Development potential and technical strategy of continental shale oil in China

HU Suyun,ZHAO Wenzhi,HOU Lianhua,YANG Zhi,ZHU Rukai,WU Songtao,BAI Bin,JIN Xu

Table 1 Main source-reservoir assemblage types, parameters and technical routes of continental shale series in China.

Types Key shale series Favorable area/ km2 Porosity/ % Typical initial and cumulative oil production of single well Technical route Source- reservoir in one Lucaogou Formation in Jimusaer sag 2000 8-20 Well Ji 172_H: initial production of 69.46 t/d, cumulative production of 20 542 t Risk exploration in medium-high maturity shale area by using horizontal well and volume fracturing Lucaogou Formation in Santanghu sag 937 7-15 Well Malu 2: initial production of 8.27 m3/d, cumulative production of 124 m3 in 35 d The second member of Kongdian Formation in Cangdong sag 260 6-13 Well Guandong 1701H: initial production of 75.9 m3/d, cumulative production of 1812 m3 Separated source and reservoir The middle and lower parts of Chang 7 Member in the Ordos Basin 20 000 6-12 Well Yangping 7: initial production of 13.39 t/d, cumulative production of 37 454 t Risk exploration in medium-high maturity shale area by using horizontal well and volume fracturing Qingshankou Formation in the Songliao Basin 20 000 5-15 Well Long 26-Ping 8: initial production of 26.6 t/d, cumulative production of 18 890 t Pure shale Da'anzhai Member in the Sichuan Basin 20 000 4-6 Under test Risk exploration in medium-high maturity shale area, on-site test of in-situ heating conversion in organic-rich shale with medium-low maturity The lower submember of Chang 7 Member in the Ordos Basin 15 000 1-3 Well Geng 295: initial production of 1.5 t/d, cumulative production of 625 t Qingshankou Formation in the Songliao Basin 15 000 2-6 Well Hei 197: initial production of 20.04 m3/d, cumulative production of 310 m3