摘要
为了解裂缝性储层中复杂裂缝网络的变形特征及其对整个渗流介质渗透率的影响,假设岩石基质为各向同性线弹性体,建立了一组平行裂缝变形计算模型,并研究了流体压力及基质、裂缝的弹性参数、几何参数对裂缝变形、裂缝渗透率的影响,研究了整个渗流介质渗透率张量的变化规律,最后通过物理模拟实验验证了该模型的准确性。研究结果表明:裂缝变形量随孔隙流体压力增大而增大,随弹性模量增大而减小;裂缝渗透率随裂缝间距增大而减小;裂缝倾角在0°～90°变化时,裂缝渗透率呈先增大后减小的趋势;渗流介质的渗透率最大主值方向始终沿着裂缝发育方向。
In order to obtain the deformation characteristics of complex fracture nelworks in fractured reservoir and their eflects on the permeabiliU of seepage medium, assuming the rock matrix as an isotropic linear elastomer, a model for calculation of a set of parallel fractures deformation was established. The influences of fluid pressure, elastic and geometric parameters on fracture deformation and permeability, and the variation of permeabiliU tensor throughout the seepage medium were studied. Finally, the accuracy of the model was verified by physical simulation experiments. The resuhs show that the fracture deformation increases with the increase of fluid pressure and decreases with the increase of elastic modulus. Fracture permeabiliU decreases with the increasing of fracture spacing. When fi＇acture angle changes from 0° to 90°, the fracture permeability increases first and then decreases. The direction of the maximum principal value of permeabiliU is always along the fracture direction.
作者
冯月丽
刘月田
丁祖鹏
陈健
毛小龙
周月波
FENG Yueli;LIU Yuetian;DING Zupeng;CHEN Jian;MAO Xiaolong;ZHOU Yuebo(State Key Laboratory of Petroleum Resources and Prospecting,China University of Petroleum,Beijing 102249,China;CNOOC Research Institute,Beijing 100028,China;Petroleum Engineering Institute,Zhongyuan OUfield Company,SINOPEC,Puyang 457001,China)
出处
《断块油气田》
CAS
北大核心
2018年第6期736-741,共6页
Fault-Block Oil & Gas Field
基金
国家自然科学基金项目"各向异性裂缝页岩气藏渗流机理与理论研究"(51374222)
国家科技重大专项专题"中东典型碳酸盐岩油藏改善水驱开发效果关键技术研究"(2017ZX05032-004-002)
国家重点基础研究发展计划(973计划)课题五之专题"致密油藏产能预测方法"(2015CB250905)
关键词
一组平行裂缝
法向位移
变形特征
裂缝渗透率
渗透率张量
a set of parallel tractures
normal displacement
detormation characteristics
tracture permeability
permeability tensor
