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首页> 外文期刊>Current Science: A Fortnightly Journal of Research >Experimental study on the hydraulic fracture propagation in shale
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Experimental study on the hydraulic fracture propagation in shale

机译：页岩液压断裂繁殖的实验研究

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To realize the control on geometry of fracture network and improve the individual well production of shale gas reservoirs, hydraulic fracturing simulation tests of shale outcrops for horizontal well were carried out. This was based on an established true triaxial hydraulic fracturing simulation test system, to analyse the propagation and formation of a complex fracture network. The results show that the typical severe fluctuation of pump pressure during extension, is an obvious feature of hydraulic fracturing by Stimulated Reservoir Volume (SRV). Due to the large size and abundant natural fractures in shale specimens, the acoustic emission (AE) energy is weak during propagation of hydraulic fractures. However, fracture propagation can still be effectively determined to some extent, although relatively few AE events are detected. Hydraulic fractures from horizontal well initiate approximately along the maximal in situ stress. But the fractures gradually deviate from the orientation when extending. Branching, re-orientation or penetrating bedding planes and then interconnecting with natural fractures or weak beddings are the main mechanisms of the formation of complicated fracture networks.
机译：为了实现骨折网络几何形状的控制，提高页岩气藏的个性井生产，进行了水平井的页岩露头的水力压裂模拟试验。这是基于建立的真正的三轴液压压裂模拟试验系统，分析复杂骨折网络的传播和形成。结果表明，延伸期间泵压的典型严重波动是刺激储存量（SRV）的液压压裂的明显特征。由于页岩样本中的大尺寸和丰富的自然骨折，在液压骨折的传播过程中声发射（AE）能量较弱。然而，仍然可以在一定程度上有效地确定裂缝传播，但是检测到相对较少的AE事件。水平井的液压骨折大致沿着最大应力引发。但骨折延伸时骨折逐渐偏离定位。分支，重新定向或穿透床上用品，然后用自然骨折或弱床铺互连是复杂骨折网络的主要机制。

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