石油实验地质2016，Vol.38Issue(4)：438-444,452,8.DOI:10.11781/sysydz201604438
埋藏条件下页岩气赋存形式研究
Shale gas occurrence under burial conditions
摘要
Abstract
Shale samples were collected from the Longmaxi Formation in southeastern Sichuan Basin to carry out quan⁃titative studies of shale gas occurrence under burial conditions. The impacts of TOC content, temperature and moisture on adsorption capacity were studied using gravimetric isothermal adsorption, and some related empirical equations were established to calculate adsorbed gas content under burial conditions. In addition, free gas storage space was derived by deducting the volume of pore water and adsorbed gas from total space. The density of free gas was calculated using the Peng⁃Robinson equation. Therefore, a quantitative calculation method for shale gas occurrence was proposed. Under overpressure condition, adsorbed gas content decreases with the increase of burial depth, while free gas content increases and becomes dominant. Shale gas content of well Jiaoye1 was calculated using 22 samples mainly from 38 m interval. The adsorbed gas fraction is 27. 1%-47. 8% with an average of 34.3%, and the free gas fraction is 52.2%-72.9% with an average of 65.7%.关键词
赋存特征/吸附气/游离气/页岩气/龙马溪组/川东南Key words
storage occurrence/adsorbed gas/free gas/shale gas/Longmaxi Formation/southeastern Sichuan Basin分类
石油、天然气工程引用本文复制引用
俞凌杰,范明,腾格尔,刘友祥..埋藏条件下页岩气赋存形式研究[J].石油实验地质,2016,38(4):438-444,452,8.基金项目
国家自然科学基金“古生界页岩含气性原生有机质控制作用研究”（ U1663202）资助。 （）
