新疆石油地质

新疆石油地质 ›› 2005, Vol. 26 ›› Issue (4): 397-400.

• 油气勘探 • 上一篇    下一篇

吐哈盆地台北与台南凹陷三叠系成藏差异性

杨珍祥1, 康永尚2, 焦立新1, 何志平3, 杨松岭4   

  1. 1.中国石油 吐哈油田分公司,新疆 哈密839009;
    2.中国石油大学 资源与信息学院,北京 102249;
    3.中国矿业大学资源系,北京 100083;
    4.中国石油 物探局地研中心,河北涿州072751
  • 收稿日期:2004-10-27 出版日期:2005-08-01 发布日期:2020-11-23
  • 作者简介:杨珍祥(1966-),男,甘肃秦安人,高级工程师,油气勘探,(TeD)0995--8371571(E-mai)yzxktc@Tuha.Net.
  • 基金资助:
    国家973项目,吐哈盆地三叠系油藏地质特征及成藏机理研究（G19990433）资助

Differential Hydrocarbon Accumulation of Triassic in Taibei and Tainan Sags, Tuha Basin

YANG Zhen-xiang1, KANG Yong-shang2, JIAO Li-xin1, HE Zhi-ping3, YANG Song-ling4   

  1. 1. Tuha Oilfield Company, PetroChina, Hami, Xinjiang 838202, China;
    2. Institute of Earth Resources and Information, China University of Petroleum, Beijing 102249, China;
    3. Department of Resources, China University of Mining & Technology, Beijing 100083, China;
    4. Geological Research Center, Bureau of Geophysical Prospecting (BGP), Zhuozhou, Hebei 072751, China
  • Received:2004-10-27 Online:2005-08-01 Published:2020-11-23

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摘要： 分析了台北凹陷鄯深构造和台南凹陷鲁克沁构造带之间三叠系储集层特征及其控制因素以及成藏机理的差异性,认为造成这种差异的最根本原因是它们在晚印支运动期到晚燕山运动期乃至晚喜马拉雅运动期所处的构造环境不同。尽管台北凹陷的古隆起构造带(如鄯善弧形带)紧邻烃源岩,但由于受成岩作用和构造变化两方面的影响,存在储集物性较差、圈闭形成相对滞后于烃源岩生排烃高峰期的风险;而台南凹陷在侏罗纪早期埋藏较浅,成岩压实作用较弱，具有较好的储集物性,同时从晚印支运动期开始，台南凹陷东南方向构造开始稳定持续抬升，为油气运移的长期指向区。因此,台南凹陷相对于台北凹陷具有更好的成藏条件,吐哈盆地三叠系的勘探应该关注构造相对稳定，并有油气供给的盆地南带。

关键词: 吐哈盆地, 台北凹陷, 台南凹陷, 三叠系, 勘探

Abstract: The reservoir characteristics of Triassic between Shanshen structure belt in Taibei sag and Lukeqin structural belt in Tainan sag as well as their controlling factors are analyzed. The differential mechanism in hydrocarbon accumulation is due to their different structural settings in late Indosinian movement, late Y anshan movement till Late Himalayan movement. The paleo-uplift structural belt (i.e. Shanshan arcuate zone) in Taibei sag is adjacent to the source rocks, but for diagenesis and tectonic variation, the differential reservoir quality and trap shape timing behind hydrocarbon generation and expulsion periods occur; while the relatively shallow deposits of Early Jurassic in Tainan sag have better reservoir quality for its weak diagenesis and compaction. A lso, since Late Indosinian movement, the structures in the southeastern Tainan sag commence stable and continuous tilting, thus being the long- term directional domain. Therefore, the petroleum exploration of Triassic in Tuha basin should pay more attention to the southern area with relatively stable structures,hydrocarbon supply and better reservoir quality.

Key words: Tuha basin, Taibei sag, Tainan sag, Triassic, petroleum exploration

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