WELLBORE RECONSTRUCTION METHOD FOR REPEATED FRACTURING OF OIL-GAS WELL

The present application provides a wellbore reconstruction method for repeated fracturing of an oil-gas well. The wellbore reconstruction method comprises: determining operating conditions of a production sleeve in an oil-gas well to be constructed; determining a placement position of an expansion pipe according to the requirement of repeated fracturing and the operating conditions of the production sleeve; and placing the expansion pipe in a placement position in the production sleeve, expanding the expansion pipe to make same abut against an inner wall of the production sleeve, and plugging an original perforated interval to form a new wellbore, so as to complete wellbore reconstruction of the oil-gas well to be constructed; and reperforating and fracturing the new wellbore. According to the present application, targeted plugging is carried out on a perforated interval in the oil-gas well to be constructed by means of the expansion pipe, such that the plugging effect is good; in addition, the expansion pipe