华南地质2025，Vol.41Issue(2)：451-461,11.DOI:10.3969/j.issn.2097-0013.2025.02.017
低渗页岩储层渗透性的表征与计算
Characterization and Calculation of Permeability in Low-permeability Shale Reservoirs
摘要
Abstract
Aiming at the problem that the permeability calculated by Darcy's formula cannot accurately characterize the permeability of extra-low-permeability shale reservoir,this paper carried out the micro-circular tubes and real shale cores to determine the change of permeability under different flow rates,and improves the Klinkenberg formula of calculating permeability based on the micro-scale effect of gases in the micro-circular tubes.The results show that the permeability of single-phase fluids in extra-low permeability shale reservoirs is not constant due to microscale flow effect,which increases nonlinearly with the increase of flow rate(pressure)and tends to be stabilized when the flow rate(pressure)is increased to a specific value.The absolute permeability values of the actual cores calculated by the improved permeability formula at several pressure points have less than 5％margin of error,reflecting the significant advantage of the method in characterizing the permeability of the extra-low permeability reservoir.关键词
页岩储层/特低渗透率/微管/克氏渗透率方程Key words
shale reservoirs/extra-low permeability/micro-circular tubes/Klinkenberg equation分类
天文与地球科学引用本文复制引用
何柳..低渗页岩储层渗透性的表征与计算[J].华南地质,2025,41(2):451-461,11.基金项目
中国石油化工股份有限公司项目"红星及周缘地区二叠系天然气富集规律及预测技术研究(ZKD0224003)" （ZKD0224003）
