Method for determining density of an earth formation
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United States of America Patent
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Sep 8, 1998
Issued Date -
N/A
app pub date -
Mar 4, 1997
filing date -
Sep 16, 1994
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Abstract
Apparatus for determining the density of underground formations surrounding a borehole, such as a wireline logging tool or a logging-while-drilling tool, includes a neutron source for irradiating the formations from within the borehole and at least one detector which detects neutrons and gamma rays in the borehole resulting from the irradiation of the formations with neutrons. Multiple detectors can also be used to separately detect neutrons and gamma rays. Detected neutron and gamma ray signals are each analyzed and combined to determine the density of an earth formation.
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