摘要
研究致密油储层的渗流规律对致密油的有效开发具有基础指导意义。针对致密油储层,从固液相互作用机理出发对微纳孔隙中的流体进行黏性修正;在此基础上运用微元体法分析了微纳毛细管中考虑壁面固液相互作用的流体流动规律,并进一步提出了考虑固液相互作用的微纳孔隙储层渗流模型。研究结果表明:考虑微纳孔隙中固液相互作用时,微纳毛细管中的速度分布明显低于泊肃叶流,且管径越小,固液相互作用越大;与泊肃叶流的速度差越大。对于微纳孔隙储层,岩石的渗透能力较泊肃叶流流推导的渗流方程而言要小得多。
Research on tight oil reservoir seepage law is basic guidance for the effective development of tight oil. Focused on the tight oil reservoir, The solid-liquid interaction mechanism on the surface of the prosity and revises the fluid viscosity. On this basis, the law of fluid flow in the micro-nano capillary tube considered the solid-liquid interaction is revealed and proposes a porous flow model in the micro-nona prosity formation. The results show that the velocity distribution in the micro-nona capillary tube is significantly lower than the Hagen-Poiseuille flow. The smaller the tube diameter and the greater the solid-liquid interaction is,the greater the velosicty contrast compared to Hagen-Poiseuille flow. As for micro-nano reservoirs, the rock permeability is much smaller than the the model based on the Hagen-Poiseuille flow.
出处
《科学技术与工程》
北大核心
2013年第26期7624-7628,共5页
Science Technology and Engineering
基金
中国石油股份公司重大科技专项(2011B-2013)资助
关键词
致密油储层
固液作用
微纳孔隙
渗流模型
tight oil reservior
solid-liquid interaction
micro-nona prosity
porous flow model
