水力喷射压裂工艺在郑庄里必区块煤层气开发中的应用

Application of Hydrojet Fracturing Technology of CBM Exploitation in Zhengzhuang Libi Block

水力喷砂压裂是一种利用水射流独特性质的储层改造技术,集水力喷砂射孔和水力压裂于一体,起裂机理与常规水力压裂有所不同,能够避免传统射孔压裂完井方式对煤层造成的负面影响,对常规L型水平井有着很好的适用性。现场应用结果表明,产气效果优于目前的直井及多分支水平井,该工艺为低渗透煤层气藏的开发提供了新思路。

Hydrojet fracturing, which combines sand jet perforation and hydraulic fracturing, uses spe- cial hydrojet for reservoir improvement. The fracture initiation mechanism, which is very compatible to L- type horizontal well, is different with conventional hydraulic fracturing which will cause negative influence to coalbed. On-site application results show that the production of hydrojet fracturing is better than straight well ment of low and multi-branch horizontal well. This technology supplies a new thinking for the develop- permeability coalbed methane reservoir.