Processing formation resistivity measurements obtained from within a cased well used to quantitatively determine the amount of oil and gas present
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United States of America Patent
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Issued Date -
Nov 28, 2002
app pub date -
Jul 10, 2002
filing date -
Mar 17, 1994
priority date (Note) -
Abandoned
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Abstract
Methods are provided to quantitatively determine the separate amounts of oil and gas in a geological formation adjacent to a cased well using measurements of formation resistivity. The steps include obtaining resistivity measurements from within a cased well of a given formation, obtaining the porosity, obtaining the resistivity of formation water present, computing the combined amounts of oil and gas present using the Archie Relations, determining the relative amounts of oil and gas present, and then quantitatively determining the separate amounts of oil and gas present in the formation.
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