METHOD FOR PHYSICO-CHEMICALLY ASSISTED MICROBIOLOGICAL STIMULATION OF OIL STRATUM Russian patent published in 2000 - IPC

Abstract RU 2153533 C1

FIELD: oil and gas production. SUBSTANCE: treatment of bottom zone and cleaning of downhole equipment from paraffin deposits are accomplished with microorganism suspension in aqueous solution of nutrients under optimal for microorganism vitality conditions in combination with physico-chemical action on stratum. Microorganisms utilized is biomass from protein-vitamin concentrate production with cell concentration 10¹⁰-10¹⁸ in 1 l (weight percentage of crude protein not below 50% on conversion to absolutely dry materials). Prior to treating stratum, casing string is perforated within productive stratum region. After treatment, stratum is intensely drained to remove mudding products and clogging agents using implosion and swabbing means. Before performing perforation operation, composition of nonionic hydrocarbon-based surfactants is applied. EFFECT: enhanced microbiological action on oil- stratum bottomhole zone in desired direction with no increased expenses on reagents. 2 cl, 1 tbl

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RU 2 153 533 C1

Authors

Ikhsanov V.B.

Dates

2000-07-27—Published

2000-01-14—Filed