FIELD: oil and gas industry.
SUBSTANCE: in clay cake removal method of bottom-hole zone, which involves pumping of clay cake removal material, process exposure and development of well, clay cake removal material is pumped in two margins with equal volumes; the first margin includes the following composition as clay cake removal material including the following, wt %: 0.1-2 surface active substance ML-81 B, 0.1-5 sodium hydroxide, 0.05-5 water-soluble polymer and water is the rest; and the second margin contains the compound as clay cake removal material including the following, wt %: 0.1-2 surface active substance ML-81B, 0.1-5 sodium hydroxide, and water is the rest.
EFFECT: increasing the action efficiency.
3 ex
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