关键词: 西藏, (伦坡拉盆地), 盆地演化, 油气生成, 油气藏形成, 运动学, 动力学系统, 事件

Abstract: There might be three periods of oil generation in Lunpola basin's hydrocarbon source rocks(Tibet), accordingly forming reservoirs by three-period flling-up process. The paths for hydrocarbon migration were dominated by faulting, unconformity, pores or fissure network system, where the driving forces for oil/gas migration would be abnormal high pressure(Niubao formation depositional period) and hydrostatic pressure(Dinqing lake formation depositional period). The reservoir-formned dynamic system could be divided into lower self-source enclosed type,middle allo- source to self-source semi-full enclosed type and upper allo-source semi-open enclosed one. The study showed that in Pagela flexure zone,south slope of Pacuo sag,south slope of Jiangriacuo and Luomadiku zone,the exploration should focus on petroleum reservoir with self source enclosed dynamic system for forming reservoirs, while in northern Hongxingliang-Di 'e2ong and Luomadiku areas,on the reservoir with middle allo-source -self-source semi-full enclosed dynamic system for forming reservoirs, and pay attention to searching for the reservoirs with upper allo-source semi-open enclosed dynamic system.

Key words: Tibet, (Lunpola basin), Basin evolution, Hydrocarbon generation, Oil and gas reservoir formation, Kinematics, Dynamics, System, Event