PreprintArticleVersion 1Preserved in Portico This version is not peer-reviewed
Accumulation model and lithologic reservoir formation in continental fault basin A case study of the Lithologic Reservoir of Nantun Formation in Tanan Sag, Mongolia
Liu, S.; Zhao, S.; Yang, X.; Zhang, J.; Yin, M.; Meng, Q.; Li, B.; Xia, Z. “Tri-in-One” Accumulation Model of Lithologic Reservoirs in Continental Downfaulted Basins: A Case Study of the Lithologic Reservoir of Nantun Formation in Tanan Sag, Mongolia. Processes2023, 11, 2352.
Liu, S.; Zhao, S.; Yang, X.; Zhang, J.; Yin, M.; Meng, Q.; Li, B.; Xia, Z. “Tri-in-One” Accumulation Model of Lithologic Reservoirs in Continental Downfaulted Basins: A Case Study of the Lithologic Reservoir of Nantun Formation in Tanan Sag, Mongolia. Processes 2023, 11, 2352.
Liu, S.; Zhao, S.; Yang, X.; Zhang, J.; Yin, M.; Meng, Q.; Li, B.; Xia, Z. “Tri-in-One” Accumulation Model of Lithologic Reservoirs in Continental Downfaulted Basins: A Case Study of the Lithologic Reservoir of Nantun Formation in Tanan Sag, Mongolia. Processes2023, 11, 2352.
Liu, S.; Zhao, S.; Yang, X.; Zhang, J.; Yin, M.; Meng, Q.; Li, B.; Xia, Z. “Tri-in-One” Accumulation Model of Lithologic Reservoirs in Continental Downfaulted Basins: A Case Study of the Lithologic Reservoir of Nantun Formation in Tanan Sag, Mongolia. Processes 2023, 11, 2352.
Abstract
According to the structural features, sedimentary evolution, types of sedimentary facies, source rocks features, diagenesis evolution, reservoir features and hydrocarbon formation mechanism, exploration status and hydrocargon resource potential, this article analyzed the major control fac-tors and hydrocarbon distribution rules of the lithologic reservoirs in continental fault basin. The research shows that three major control factors and one coupled factor (fractures act as a tie) in-fluence hydrocarbon formation of lithologic traps in Nantun Formation of Tanan Sag, which in-clude sand body types, effective source rocks and effective reservoirs. With the increase in depth, enough hydrocarbon generate in source rock under thermal evolution. Hydrocarbon generation and expulsion are more intensive when it comes to the depth threshold and critical conditions of hydrocarbon supplying are met. Traps that surrounded or contacted by source rock, or communi-cated by fault are qualified to form reservoirs. As buried depth increases, hydrocarbon genera-tion-expulsion intensity grows and the trap is more petroliferous. Hydrocarbon accumulation and reservoir formation are also controlled by sandbody accumulation conditions. When it meets the critical conditions of hydrocarbon generation and concrete oil and gas are charged in, better phys-ical properties of sandbody always indicate more hydrocarbon accumulation in the trap. Alloca-tion of sand type, effective source rock and effective reservoir is optimized under the effect of fractures, and coupled hydrocarbon reservoir with these three elements.
Keywords
Mongolia; Tanan sag; Fault basin; Lithologic reservoir; Fracturing; Hydrocarbon accumulation mode; Distribution of the oil reservoir
Subject
Environmental and Earth Sciences, Geophysics and Geology
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
