| 摘要 |
FIELD: oil and gas industry.SUBSTANCE: invention refers to oil and gas industry, and namely to drill fluids and compositions on water base, which are mainly used during drilling of unstable clay rocks. Drill fluid includes the following, wt %: highly colloidal bentopowder PMBV 6-15, water-soluble polymer - cationic coagulant Rosflok 99M 2-6, and water is the rest.EFFECT: improving inhibiting capability of drill fluid for clays; increasing salt tolerance and heat resistance.2 tbl |
