中国中西部大型湖盆沉积体系域研究进展及页岩油气勘探*
吴因业1,4, 李国欣2, 吴洛菲3, 徐兆辉1,2,4, 龙国徽1,2, 方向1,4, 付蕾1, 张天舒1, 陶士振1

Advances on depositional systems tracts in large lake basins and shale oil and gas exploration in mid-western China
WU Yinye1,4, LI Guoxin2, WU Luofei3, XU Zhaohui1,2,4, LONG Guohui1,2, FANG Xiang1,4, FU Lei1, ZHANG Tianshu1, TAO Shizhen1
四川盆地侏罗系页岩油层段薄层沉积砂体微观特征 A—极细—细砂结构,分选中等,碎屑颗粒包括石英、长石、岩屑等,G17井,凉上段,2500.42 m,单偏光; B—石英表面较干净,多具波状消光,少量见次生加大, 长石表面可见轻微泥化,发育聚片双晶, 压实作用和胶结作用发育,G17井,凉上段,2500.42 m,正交光; C—岩屑包括泥质岩岩屑、硅质岩岩屑、砂岩岩屑、石英岩岩屑等,颗粒间填隙物主要为碳酸盐矿物(多为方解石,少量白云石),其次片状云母,少量泥质、硅质等,G17井,凉上段,2500.42 m,单偏光; D—孔隙—接触式胶结,G17井,凉上段, 2500.42 m,正交光