西安石油大学学报（自然科学版）2026，Vol.41Issue(3)：65-72,82,9.DOI:10.3969/j.issn.1673-064X.2026.03.007
延安气田致密砂岩储层物性下限界定
Determination of Lower Limits of Physical Properties of Tight Sandstone Reservoirs in Yan'an Gas Field
摘要
Abstract
The Yan'an gas field is characterized by strong reservoir heterogeneity and complex pore structure,which pose great challen-ges to determining the lower limits of reservoir properties.The commonly used empirical coefficient method,mercury intrusion parameter method,and nuclear magnetic resonance method have significant differences in determining the lower limits of reservoir properties.In this article,the weights of the lower limits of reservoir properties obtained by different methods were analyzed using the analytic hierar-chy process,and the lower limits of physical properties of tight sandstone reservoirs in Yan'an gas field were comprehensively calculated using the weighted average method.The results show that the lower limit of porosity in the Yan'an gas field reservoir calculated by vari-ous methods is 2.69%～6.92%,and the lower limit of permeability is(0.002 3～0.042 0)×10-3 μm2.By the analytic hierarchy process(AHP),it is known that the weight of the lower limit of porosity determined by the minimum pore throat radius of the movable fluid is maximum,while the weight of the lower limit of permeability determined by the mercury intrusion parameter method is maxi-mum.The lower limits of porosity and permeability in the tight sandstone reservoirs in the study area based on the weighted average method are 5.06%and 0.011 8×10-3 μm2,respectively.The research results can provide a reference for the exploration and develop-ment of tight sandstone gas reservoirs in Yan'an gas field.关键词
致密气藏/储层下限/核磁共振/孔喉半径Key words
tight gas reservoirs/reservoir physical property lower limit/NMR/pore-throat radius分类
能源科技引用本文复制引用
宋珈萱,谢小飞,乔向阳,王凯,刘鹏,李涛,李晨祥,郭雨嘉..延安气田致密砂岩储层物性下限界定[J].西安石油大学学报（自然科学版）,2026,41(3):65-72,82,9.基金项目
陕西省创新能力支撑计划项目"致密砂岩储层气水微观渗流机理研究及应用"(2024ZC-KJXX-132) （2024ZC-KJXX-132）
陕西省自然科学基础研究计划项目"多层合采气井全阶段产能劈分及预测研究"(2025JC-YBMS-644) （2025JC-YBMS-644）
