摘要
哈拉阿拉特山地区位于准噶尔盆地西北缘前陆褶皱冲断带上,构造演化特征复杂。从构造地质理论出发,应用成盆动力学和盆山耦合的理论对该地区进行了构造解析研究,并利用平衡剖面技术对其进行了构造演化特征及演变史的恢复,同时,针对该区构造演化对油气运聚成藏的控制和影响因素亦进行了深入分析与探讨。在此基础上,获得了以下重要结论与认识:(1)哈拉阿拉特山地区构造演化与准噶尔盆地西北缘密切相关,大致经历了4个演化阶段:即碰撞挤压期(C—P)、弧后挤压期(P2—T)、伸展断陷期(J1—J12)和再生前陆期(J22—Q);(2)哈拉阿拉特山及周边地区的沥青及稠油显示,说明该地区发生过油气的运移聚集;(3)哈山地区油气源主要有本地近源与玛湖凹陷远源两种烃源供给系统,油气运聚成藏的关键时期为三叠纪和侏罗纪,油气成藏模式初步预测有3种,远源侧向砂体—不整合运聚早期成藏模式、近源垂向断层—砂体运聚早期成藏模式和近源混向阶梯状运聚晚期成藏模式;(4)推覆体下盘的背斜等构造圈闭区带是该区寻找油气藏的有利区域。
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-J2 1） and regenerated foreland basin（J2 2-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 ofoil 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.
出处
《西南石油大学学报（自然科学版）》
CAS
CSCD
北大核心
2013年第1期35-42,共8页
Journal of Southwest Petroleum University(Science & Technology Edition)
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
area of Hala＇alate mountains
basin-range coupling theory
tectonic evolution
balanced cross section technique
hydrocarbon accumulation
