Oil recovery by enhanced imbitition in low permeability reservoirs
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United States of America Patent
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May 2, 1995
Grant Date -
N/A
app pub date -
Dec 9, 1993
filing date -
Dec 9, 1993
priority date (Note) -
Expired
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Abstract
A method for enhanced oil recovery from a low permeability diatomaceous reservoir by imbibition is described. In this method, oil is displaced from a single injection well, or series of injection wells into a single producer or series of producing wells by a combination of applied fluid pressure, plus 'enhanced imbibition.' Enhanced imbibition is accomplished by adding chemical additives to the injection fluid so that rock in the tight reservoir has a stronger affinity for the water present therein, thus releasing oil from the rock.
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