Enhanced hydrocarbon recovery by permeability modification with phenolic gels
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United States of America Patent
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Nov 24, 1987
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N/A
app pub date -
Oct 1, 1984
filing date -
Oct 1, 1984
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Expired
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Abstract
Hydrocarbon recovery from subterranean reservoirs that are penetrated by either injector or producer wells is enhanced by selective permeability modification of the strata of the reservoir with gel-forming phenolic compositions. The injection of the phenolic composition follows a pH sequence specific to the reservoir environment which allows emplacement of the gel-forming composition the desired distance away from the wellbore and production of a uniform gel throughout the treated hydrocarbon-bearing reservoir. The permeability of a treated subterranean reservoir can be restored by treatment of the reservoir with either aqueous hypochlorite or mineral acid.
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