利用升尺度模拟研究低渗透油藏渗流规律  

Study on seepage behavior in low permeability reservoir based on upscaling simulation

作　　者：姚军[1] 王晨晨[1] 汲广胜[1] 杨永飞[1] 李琪[2] 张雅玲[2] 

机构地区：[1]中国石油大学(华东)石油工程学院,山东青岛266580 [2]长庆油田公司勘探开发研究院,陕西西安710021

出　　处：《西安石油大学学报（自然科学版）》2013年第4期41-43,89,共4页Journal of Xi’an Shiyou University（Natural Science Edition）

基　　金：国家自然科学基金(11072268;51234007);教育部科学技术研究重大项目(311009);高等学校博士学科点专项科研基金资助课题(20120133120017);山东省自然科学基金项目(ZR2011EEQ002);中央高校基本科研业务费专项资金项目(11CX04022A);高等学校学科创新引智计划项目(B08028);长江学者和创新团队发展计划资助项目(IRT1294)

摘　　要：针对低渗透油藏的不同岩心样品,选取相应的二维薄片,用模拟退火算法构建三维数字岩心并提取相应的三维孔隙网络模型;以孔隙网络模型为研究平台,模拟水湿油藏条件下油水一次驱替和二次吸吮过程,获取各岩心样品的相对渗透率曲线;通过毛管力平衡法对相对渗透率曲线进行粗化,得到能够描述整个低渗透油藏的相对渗透率曲线.利用这种升尺度模拟方法可以研究低渗透油藏的渗流规律.Based on the 2D images of different core samples of low permeability reservoirs,the 3D digital cores are established using simulated annealing algorithm and the correspongding pore network models are extracted.Then,the primary flooding and the secondary imbibition processes of oil-water under the condition of water-wet reservoir are simulated on the pore network models,and the relative permeability curves of each core sample are obtained.At last,the relative permeability curve which can describe the seepage behavior in the whole low-permeability reservoir is obtained by upscaling of the relative permeability curves of core samples with capillary equilibrium method.This upscaling simulation method could be used to analyze the seepage behavior in low permeability reservoir, which provides a new method and a new idea for the development of low permeability reservoirs.

关 键 词：低渗透油藏 数字岩心 孔隙网络模型 升尺度模拟 相对渗透率曲线 

分 类 号：TE312[石油与天然气工程—油气田开发工程]