FIELD: oil and gas production.
SUBSTANCE: formation insulation composition employed during pullout of hole is composed of 0.5-2.0% carboxymethylcellulose, 7-12% calcium chloride, 19-21% monoammonium phosphate, 0.05-1.00% anionic surfactant (Morpen), and water (balancing amount).
EFFECT: increased efficiency of insulation due to improved blocking properties, while preserving natural permeability and preventing swelling of clayey minerals resulting in preservation of structural-mechanical strength of rock.
3 ex
| Title | Year | Author | Number |
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