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Title: 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:
 [1]
  1. 477 W. Scenic Dr., Grand Junction, CO 81503
Publication Date:
Research Org.:
RUST GEOTECH INC
OSTI Identifier:
873630
Patent Number(s):
US 6207953
Application Number:
09/066,729
Assignee:
Wilson, Robert D. (477 W. Scenic Dr., Grand Junction, CO 81503)
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 = {},
url = {https://www.osti.gov/biblio/873630}, journal = {},
number = ,
volume = ,
place = {United States},
year = {2001},
month = {3}
}

Patent:

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