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

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. 7 figs.
Authors:
Publication Date:
OSTI Identifier:
489087
Report Number(s):
US 5,633,590/A/
PAN: US patent application 8-214,648
DOE Contract Number:
FG06-84ER13294
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 27 May 1997
Research Org:
Paramagnetic Logging Inc
Sponsoring Org:
USDOE, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; 03 NATURAL GAS; OIL WELLS; NATURAL GAS WELLS; RESISTIVITY LOGGING; OIL SATURATION; GAS SATURATION; WELL CASINGS; CALCULATION METHODS; ELECTRIC CONDUCTIVITY; POROSITY; RESERVOIR ROCK