低渗透储层水力压裂三维裂缝动态扩展数值模拟  

3D numerical simulation of fracture dynamic propagation in hydraulic fracturing of low-permeability reservoir

作　　者：朱君[1] 叶鹏[2] 王素玲[1] 肖丹凤[3] 王慧[1] 

机构地区：[1]大庆石油学院机械科学与工程学院,黑龙江大庆163318 [2]大庆油田有限责任公司第四采油厂,黑龙江大庆163368 [3]大庆油田有限责任公司采油工程研究院,黑龙江大庆163453

出　　处：《石油学报》2010年第1期119-123,共5页Acta Petrolei Sinica

基　　金：中国石油天然气集团公司科技创新基金(2009D-5006-02-06)资助

摘　　要：随着低渗透油气藏的大量开发,迫切需要具有一套适用于现场实际使用的三维水力裂缝几何形态的预测软件。通过力学分析,依据流固耦合效应、岩石材料的非线性效应以及裂缝扩展的动态效应,建立了低渗透油层水力压裂三维裂缝动态扩展力学模型,运用有限元方法进行求解,实现了低渗透油层三维裂缝形成过程的动态描述。对肇38-271井进行了模拟计算。计算的裂缝形态与现场测试的裂缝形态对比表明,模拟计算平均误差率为10.7%,能满足工程精度要求。建立的低渗透储层三维水力裂缝的模拟方法和技术,可对低渗透储层条件下的水力压裂设计提供准确的预测手段,提高了低渗透储层水力压裂措施的成功率。The 3D fracture prediction software is very necessary in the development of low-permeability reservoirs.A 3D mechanical model for predicting fractures in the low-permeability reservoir was established on the basis of the mechanical analysis and considering the efficiency of the fluid-solid coupling,non-linearity of rock material and dynamic effect of fracture propagation.The 3D mathematical mode for description of fracture dynamic propagation was achieved using the finite element method.The simulation of the model in Well Zhao 38-271 shows that the mean error rate of the calculated fracture shape is 10.7 percent compared with that of on-site testing,which can meet the requirements of engineering precision.The new simulation method can provide reliable and accurate prediction ways for hydraulic fracturing design and improve the successive rate of hydraulic fracturing technology.

关 键 词：低渗透储层 流固耦合效应 水力压裂 三维裂缝动态 扩展力学模型 数值模拟 

分 类 号：TE311[石油与天然气工程—油气田开发工程]