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?10

4

km

2

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.