The invention relates to a method for implementing
oil well deep part selective water plugging by utilizing waste
polystyrene foam plastic. The method comprises the following steps: preparing a plugging agent solution : adding 100 parts by weight of waste
polystyrene foam plastic to 5-15 parts by weight of an
organic solvent, and stirring and dissolving at 40-60 DEG C to obtain the plugging agent solution; or further adding 10-200 parts by weight of diesel, stirring and mixing to obtain the plugging agent solution, wherein the
organic solvent is selected from one or more of methylbenzene,
xylene,
methyl acetate,
ethyl acetate and
acetone; adding the plugging agent solution to diluted
crude oil and / or diesel as
carrier fluid to obtain plugging agent oil liquid, and annularly extruding the plugging agent oil liquid from an oil jacket to the stratum; jacking the plugging agent oil liquid into the deep part of the stratum by utilizing displacing liquid; closing the
oil well for 1-2 days, and then opening the
oil well normally for production. According to the method for implementing the oil well deep part selective water plugging by utilizing the waste
polystyrene foam plastic, the method for implementing oil well deep part selective water plugging is realized by utilizing waste polystyrene foam plastic;
effluent can be effectively controlled at a
water layer, and no
pollution and damage to an oil layer are realized.