页岩气储层水力压裂机理研究

水平井分段压裂技术是现阶段页岩气成功开发的关键技术,并逐渐形成了一系列以实现"体积改造"为目的的页岩气压裂技术,其"体积改造"的理念颠覆了经典水力压裂理论,是现代非常规储层压裂理论发展的基础。到目前为止,页岩气储层水力压裂缝网形成与扩展机理等基础理论还不完善;通过室内大型真三轴水力压裂物理模拟实验,在室内模拟出含裂缝的页岩地层,研究了裂缝性地层水力压裂过程中天然裂缝对水力裂缝扩展的影响;并分析了水力裂缝在该类型地层中的扩展模式及其影响因素。

Mechanism study of hydraulic fracturing of shale gas reservoir

Horizontal wells multistage fracturing technology is the key technology to successful development of shale gas, and gradually formed a series to achieve the "volume fracturing" for the purpose of shale gas fracturing technology, the "volume fracturing" concept subversion of the classical theory of hydraulic fracturing, is a based theory of modern unconventional reservoir fracturing. So far, the fracturing of shale gas reservoir and propagation mechanism of network is not perfect, the paper through a large tri-axial physical simulation hydraulic fracturing experiments to simulated process of hydraulic fracturing in fractured formation to investigate the influence of natural fractures on hydraulic fracture extended, and analyzes the hydraulic fracture in the formation of this type of expansion mode and its influencing factors.