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 2 Main parameters of the sedimentary environment of organic-rich shale in the main onshore basins in China.

Basin Formation Sedimentary facies Water nature Paleosalinity/ ‰ Paleoclimate Pozzolanic reaction Hydrothermal process Oxygen content Water stratification TOC/% Laminated shale Massive mudstone Ordos Chang 7 Member Semi-deep- deep lacustrine Freshwater- brackish water 4-8 Warm and humid Widely Widely Sulfuration-low Not obvious 6-30, on average 13.75 1-6, on average 3.74 Junggar Lucaogou Formation Semi-deep- deep lacustrine Offshore saltwater 16-30 Hot and dry Widely Limited Low- medium Obvious 5.0-16.1, on average 6.1 1-5, on average 3.2 Songliao Qingshankou Formation Semi-deep- deep lacustrine Freshwater, local transgression 1-3 Warm and humid Limited Limited Low- medium Not obvious 2.0-8.7, on average 3.4 0.9-3.0, on average 1.7