Abstract:

Turpan-Hami Basin consists of Hami (in the east part) and Turpan (in the west part) Depressions which occupy an area of about 4.86?10⁴km² withdeposits over 8700m in the greatest thickness. In Turpan Depression, Jurassic is primary, Permia n and Triassic secondary; but the Hami Depression is contrary to the Turpan Depression. The Qiktim and Sinjinkou Oilfields were discovered in early years, and a number of medium or large size oilfields such as Qiuling, Shanshan, Wenjisang and Yilahu Oilfields were also discovered in recent years in the region. This paper summarized the basic pool types and divided them into co-matured plentiful type (Shanshan, Qiuling and Wenjisang), semi-comatured unplentiful type (Yilahu), destroied-comature type (Sinjin-kou, Qiktim) and uncomatured poor type, under the basic division of pools of structural,stratigraphic-lithologic and complex types. Hydrocarbon accumulation was controlled by fossil uplifts, slopes, fault belts, denudation and pinch-out belts.