GAS WELL PAYOUT BED KILLING METHOD Russian patent published in 2009 - IPC E21B43/12 C09K8/42 

FIELD: oil and gas industry.

SUBSTANCE: invention refers to oil and gas producing industry and can be used for payout bed killing or temporary blocking before repair operations or conservation of gas well of low reservoir pressure. Method of gas well payout bed killing includes sequential well injection of killing liquid containing, wt %: chlorinated hydrocarbon liquid trichloroethylene or a hydrocarbon heavy fluid, or composition "АПК" 10-60, polymethyl hydrosiloxane 0.3-0.4, hydrocarbon liquid condensate or diesel fuel the rest. Thereafter it is forced through into the payout bed, injection of blocking liquids containing, wt %: 11% aqueous calcium chloride solution 36-44, emultal 2-3.5, lubricating additive 1-2, chalk 1.8-2.0, asbestos 2.8-3.0, 0.3% aqueous carboxymethyl cellulose solution 5.8-6.2, hydrocarbon liquid condensate or diesel fuel the rest. Blocking liquid is placed within killed payout bed with injection of squeesing liquid providing delivery of first two liquids to bottom hole and payout bed.

EFFECT: gas well killing accompanied with minimum detrimental effect on filtration capacity of gas collector of acid highly mineralised residual water saturation.

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