Abstract:

Turpan-Hami Basin contains two types of source rocks and four petroleum systems suchas coal measure-noncoal formation combined type, noncoal formation type and Toksun,Taibei, Hami, Nanhu petroleum systems. Within the first type, oil traps that were mainlyformed in Late Cretaceous matched well with the peak period of hydrocarbon generation ofPermian-Triassic source rocks, thus forming Toksun petroleum system; the oil traps ofTaibei system were formed in Middle-Late Jurassic and matched well with the peak period ofhydrocarbon generatioll of Early-Middle Jurassic coal measures and that of Permian-Triassicsource rocks, thus forming Taibei petroleum system; Hami oil traps were formed in LateJurassic,matched with the peak period of Triassic lacustrine mudstone hydrocarbon generation, and formed Hami petroleum system.As for the noncoal formation system, since itscaprocks were formed so late and underwent three serious damages,large amounts of oil andgas were lost,it is not favourable to form large oil and gas pools.