摘要
储层的力学特性对重复压裂的裂缝发育有一定的影响。为提高重复压裂的生产效果,利用Comsol有限元分析软件模拟计算,结合流固耦合理论,对地应力偏差等参数进行分析,确定各因素对裂缝转向的影响规律。利用正交试验法,进行多因素分析,确定各因素的影响权重,得到重复压裂裂缝转向距离的预测模型。结合具体区块的岩石力学参数和油层物性参数建立的转向距离与各因素的关系模型和评价图版,对目标区域重复压裂的可行性有着一定的指导意义。
The mechanical properties of reservoir will produce certain effect on the fracture development of refracturing. In order to improve the production effect of refractufing, using the simulation and calculation of the finite element analysis software Comsol and combined with the fluid-solid coupling theoly, some parameters such as ground stress deviation are analyzed and the inlluence law of various factors on the fracture reorientation is determined. Using the orlhogonal experiment method, multi-faetor analysis is condueted a,ld the influence weight of various factors is determined, then the forecasting model for the fracture reorientation distance of refraeturing can be obtained. Combined with the relationship models hetween reorientation distance huih on rock mechanics parameters and reservoir physical property parameters of the concrete blocks and various factors and the evaluation chart, the feasibility of refracturing on the target area has a certain guiding significance.
出处
《断块油气田》
CAS
2014年第3期364-367,共4页
Fault-Block Oil & Gas Field
基金
国家自然科学基金项目"基于应力-渗流-损伤多场耦合的清水压裂机理及储层筛选研究"(51274069)
关键词
重复压裂
裂缝转向距离
流固耦合
有限元数值模拟
影响因素
refracturing： fracture reorientation distance： fluid-solid coupling
numerical simulation of finite element
influence factor
