FIELD: oil and gas industry, particularly for chemical treating of bottomhole formation zone, for elimination of differential pressure sticking during well drilling.
SUBSTANCE: composition includes ammonium containing substance and organic solvent. Above components are taken in the form solid particles suspended in organic solvent. The composition includes 1-70% by weight of mixture comprising ammonium containing substance and carboxylic acid and/or derivative thereof, wherein ratio between ammonium containing substance and carboxylic acid and/or derivative thereof is from 1:10 to 10:1. Method of clay removing from bottomhole formation zone involves injecting above composition in formation and displacing thereof with water having pH value of from 1 to 8.
EFFECT: reduced time of work performing, increased ability of intensification of fluid flow from formation; elimination of inorganic acid influence on bottomhole equipment corrosion.
2 cl, 2 dwg
| Title | Year | Author | Number |
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|
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