密切割分段压裂技术在CN区块的应用

Application of Dense Cutting Staged Fracturing Technology in CN Block

CN区块页岩气水平井常规分段压裂后,存在压裂改造效果不理想、压后产量偏低且递减快等问题。为此提出了密集布缝的密切割分段体积压裂方式,在保障多条裂缝之间不产生相互干扰的前提下,增加分段数、减少分段段长,缩短簇间距、增大射孔簇数,加大施工规模,使体积压裂后裂缝网格更复杂,从而有效提高页岩气水平井的改造效果。

After conventional staged fracturing of shale gas horizontal wells in CN block,there are some problems,such as unsatisfactory fracturing effect,low post fracturing production and rapid decline.Therefore,the dense cut cloth closely piecewise fracturing is put forward.On the premise of ensuring that multiple fractures do not interfere with each other,the number of segments is increased,the length of segments is reduced,the cluster spacing is shortened,the number of perforation clusters is increased,and the construction scale is increased,making the fracture grid after volumetric fracturing more complex,so as to effectively improve the reconstruction effect of shale gas horizontal wells.