四川盆地东部涪陵地区自流井组陆相页岩储层微裂缝发育特征及其对页岩气富集的意义

王鹏威,张亚雄,刘忠宝,陈筱,李飞,郝景宇,王濡岳

Microfracture development at Ziliujing lacustrine shale reservoir and its significance for shale-gas enrichment at Fuling area in eastern Sichuan Basin

Pengwei WANG,Yaxiong ZHANG,Zhongbao LIU,Xiao CHEN,Fei LI,Jingyu HAO,Ruyue WANG

表1 川东地区下侏罗统页岩样品裂缝对样品孔隙体积贡献率

Table 1 Contribution of fracture to pore volume of Lower Jurassic shale in eastern Sichuan Basin

井名 深度/m 岩性 孔体积占比/% <2 nm 2~50 nm 50~200 nm >200 nm FY1 2 582.5 页岩夹灰质纹层 6.1 62.7 5.7 20.8 FY1 2 600.5 页岩夹灰质条带 8.3 58.3 5.4 23.3 FY1 2 629.6 灰黑色页岩 24.7 49.2 2.4 21.5 XL101 2 144.0 灰黑色页岩 6.5 54.8 7.4 25.7 XL101 2 150.5 灰黑色含介壳页岩夹灰质纹层 4.7 56.3 8.9 23.1 XL101 2 159.0 灰黑色含介壳页岩夹灰质纹层 5.7 46.4 4.8 36.5