Research and Application of Fracturing Method of High Water Cut Level Well in Thin Oil Layer

Daqing peripheral A oilfield developed thin inter-reservoirs with thin single-layer thickness, and began to apply the horizontal well development mode in 2002 to achieve the economical and effective use of hard-to-recover reserves. However, with the in-depth development of A oilfield, affected by factors such as plane and interlayer heterogeneity, the production of horizontal wells declined rapidly and entered the stage of high water cut. Based on the numerical simulation results, dynamic and static data analysis, field testing and other methods, this paper integrates the application of plug-pressure combination, longitudinal penetration, plane communication, and pressure supplementation and repeated fracturing transformation methods for different horizontal wells according to the characteristics and potential types of horizontal wells, and forms a fracturing and production enhancement technology suitable for high water cut horizontal wells suitable for thin oil reservoirs. Since the “13th Five-Year Plan”, 53 high-water-cut horizontal wells have been renovated on site, with an initial daily oil increase of 5.0 t and a single well cumulative oil increase of 1492 t, which effectively improves the development effect of oilfields and provides reference and guidance for the effective development of similar hard-to-recover reserve resources.