摘要
达西定律是渗流的基本规律,但低渗透致密气藏的渗流还有其特殊性,启动压力和气体的“滑脱效应”同时存在,两种现象的研究又似乎相互矛盾。基于对低渗气藏渗流机理分析,利用渗流理论进行研究和推导,考虑启动压力和“滑脱效应”的双重影响,探讨和研究了二者对渗流规律的影响,得出当滑脱效应和启动压力影响相当时,低渗透气藏中非达西效应消失的现象。为进一步开展低渗透气藏渗流理论研究,油藏工程研究和动态分析建立了基础。
Darcy law is the principle law of percolation theory, but percolation of low permeability gas reservoir has its specific characteristics because of the simultaneity of kickoff pressure and gas slippage effect, and the study on them seems to be contradicted. Based on percolation mechanism analysis of low permeability, considering the percolation theory and dual influence of kickoff pressure and gas slippage effect, this paper has studied their influence on percolation mechanism and concluded that non - Darcy effect in low permeability gas reservoir may disappear when gas slippage effect is equal to kickoff pressure, which provides foundation for further study on percolation theory reservoir, engineering research and dynamic analysis in low permeability gas reservoir.
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2007年第1期65-67,共3页
Petroleum Geology & Oilfield Development in Daqing
关键词
气体
低渗透
渗流
滑脱
启动压力
gas
low permeability
percolation
slippage
kickoff pressure
