PROCESS OF EXPLOITATION OF OIL FIELD Russian patent published in 2001 - IPC

Abstract RU 2175056 C1

FIELD: oil industry, development of inhomogeneous oil deposit. SUBSTANCE: oil is recovered in correspondence with invention through production wells. Working substance is pumped through injection wells. Suspension of water-soluble polymer in hydrocarbon liquid is injected into wells. Suspension of 1.6-2.5 % concentration is used in process. Well is filled with water-free oil before injection of suspension of water-soluble polymer in hydrocarbon liquid. Suspension is pumped through tubing string sunk below perforation interval at rate of 2.0-3.0 cu m/m of isolated interval. First technological curing is conducted in the course of 20- 30 h when gel of water-soluble polymer starts formation in pores of drowned part of pool. Volume of liquid equal to injected volume is smoothly recovered in the course of 1.5-2.5 days. Second technological curing in the course of 20-30 h is conducted for final formation of gel of water-soluble polymer. Then well is put in production. EFFECT: enhanced oil recovery from oil field due to stronger fixing of water-soluble polymer in pool.

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RU 2 175 056 C1

Authors

Chikin A.E.

Dates

2001-10-20Published

2001-02-26Filed