摘要
注气开发油藏已成为提高原油采收率的重要技术手段 ,对于高含水中后期油藏、注水困难的强水敏油藏和低渗透油藏以及注蒸汽不适合的稠油油藏 ,注气开采具有显著的效果。虽然达西定律描述了在孔隙介质中流体的宏观流动方式 ,但是它没有给出有关的分子弥散流动的情况。文章考虑了气驱过程中的分子弥散特征 ,用Fick扩散定律来描述分子的扩散运动 ,将达西定律和分子扩散定律相结合 ,建立了油藏多孔介质中气驱过程考虑弥散的气体渗流方程 ,为气驱过程多相渗流机理、油藏工程设计和数值模拟研究奠定了基础。
Gas injection has become one of significant tools for enhancing oil recovery. For the late term reservoirs with high water cut, the reservoirs with strong water sensitivity and low permeability for which water injection is difficult, and the heavy oil reservoirs which are not suitable for steam injection, gas injection is an effective method. Though Darcy′s law describes the macro flow model in porous media, it doesn′t consider the molecule′s dispersion flow. Considering the dispersion features in gas drive process, using Fick′s diffusion law to describe the molecule′s diffusion move, and combining Darcy′s law with the molecule′s diffusion law, the article establishes the gas percolation equation considering dispersion for gas injection process in the porous media of the reservoir, which makes a base for the further study on multi phase percolation mechanism, of gas drive process, reservoir engineering design and numerical simulation.
出处
《天然气工业》
EI
CAS
CSCD
北大核心
2004年第3期98-99,共2页
Natural Gas Industry
基金
"油气藏地质及开发工程国家重点实验室"开放基金资助项目(PLN990 1)
国家"九五"重点科技公关项目 (G96 -12 1- 0 7- 0 4 )资助
