Formation resistivity measurements from within a cased well used to quantitatively determine the amount of oil and gas present

Patent · Tue Dec 31 23:00:00 EST 1996

OSTI ID:870971

Methods to quantitatively determine the separate amounts of oil and gas in a geological formation adjacent to a cased well using measurements of formation resistivity are disclosed. 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 Archie's Equations, determining the relative amounts of oil and gas present from measurements within a cased well, and then quantitatively determining the separate amounts of oil and gas present in the formation.

• Research Organization: ParaMagnetic Logging, Inc. (Bothell, WA)
• DOE Contract Number: FG06-84ER13294
• Assignee: ParaMagnetic Logging, Inc. (Woodinville, WA)
• Patent Number(s): US 5633590
• OSTI ID: 870971
• Country of Publication: United States
• Language: English

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