低渗透油层扩张-收缩孔道流动规律新模型及应用  

A NEW MODEL FOR FLOW LAWS IN EXPANSION-CONTRACTION PORE PATHS IN LOW-PERMEABILITY RESERVOIR AND ITS APPLICATION

作　　者：冯玉良[1] 陈玉林[2] 计秉玉[3] 张媛[4] 穆文志[5] 

机构地区：[1]南京理工大学自动化学院,江苏南京210094 [2]大港油田公司第五采油厂,天津300283 [3]中国石化石油勘探开发研究院,北京100083 [4]大庆石油学院,黑龙江大庆163318 [5]大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712

出　　处：《大庆石油地质与开发》2010年第5期84-89,共6页Petroleum Geology & Oilfield Development in Daqing

基　　金：国家自然科学基金资助（No.50634020） 黑龙江省自然科学基金资助项目（cc05s305）.

摘　　要：低渗透油层孔隙结构复杂、喉道细小、孔喉比大,非达西现象严重是制约其进一步提高采收率的主要原因.在国内外关于微流体流动、非达西渗流规律等研究成果的基础上,对水驱油微观流动、多孔介质内微观作用力进行了研究,建立了微孔道内固液相互作用条件下的流体黏性系数表达式、二维流动控制方程以及相应边界条件,并进行求解计算,给出了考虑固液作用、不考虑固液作用2种情况下扩张-收缩流道流体的流动规律.数值计算表明,考虑固液作用条件下,对流体速度、切应力和流线分布均有较大程度影响.For low-permeability reservoirs, the enhancement of recovery factor is mainly limited by complex pore structure, tiny throat, large pore-throat ratio and serious non-Darey phenomenon. Based on the research of microfluid flow and non-Darcy flow laws at home and abroad, this paper studies the microflow of displacement of oil by water and the micro-acting force in porous medium, establishes the expression of fluid viscidity factor under the condition of solid/liquid interaction in micro pore paths, the gonverning equation for two-dimensional flow and the corresponding boundary conditions, and conducts resolution and computation, giving the flow laws of fluid in expansion-contraction channel under two circumstances with and without considering solid/liquid interaction. Numerical computation shows that when solid/liquid interaction is considered, the fluid velocity, shearing stress and flow line distribution are affected considerably.

关 键 词：低渗透 微观作用力 边界层 数值模拟 扩张-收缩 微观流动 

分 类 号：TE312[石油与天然气工程—油气田开发工程]