复杂断层油藏蒸汽注采过程的自适应网格法  

Adaptive mesh refinement algorithm for steam injection process in complex faulted reservoir

作　　者：施安峰[1] 王晓宏[1] 贾江涛[1] 吴斌[1] 

机构地区：[1]中国科学技术大学热科学和能源工程系,安徽合肥230027

出　　处：《华中科技大学学报（自然科学版）》2012年第3期118-122,共5页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(11172295);中国科学院知识创新工程重大项目(KJCX1-YW-21);国家高技术研究发展计划资助项目(2006AA06Z228)

摘　　要：对复杂断层油藏蒸汽注采过程采用自适应网格法进行了数值研究,将断层处理成绝对渗透率极低的介质,而不是内边界.当利用自适应网格法划分网格时,并没有将断层区域处理成细网格,而是当蒸汽锋面尚未波及时自适应地采用粗网格.对于最精细层上含有断层的网格的渗透率提出了简单的计算方法,在此基础上利用重正化方法计算自适应网格各层粗网格的等效渗透率.数值结果表明:断层附近物理量变化较缓时采用较粗层次的网格不影响计算精度,采用自适应网格法可以大幅度地提高复杂断层油藏蒸汽注采过程的计算速度.The adaptive mesh refinement（AMR） algorithm was applied to the numerical simulation of steam injection process in complex faulted reservoir.Faults in reservoir were treated as porous media with ultra-low absolute permeability rather than internal boundary.Coarse grids were applied around the faults in the simulation until the steam front arrived.A simple method was given to calculate the permeability of the finest grids crossed by faults and the renormalization method was adopted to calculate the effective permeability of the coarse grids in the AMR multi-level grid system.Numerical results show that the proposed AMR technique has high calculation speed and has good accuracy compared with the fine-grid solution.

关 键 词：复杂断层油藏 蒸汽注采 自适应网格法 重正化方法 等效渗透率 

分 类 号：TE357.9[石油与天然气工程—油气田开发工程] O359[理学—流体力学]