FIELD: oil and gas industry.
SUBSTANCE: invention relates to the oil and gas production industry, namely, to technologies for liquidation of mud absorption during the construction (drilling) of oil and gas wells. Method comprises sequentially injecting a blocking pack and a drilling fluid into the formation. In this case, an emulsion-suspension system containing diesel fuel or prepared oil from the point of preparation and pumping of oil is used as the blocking pack, emulsifier, a colloidal solution of silica nanoparticles, dry amorphous silica, microparticles of ilmenite or trimanganese tetraoxide, an aqueous solution of calcium chloride or potassium chloride. In this case, an aqueous solution of calcium chloride or potassium chloride is used as a drilling fluid.
EFFECT: technical result is an increase in the technological effectiveness of measures to eliminate the absorption of drilling mud in high permeability formations or seams with anomalously low reservoir pressure, simplification of the preparation of the blocking composition in field conditions, the possibility of regulating the rheological parameters of the compositions both under surface conditions and during their movement in the drill string.
7 cl, 7 ex, 4 dwg
