METHOD OF CARRYING OUT REPAIR AND INSULATION WORKS OF A PRODUCTION WELL BY TWO-COMPONENT BACKFILL COMPOSITION (TBC) Russian patent published in 2020 - IPC E21B33/138 E21B47/00

Abstract RU 2715391 C1

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil and gas production and can be used during repair of production wells by pumping of backfill composition into pores and rock cracks. Method comprises determining filtration and temperature parameters of disturbance interval, calculating optimum hardening time of two-component backfilling composition, production of a batch of two-component backfilling composition with specified properties, arrangement of tubing string in the well near the disturbance interval and pumping of the two-component backfill into the fault interval. Determination of disturbance interval parameters includes determination of temperature and permeability of disturbance interval. Optimal hardening time of the two-component backfill composition is calculated taking into account temperature and permeability of the fault interval. Pumping of two-component backfill composition is carried out taking into account composition hardening time till composition pressure reaches 25–30 MPa.

EFFECT: providing the possibility of sealing the water-bearing formation channels having different permeability nature, per one cycle of pumping of the two-component backfill composition.

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RU 2 715 391 C1

Authors

Rashevskij Vasilij Aleksandrovich

Dates

2020-02-27—Published

2018-09-25—Filed