关键词: 吐鲁番—哈密盆地, 含油气盆地, 侏罗系, 有机质演化, 油气资源评价

Abstract:

The Jurassic was the prime period in the development of Turpan-Hami Cenozoic continental Basin. The Early and Middle Jurassic was lake transgressive sedimentary stage and source rocks developed well; the late Middle Jurassic and Late Jurassic was lake regressive sedimentary stage in which reservoir and cap rocks developed. Jurassic depocenters and subsiding centers were in North, Toksun-Shanshan and Wubu Sags. The first one is the main oil-generating sag, organic matter in Lower Jurassic source rocks of which began to generate oil in Late Jurassic and reached oil-generating peak in the Eogene, whereas that of the last two sags still in lower matured or immatured stages. The structures within the basin, including Kokyar anticline belt in the North Sag, the west Yanmu-Huoyanshan anticline be1t of Hu oyanshan-Sandaoling uplift formed primarily in late Yanshanian-Himalayan Epoches, matched well with the oil generating phase of Lower Jurassic source rocks in time and space, and were favourable for hydrocarbon migration and accumulation. So the Structures mentioned above are the most prospective areas for Mesozoic hydrocarbon. Qiktai and Shengjinkou anticline oil pools situated in Huoyanshan anticline beltare the examples of this kind, followed by Toksun-south Shanshan and Wubu Sags. Yanshan and Dadun structures in west Yanmu anticline are favor to trap hydrocarbon generated from both sags in the north and south.