FIELD: oil industry, particularly for developing water-bearing non-uniform oil reservoir.
SUBSTANCE: method involves injecting aqueous solution containing dibasic ammonium phosphate; pumping lactoserum; additionally injecting aqueous solution of cellulose-containing material; extracting oil through production well. Aqueous solutions of dibasic ammonium phosphate and cellulose-containing material are injected separately or simultaneously in cyclic operation, then lactoserum is injected and technological time-delay is performed.
EFFECT: increased oil recovery due to usage cheap ecologically-friendly reagents by applying combined action on oil reservoir having non-uniform permeability.
4 ex, 1 tbl
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Authors
Dates
2005-11-10—Published
2004-03-23—Filed