微纳米多孔介质中油-水、水-气两相渗流机理

项目名称： 微纳米多孔介质中油-水、水-气两相渗流机理

项目编号： No.11472246

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 数理科学和化学

项目作者： 宋付权

作者单位： 浙江海洋大学

项目金额： 86万元

中文摘要： 低渗透、特低渗透油藏、致密油气藏和页岩气藏开发中，多孔介质的孔隙尺寸从一微米到几十纳米，流体流动的微纳米尺度效应明显，流动阻力增大。对于单相流体在微纳米多孔介质中的渗流，渗流机理和特征已经渐渐明晰，特别是启动压力理论。但对于微纳米尺度下的油-水和水-气两相流动，渗流机理尚不清晰，而两相渗流几乎贯穿非常规油气藏开发的全部阶段，因此亟需进行相关渗流机理、理论和特征的研究。本项目拟从微观渗流模型实验、分子动力学模拟计算和宏观岩心的两相渗流实验三方面出发，研究油-水、水-气两相渗流过程中的边界层分布、启动压力特征和毛管力特征，获得微纳米尺度下的油-水、水-气两相渗流机理和渗流模型。微纳米尺度下两相渗流机理和理论的建立不仅可以补充微纳米流体力学的内容，还可以为非常规油气田提高采收率和开发设计提供理论基础。

中文关键词： 两相流；低渗透油藏；微纳米效应；致密油气藏；页岩气藏

英文摘要： In the development of low permeability, extra-low permeability reservoirs, tight oil and gas reservoirs and shale gas reservoirs, the pore size of porous media ranges from one micrometer to tens of nanometers, the micro-nano scale effects of fluid flow are shown more obviously, and the flow resistance increases. For single phase flow in micro-nano porous media, the flow mechanism and characteristics have been gradually clear, especially the threshold pressure gradient theory. But for micro-nano scales of oil-water and water-gas two phases flow, the flow mechanism is still unknown. And two phases flow almost throughout whole stages of the unconventional reservoirs development, therefore we need to research related flow mechanics, theory and characteristics. This project includes three aspects, such as micro flow physical modle experiments, the molecular dynamics simulation and two phases flow experiments of cores. The boundary layer distribution, the threshold pressure and capillary force characteristics will be researched in the seepage process of oil-water and water-gas two phases flow. So the flow mechanism and models of oil-water and water-gas two phases flow in micro-nano porous media will be obtained. The establishment of two phases flow mechanism and theories in micro-nano scale not only supplements the content of the fluid mechanics, but also provides the theoretical basis for the enhanced oil recovery and the development of unconventional oil and gas reservoirs.

英文关键词： two-phases flow;low permeability reservoirs;micro-nano effects;tight oil & gas reservoirs;shale gas reservoirs