1995-03-17

1996-06-18

Hannaher, Constantine

Radiant energy

Geological testing or irradiation

Well testing apparatus and methods

250256, 250264, 250265, 250266, 2502691, 2502695, G01V 310

Patent

active

055280307

ABSTRACT:
A system for determining formation gas saturation in a cased wellbore which includes a neutron logging tool having a source, a first neutron detector offset towards the wellbore primarily sensitive to the wellbore and a second detector spaced further from the source and offset towards the formation, so that the second detector is sensitive primarily to liquid-filled porosity in the formation. The detectors are encased in a neutron moderator. The system includes a method of determining gas saturation in the formation by measuring count rates at the detectors, generating a wellbore gas saturation from the first detector counting rate, generating a ratio of counting rates of the second and first detectors to generate a value of liquid-filled porosity in the formation, and calculating a gas saturation in the formation by combining the liquid-filled porosity with a measurement of total porosity. The total porosity measurement can be obtained from core samples or other well logs run before the casing in set in the wellbore.

REFERENCES:
patent: 4092536 (1978-05-01), Smith
patent: 5051581 (1991-09-01), Hertzog

Affiliated with

Also associated with

Rating

System for determining gas saturation of a formation and a wellb does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with System for determining gas saturation of a formation and a wellb, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System for determining gas saturation of a formation and a wellb will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-224628