致密油藏直井体积压裂储层改造体积的影响因素

摘要

The typical fracture network models of vertical well were established based on Triassic Chang 7 tight reservoirs characteristics.The development effects of networks fracturing and regular fracturing numerical simulation models were compared.The effects of different fracture network pattern,fracture spacing and fracture network conductivity on stimulated reservoir volume(VSR) were discussed.The result shows that network fracturing could change the seepage environment,increase reservoir producing extent,and improve well performance greatly.The higher stimulated reservoir votume is created,the higher production is.When the VSR is an constant,the development effect is closely related to fracture volume which is the volume of fracture connecting well bore.The fracture spacing and fracture network conductivity have a significant impact on VSR.%基于三叠系长7致密储层地质特征建立直井典型缝网模型,利用数值模拟方法对体积压裂与常规压裂的开发效果进行对比,模拟不同缝网形态、裂缝间距及导流能力对体积压裂储层改造体积(VSR)的影响.结果表明:体积压裂改造方式能够改善油藏的渗流环境,增加储层动用程度,大幅度提高单井产能；储层改造体积越大,压后产量越高;相同改造体积下,开发效果与井筒连通的有效裂缝体积密切相关；裂缝间距及主、次裂缝导流能力对储层改造体积的影响较大.