关键词: 哈拉阿拉特山地区, 盆山耦合理论, 构造演化, 平衡剖面技术, 油气成藏

Abstract: The area of Hala’alate mountains is located in the foreland thrust belt，north segment of the Junggar Basin，the tectonic evolution characteristics of which was complicated. Using Basin dynamics theory，basin-range coupling idea and balanced cross section technique，this paper shows the whole structural interpretation and resumes the tectonic evolution of the area of Hala’alate mountains. We analyze and discuss about the factors of oil and gas migration and accumulation which are controlled and influenced by tectonic evolution of the area. On this basis，we conclude that：（1）tectonic evolution of the area of
Hala’alate mountains is closely related to the northwest Junggar Basin，and the entire development can be divided into 4 stages: impact extrusion period（C—P），back-arc extrusion period（P2—T），extended fault period（J1—J12 ）and regenerated foreland basin（J22—Q）；（2）bitumen and heavy oil existence in Hala’alate mountains and the surrounding areas illustrate that oil and gas migration and accumulation had been occurred in this area；（3）there are two kinds of source supply system which are local source and Mahu sag distal source in the area of Hala’alate mountains. The formation of a critical period of oil and gas were the Triassic and Jurassic. The reservoir formation models may be briefly summarized as follows：earlier formation model of far source and side transportation through sand-unconformity，earlier formation model of near source and vertical transportation through sand-fault，and later formation model of near source and ladder transportation；（4）the anticlinal structures in the lower plate of the Daerbute fault should be favorable direction for oil and gas exploration.

Key words: area of Hala’alate mountains, basin-range coupling theory, tectonic evolution, balanced cross section technique, hydrocarbon accumulation