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Information Seminar Paper

Title

CONCENTRATION DEPENDENT RELATIVE PERMEABILITY AND CAPILLARY PRESSURE CURVES FOR LOW SALINITY WATER FLOODING IN SANDSTONE ROCKS

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Abstract

LOW SALINITY WATER (LSW) HAS BEEN PROPOSED AS AN ENHANCED OIL RECOVERY FLUID IN RECENT YEARS. IT HAS BEEN BELIEVED CHANGE OBSERVED IN RECOVERY FACTOR DURING LSW FLOODING IS DUE TO WETTABILITY ALTERATION TO A MORE WATER WET STATE. ALTHOUGH WETTABILITY ALTERATION INFLUENCE ON RELATIVE PERMEABILITY AND CAPILLARY PRESSURE BUT A FEW RESEARCHERS TRIED TO STUDY SALINITY DEPENDENCE OF THESE PARAMETERS. TO THIS END, LSW FLOODING PERFORMED ON SANDSTONE ROCK AGED WITH CRUDE OIL IN PRESENCE OF CONNATE WATER. THE CAPILLARY PRESSURE AND RELATIVE PERMEABILITY CURVES OBTAINED BY INVERSE MODELING OF THE EXPERIMENTAL DATA OF PRESSURE DROP AND OIL PRODUCTION. THE RESULTS SHOWED OIL RELATIVE PERMEABILITY INCREASES AND CAPILLARY PRESSURE DECREASES WITH SALINITY REDUCTION BUT WATER RELATIVE PERMEABILITY DOES NOT CHANGE SIGNIFICANTLY. ALSO A LINEAR COMBINATIONS OF MEASURED LOW AND HIGH SALINITY OIL RELATIVE PERMEABILITY AND CAPILLARY PRESSURE MATCHED WELL WITH THE EXPERIMENTAL DATA OF MEDIUM SALINITY.

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