The invention relates to a method for increasing the yield of an oil gas well by controlling water pressing crack, in particular to water control pressing crack technology which takes a jelly glue
system capable of automatically reducing the
viscosity when encountering
bottom water as a pressing crack liquid and
wax-coated sand as partial supporting agent. At present, when hydraulic pressing construction is performed on low permeating
bottom water oil
pool, because the stress difference between
layers is small or no interlayer forms the stress difference between the
layers, the extending of cracks in the vertical direction can be effectively prevented, cracks formed by the hydraulic pressing crack extend and enter a
water layer on the bottom in the vertical direction and jump to flow into a shaft along the cracks, and violent flooding of an
oil well is generated. When pressing crack construction is carried out, the method adopts a coated supporting agent formed by mixing a
thickening agent and a cross-linking agent carrying
wax and
quartz sand to undergo chemical degradation to coat and block so as to form a
blocking layer. The method effectively solves the problems that the prior manual shielding layer cannot effectively prevent the
oil well from being flooded by water, and a pressing crack liquid carrying a diversion agent or a temporary plugging agent cannot reduce
viscosity basically when encountering the water and has slower
settling.