FIELD: oil and gas industry.
SUBSTANCE: invention is related to oil industry and may find application in operation and making of well horizontal hole in oil beds, where areas of drilling agent absorption are available. Substance of invention: when isolating area of complete drain, at first mixture of oil, cement and calcium chloride is pumped in the following ratio: oil:cement:calcium chloride as 1:(1-4):(0.002-0.24) by volume - accordingly in volume of 6-12 m3. Mixture is held for 12-14 hours. Then cement mortar is pumped in, containing 2-6% of calcium chloride in volume of 6-18 m3 and held for up to 2 days. Well operation in the first 10 days in done at minimum flows and pressures, at which well operation is possible.
EFFECT: better reliability of complete drilling agent drain area isolation, increase of well debit and reduction of time required for oil resources workout.
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