大庆石油地质与开发2011，Vol.30Issue(3)：93-96,4.DOI:10.3969/J.ISSN.1000-3754.2011.03.019
超低渗岩石渗透率测试实验方法
EXPERIMENTAL METHOD TO MEASURE PERMEABILITY OF ROCK WITH SUPER-LOW PERMEABILITY
摘要
Abstract
The equivalently absolute permeability obtained by laboratory rock analysis is usually based on the correction of linear relationship between gas measurement permeability and average pressure recip. Study on gas measurement permeability experiment shows that for the rock with permeability lower than 0. 1 × 10-3μm2, the relationship between gas measurement permeability and average pressure recip is nonlinear, and the equivalently absolute permeability obtained by correction could be slightly smaller, even negative. The reasons for this are the extremely small radius of pore channel in the rock with super-low-permeability, the greatly increasing scale of the thickness of wall-slippage molecular layer to the radius of pore channel, and the strengthening contribution of slippage effect to flowing. Finally, according to the rarefied aerodynamics, the method of increasing the gas pressure at delivery end is proposed to effectively decrease the thickness of wall-slippage molecular layer, so as to decrease the contribution of slippage effect to flowing. The result shows that after increasing the gas pressure at delivery end, the relationship between gas measurement penneability and average pressure recip is linear, and the accurately absolute permeability could be obtained after correction.关键词
气测渗透率/超低渗岩石/滑脱效应/克林贝尔格公式/壁面滑移层Key words
gas measurement permeability/ super-low-permeability rock/ slippage effect/ Klinkenberg equation/wall-slippage layer分类
能源科技引用本文复制引用
魏浩光,岳湘安,张力,马国良,李雷..超低渗岩石渗透率测试实验方法[J].大庆石油地质与开发,2011,30(3):93-96,4.基金项目
国家科技重大专项"复杂油气田地质与提高采收率技术"资助(编号:2009ZX05009) （编号:2009ZX05009）
国家自然科学基金青年基金项目"油水在油藏孔喉中的流动和乳化机理研究"(50804051). （50804051）
