Simulation of Hydrocarbon Generation History of Upper Paleozoic Source Rocks in Block X on the Eastern Edge of Ordos Basin

Block X is a new area of tight gas in the eastern part of the Ordos Basin, and the research on natural gas enrichment law in this area is relatively few. Therefore, it is of great significance to study the hydrocarbon generation history of Upper Paleozoic hydrocarbon source rocks in the study area. This paper starts with the hydrocarbon generation characteristics of the Upper Paleozoic, evaluates the coal, mudstone and carbonaceous mudstone of the Upper Paleozoic, and determines the hydrocarbon filling time by simulating the hydrocarbon generation history of the Upper Paleozoic source rock in Block X. The Ro of hydrocarbon source rocks reached 0.5% in the early Permian (about 265 Ma ago) and began to generate gas. In the early Triassic (about 250 Ma ago), the Ro reached 0.7% and began to generate a lot of gas; by the Middle Triassic (about 235 Ma ago), Ro reached 1.0%, entering the peak of gas generation.