涪陵焦石工区页岩气上部气层压裂技术探讨

On Fracturing Technology in the Upper Shale Gas Layers in Jiaoshi Area of Fuling Gas Field

涪陵焦石工区二期工程为增加区块页岩气储量并提高区块的供产能力,把上部气层开发纳入滚动开发范畴。在开发中,由于上部气层地层深、水平井段长、施工压力高,现场先后采用密切割体积压裂工艺、高强度连续加砂技术、段内多簇簇间投球暂诸技术等,增加裂缝复杂程度,提高储层采出程度,达到降本增效要求,为进一步优化页岩气压裂试气工艺奠定基础。

In order to increase shale gas reserves and improve the production capacity in Phase II Project of Jiaoshi area in Fuling gas field,the development of the upper shale gas layers was incorporated in the progressive development plan.Owing to the deeper depth,long horizontal section and high operation pressure in the upper layers,the intensive stimulated reservoir volume fracturing technology,high-load continuous sand technique,and temporary plugging technique by landing balls in between multiple clusters per stage,were adopted to increase the complexity of fractures,improve the reservoir recovery rate and achieve the cost-effectiveness,which lays the foundation for further optimizing the shale gas fracturing and testing technology.