Discovery of mega-thick oil sandstone and asphalt in the Jurassic System in the Tula Basin and its significance

The mega-thick oil-bearing sandstone has been discovered in the Jurassic System in the Tula Basin, among which there are asphalt veins in fractures. The crude oil from oil-bearing sandstone and asphalt in the basin is mature, and similar to that of the Jurassic crude oil in the Qaidam Basin in geochemistry. The discovery not only shows that the Tula Basin can generate hydrocarbon and take on great exploration prospects but also has great implications for the oil and gas exploration in the Qaidam Basin.