Apparatus and methods for determining gas saturation and porosity of a formation penetrated by a gas filled or liquid filled borehole
Abstract
Methods and apparatus are disclosed for determining gas saturation, liquid saturation, porosity and density of earth formations penetrated by a well borehole. Determinations are made from measures of fast neutron and inelastic scatter gamma radiation induced by a pulsed, fast neutron source. The system preferably uses two detectors axially spaced from the neutron source. One detector is preferably a scintillation detector responsive to gamma radiation, and a second detector is preferably an organic scintillator responsive to both neutron and gamma radiation. The system can be operated in cased boreholes which are filled with either gas or liquid. Techniques for correcting all measurements for borehole conditions are disclosed.
- Inventors:
-
- 477 W. Scenic Dr., Grand Junction, CO 81503
- Issue Date:
- Research Org.:
- RUST GEOTECH INC
- OSTI Identifier:
- 873630
- Patent Number(s):
- 6207953
- Application Number:
- 09/066,729
- Assignee:
- Wilson, Robert D. (477 W. Scenic Dr., Grand Junction, CO 81503)
- Patent Classifications (CPCs):
-
G - PHYSICS G01 - MEASURING G01V - GEOPHYSICS
- DOE Contract Number:
- AC04-94AL96907
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- apparatus; methods; determining; gas; saturation; porosity; formation; penetrated; filled; liquid; borehole; disclosed; density; earth; formations; determinations; measures; fast; neutron; inelastic; scatter; gamma; radiation; induced; pulsed; source; preferably; detectors; axially; spaced; detector; scintillation; responsive; organic; scintillator; operated; cased; boreholes; techniques; correcting; measurements; conditions; gas filled; radiation induced; earth formations; fast neutron; scintillation detector; earth formation; gamma radiation; neutron source; cased boreholes; axially spaced; cased borehole; detector responsive; determining gas; gas fill; liquid filled; gas saturation; cased bore; /250/
Citation Formats
Wilson, Robert D. Apparatus and methods for determining gas saturation and porosity of a formation penetrated by a gas filled or liquid filled borehole. United States: N. p., 2001.
Web.
Wilson, Robert D. Apparatus and methods for determining gas saturation and porosity of a formation penetrated by a gas filled or liquid filled borehole. United States.
Wilson, Robert D. Tue .
"Apparatus and methods for determining gas saturation and porosity of a formation penetrated by a gas filled or liquid filled borehole". United States. https://www.osti.gov/servlets/purl/873630.
@article{osti_873630,
title = {Apparatus and methods for determining gas saturation and porosity of a formation penetrated by a gas filled or liquid filled borehole},
author = {Wilson, Robert D},
abstractNote = {Methods and apparatus are disclosed for determining gas saturation, liquid saturation, porosity and density of earth formations penetrated by a well borehole. Determinations are made from measures of fast neutron and inelastic scatter gamma radiation induced by a pulsed, fast neutron source. The system preferably uses two detectors axially spaced from the neutron source. One detector is preferably a scintillation detector responsive to gamma radiation, and a second detector is preferably an organic scintillator responsive to both neutron and gamma radiation. The system can be operated in cased boreholes which are filled with either gas or liquid. Techniques for correcting all measurements for borehole conditions are disclosed.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Mar 27 00:00:00 EST 2001},
month = {Tue Mar 27 00:00:00 EST 2001}
}
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Works referenced in this record:
Bulk density logging with high-energy gammas produced by fast neutron reactions with formation oxygen atoms
conference, January 1995
- Wilson, R. D.
- 1995 IEEE Nuclear Science Symposium and Medical Imaging Conference Record