石油实验地质2018，Vol.40Issue(1)：44-50,7.DOI:10.11781/sysydz201801044
四川盆地涪陵地区五峰—龙马溪组页岩气层孔隙特征及对开发的启示
Pore features of shale gas layer in Wufeng-Longmaxi formations in Fuling area of Sichuan Basin and the application to development
摘要
Abstract
Shale porosity is an important factor affecting the gas-bearing capacity of shale. The pore characteris-tics of the upper gas layer from the Wufeng Formation to the first member of Longmaxi Formation were studied and compared with the lower gas layer by using argon plasma scanning electron microscopy ( SEM) , high pres-sure mercury intrusion and liquid nitrogen adsorption. Results show that the organic carbon content of the lower gas layer is high, the pores in the organic matter are dominant, the pore volume is mainly >0.02 mL/g, and the BET specific surface area is mainly >20 m2/g. The organic carbon content of the upper gas layer is low, the pores are mainly micro-fissures and clay mineral pores, the pore volume is mainly distributed from 0.016-0.02 mL/g, and the specific surface area is mainly 12-20 m2/g. Combined with a single well gas content test results, we found that organic carbon content has the best correlation with gas content, followed by specific surface area and porosity. An evaluation of the gas-bearing properties of the upper gas layer was carried out. Sub-layer⑧was considered as the best gas layer in the upper interval, while sub-layers ⑥ and ⑦ were the next best, and sub-layer ⑨ the worst.关键词
孔隙特征/页岩/页岩气/五峰—龙马溪组/涪陵地区/四川盆地Key words
pore characteristics/shale/shale gas/Wufeng-Longmaxi formations/Fuling area/Sichuan Basin分类
能源科技引用本文复制引用
刘尧文,王进,张梦吟,蔡进,卢文涛,沈童..四川盆地涪陵地区五峰—龙马溪组页岩气层孔隙特征及对开发的启示[J].石油实验地质,2018,40(1):44-50,7.基金项目
国家科技重大专项(2016ZX05060)和中国石化科技项目(P17014-3)资助. （2016ZX05060）
