Correlation of optimum free gas saturation with rock and fluid properties

Journal Article · Mon Jan 01 04:00:00 EST 1968 · 8th Biennial SPE of AIME North Texas Sect. Secondary; (United States)

OSTI ID:6046661

Khelil, C

The optimum gas saturation is defined as that free gas saturation needed to achieve maximum oil recovery by waterflooding and primary depletion. This paper presents an investigation to develop a relationship between the optimum free gas saturation at which to waterflood a reservoir and the properties of the fluids and the rock. The optimum gas saturations for various rock-fluid systems were obtained from the literature and from previously unpublished sources. Distribution of the rock and fluid systems assures a good representation of reservoirs where the effects of free gas saturation will be most benefical. A multiple regression analysis program written for the IBM 7094 digital computer is used to compare numerous equations and to calculate their coefficients. The final equation containing 4 coefficients results in an average absolute deviation of 4.6% for all the sets of data. The correlation developed is useful to predict the optimum gas saturation at which maximum oil recovery is obtained from variables that normally are measured either in the laboratory or in the field. Finally, an example calculation based on actual reservoir rock and fluid properties is presented. (26 refs.)

• OSTI ID: 6046661
• Journal Information: 8th Biennial SPE of AIME North Texas Sect. Secondary; (United States), Journal Name: 8th Biennial SPE of AIME North Texas Sect. Secondary; (United States) Vol. SPE-1983
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
ENERGY SOURCES
ENHANCED RECOVERY
EQUATIONS
FLUID INJECTION
FOSSIL FUELS
FUELS
GAS SATURATION
MATHEMATICS
OIL WELLS
OPTIMIZATION
PERMEABILITY
PETROLEUM
POROSITY
RECOVERY
REGRESSION ANALYSIS
RESERVOIR ROCK
ROCK-FLUID INTERACTIONS
SATURATION
STATISTICS
STIMULATION
WATERFLOODING
WELL STIMULATION
WELLS