Hydrodynamic Evolution and Hydrocarbon Accumulation in the Dabashan Foreland Thrust Belt, China

摘要: : There are two plays in the Dabashan foreland tectonic belt: upper and lower plays. The play experienced one sedimentary hydrodynamic stage, burial stages, stages infiltration from Sinian to Cenozoic, while had stage Permian Cenozoic. Extensive flows of both water, including hydrocarbons, deep mantle fluid occurred Chengkou faults during collision orogeny Middle-Late Triassic Indosinian orogeny, flow was complicated intracontinental Jurassic. In addition these movements, movement meteoric water took place faults, whereas covering-strata decollement belt, extensive (including hydrocarbons) mainly Zhenba Pingba faults. During rapid uplift exhumation Cretaceous characterized by gravity-induced caused altitude difference, processes relatively less significant. Sedimentary more significant hydrocarbon migration accumulation but its influence is slight on play. On hand, hydrodynamics Jurassic adjusted, reformed or oven destroyed oil reservoirs play; other it drove large amounts hydrocarbons migrate laterally vertically favorable for accumulation. Infiltration adjusted