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

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

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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.

Inventors:

Vail, III, William B. ^[1]

(Bothell, WA)

Issue Date:: 1997-01-01

OSTI Identifier:: 870971

Assignee:: ParaMagnetic Logging, Inc. (Woodinville, WA) RLO

Patent Number(s):: US 5633590

Contract Number:: FG06-84ER13294

Research Org:: ParaMagnetic Logging, Inc. (Bothell, WA)

Country of Publication:: United States

Language:: English

Subject:: formation; resistivity; measurements; cased; quantitatively; determine; amount; oil; gas; methods; separate; amounts; geological; adjacent; disclosed; steps; obtaining; porosity; water; computing; combined; archie; equations; determining; relative; formation resistivity; geological formation; resistivity measurements; formation adjacent; quantitatively determining; quantitatively determine; relative amounts; separate amounts; rate amounts; relative amount; /324/

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