Early Paleozoic Extension-Compression Transition and Formation of a Paleo-Oil Reservoir System in the NW Sichuan Basin: Implications for Deeply Buried Hydrocarbon Accumulation

Figure 11

Model of deeply buried hydrocarbon accumulation and oil-gas zoning in the NSWSCD. (a) With a complete thermal cracking process, the gas storage center may have formed in the Dengying Fm at the eastern boundary of the MY-CN IS. (b) The oil reservoir and deeply buried gas reservoir were adjusted and reconstructed continuously on both sides of the No. 1 fault. (c) Paleo-oil reservoir (oil seeps, tar sand, and bitumen dykes) and deeply buried gas reservoirs formed from the Late Cenozoic.