FIELD: oil and gas industry.
SUBSTANCE: invention relates to the oil industry, namely, to the technology of killing oil wells with a high gas factor, as well as oil and gas wells that have opened reservoirs with abnormally low or abnormally high reservoir pressure. Method according to the first embodiment, applied when the wells are injected below 350 m3/day, includes sequential injection into the bottomhole zone of the blocking pack, securing the pack and the drilling fluid. As a blocking pack, an emulsion system containing diesel fuel or prepared oil from a point of preparation and pumping of oil is used, emulsifier, a colloidal solution of silica nanoparticles, an aqueous solution of calcium chloride or potassium chloride. As a fixing pack, an emulsion-suspension system is used containing diesel fuel or prepared oil from a point of preparation and pumping of oil, an emulsifier, a colloidal solution of silica nanoparticles, dry amorphous silica, an aqueous solution of calcium chloride or potassium chloride. As the drilling fluid, an aqueous solution of calcium chloride or potassium chloride with a surfactant content is used. Second variant is used when injecting wells above 350 m3/day and is similar to the first, while an emulsion-suspension system containing diesel fuel or prepared oil from a point of preparation and pumping of oil is used as the fixing pack, emulsifier, a colloidal solution of silica nanoparticles, microparticles of ilmenite or trimanganese tetraoxide, an aqueous solution of calcium chloride or potassium chloride.
EFFECT: increasing the technological efficiency of work to shutdown oil wells with a high gas factor and oil and gas wells complicated by abnormally low or abnormally high reservoir pressure.
2 cl, 6 dwg
