柴达木盆地北缘侏罗系区域生烃演化概况

Based on the simulation analysis of tectonic-Burial history and the hydrocarbon generation evolution history indicate that the Jurassic source rock has been experienced two hydrocarbon generation processes on the control of structure evolution in the northern margin of Qaidam basin, mainly occurred in Yanshanian and Himalayan period respectively. In the end of Yanshanian period, the organic matter of Lenghu structure belt, Kunteyi depression and Yibei depression center had enter into the hydrocarbon generation evolution phase but the maturity evolution range and the hydrocarbon generation ration was small. In Himalayan period, the Jurassic source rock was buried deeply continuously and the maturity substantial increase, the source rock had been reached high-over matured stage in most area initiated hydrocarbon generation effect widely, the great hydrocarbon amount provided plenty of material foundation for hydrocarbon reservoir forming.