通过改变近井地应力场实现页岩储层缝网压裂

体积压裂是对非常规储层进行高效改造的最主要手段之一，目前国内外对于体积改造技术的关注多集中在对水平井分段多簇压裂的优化方面。在深入分析诱导应力的计算方法及其对处理区域动态应力场形成所起到的决定性作用基础上，提出了通过控制诱导应力实现垂直于井筒方向缝网形成的方法。在压裂中，依靠原始地应力资料有目的地设计第1次压裂，产生需要的诱导应力，从而在第2次压裂中形成网状裂缝，这种通过改变近井地应力来实现缝网的方法在实际应用中取得了较好的效果。依据不同类型页岩储层特点进行优化设计和配套工艺改进，对非常规储层的体积改造具有重要意义。

Net fracturing by changing the surrounding in-situ stress in shale reservoirs

Stimulated reservoir volume(SRV)has became one of the most important methods to effectively stimulate unconventional reservoirs, and the concern about SRV technology mainly focus on optimization of staged fracturing with different clusters in horizontal wells. The further analysis on calculating method of induced stress and the determination faction of the induced stress in dealing with regional dynamic stress field have been made to put forth the method for the fracture net come into being in the direction...