PROCESS OF EXPLOITATION OF INHOMOGENEOUS STRATA Russian patent published in 1999 - IPC

FIELD: oil production, specifically, isolation of water encroached strata and absorption zones in well. SUBSTANCE: flooding and cyclic alternating pumping of components of polymer-dispersed system is carried out in correspondence with process. This system carries aqueous solution of partially hydrolyzed polyacrylamide and clay suspension. Each of then is forced through stratum with buffer volume of water. Binding agent is injected into polymer-dispersed system, expelling agent is pump-fed. Binding agent is additionally injected into buffer volume of water. It is injected or forced with aqueous solution of partially hydrolyzed polyacrylamide and/or clay suspension during one, several or all cycles of pumping of components of polymer-dispersed system. EFFECT: more complete extraction of oil from zones otherwise non effected. 1 tbl