The invention discloses a well wall stabilizing method based on
formation water outflow prevention, and relates to the technical field of
petroleum drilling, and the well wall stabilizing method comprises the following steps: 1, connecting a spraying tool on a drilling tool, drilling and expanding the inner
diameter of a well wall of a to-be-cured area; 2, putting in a throw-in
coating loading cylinder; 3, controlling the throw-in type paint loading cylinder to be connected with the spraying tool; 4, controlling the
resin coating to enter the spraying tool and spray the
resin coating to the well wall; 5, the drilling tool is static to solidify the curing resin; sixthly, the fourth step is repeated, and the catalytic
coating is continuously sprayed to the
resin coating; seventhly, the drilling tool is lifted upwards, the resin
coating and the catalytic coating enter the microcracks, and a water outlet prevention
isolation layer is formed; and 8, downward drilling continues, the step 1-the step 7 are repeated, and stabilization of the well wall of the rest to-be-cured area is completed. According to the method, a tight
isolation layer can be formed on the well wall by using the sprayed cured resin in the drilling process, so that the effect of effectively preventing water from flowing out of the well wall is achieved, and an effective
technical support is provided for on-site rapid drilling construction.