页岩储层水力压裂裂缝相互作用数值模拟研究

Numerical simulation study on the interaction of hydraulic fracture in shale formation

在大多数的低渗透油气藏中,特别是页岩储层中,通常发育着丰富的天然裂缝。所以在页岩储层水力压裂的过程中,人工裂缝与天然裂缝之间所存在的关系以及相互作用,是很有必要对其进行探索及研究的。本文应用Franc2D/L软件,进行了模拟试验,目的是分析出在水力压裂过程中,人工裂缝与天然裂缝有什么样的相互影响。从得出来的数据可以得到它们相互作用的结果,这一结论的获得能够为体积压裂效果评价打下基础。

In most low permeability reservoirs,especially shale reservoirs,abundant natural fractures are usually developed.Thus,it is necessary to study the interaction between artificial fractures and natural fractures in shale reservoirs.In this paper,respectively,simulate and analyze the interaction between artificial fractures and closed natural fractures as well as open natural fractures during hydraulic fracturing by Franc2D/L software.Through the numerical simulation,the results of the interaction between artificial fractures and natural fractures in the fracturing process are analyzed,which lays the foundation for the better evaluation of the volume fracturing effect.