HYDROPHOBIC MICELLAR ACID-BASED COMPOUND FOR KILLING, DEVELOPMENT AND COMPLETION OF PRODUCING STRATA DRILLED WITH USE OF NON-AQUEOUS BASED MUDS Russian patent published in 2015 - IPC C09K8/42 C09K8/52 

FIELD: oil and gas industry.

SUBSTANCE: hydrophobic micellar acid-based compound for killing, development and completion of producing strata drilled with use of non-aqueous based muds includes water-soluble non-ionic surfactant (NIS) with hydrophilic-lipophilic balance (HLB) less than 12, floating agent Oksal, 5-20 wt % solution of sulphamic acid in ethylene glycol or 5-20 wt % solution of formic acid in ethylene glycol or their mixture in volume rate of 1:1-1:2 respectively with the following ratio of ingredients, wt %: the above acidic solution or the mixture of acids - 40-55; the above NIS 2-5; floating agent Oksal - the remaining part.

EFFECT: increased degree of colmatage removal from the bottomhole zone of the producing formation upon use of non-aqueous based muds, recovery of natural collecting properties of terrigenous water-sensitive reservoirs at stages of development, killing and completion of well drilled with use of non-aqueous based muds.

4 cl, 3 tbl