基于Level Set有限元方法的微观水驱油数值模拟  

Numerical simulation of microscopic water-oil displacement based on level set finite element method

作　　者：高亚军[1] 姜汉桥[1] 王硕亮[2] 刘传斌[1] 常元昊 王依诚 

机构地区：[1]中国石油大学(北京)石油工程教育部重点实验室,北京102249 [2]中国地质大学(北京)能源学院

出　　处：《石油地质与工程》2016年第5期91-96,141-142,共6页Petroleum Geology and Engineering

基　　金：国家重点技术研究发展计划(973计划)项目"致密油高效开发油藏工程理论与方法研究"(2015CB250905)

摘　　要：在微观水驱油实验的基础上,建立了二维微观孔隙模型;引入Level Set数学方法,结合N-S方程,建立了微观两相渗流数学模型,借助有限元方法,进行水驱油两相数值模拟,研究微观水驱油动态特征。研究了孔喉非均质性、润湿非均质性、油水两相黏度以及驱替压差对驱油效果的影响;通过对模拟结果中孔隙内流体的波及效率、两相界面的运移速度以及优势渗流通道的分析发现,Level Set方法能很好地处理各因素下油水两相界面的拓扑变化,为微观水驱油机理的研究提供了一种新的技术方法。Based on micro water oil displacement experiment,a two-dimensional micro pore model was established.Characterized by Level Set mathematical method,in combination with N-S equation,a micro two-phase percolation mathematical model was established.By use of the finite element method,the numerical simulation on oil-water displacement was carried out.Therefore,the characteristics of oil-water displacement,the influence of pore heterogeneity,wetting heterogeneity,oil/water two phase viscosity ratio,displacement differential pressure on displacement efficiency were studied.Based on the simulation results such as sweep efficiency of pore fluid,migration velocity of two phase interface,and preferential seepage channel analysis,the Level Setmethod can well deal with the topology change of oil-water two phase interfaces under various factors and provides a new method for oil displacement mechanism and micro twophase seepage characteristics.

关 键 词：水驱实验 数值模拟 微观驱替特征 

分 类 号：TE311[石油与天然气工程—油气田开发工程]