新疆石油地质

新疆石油地质 ›› 2003, Vol. 24 ›› Issue (1): 47-49+2.

• 油气勘探 • 上一篇    下一篇

阿拉善断块侏罗系油气成藏控制因素

杨福忠1, 贾艳鹏1, 胡社荣2   

  1. 1.中国石油 石油勘探开发科学研究院,北京100083;
    2.中国矿业大学(北京),北京100083;
  • 收稿日期:2002-04-16 修回日期:2002-07-01 出版日期:2003-02-01 发布日期:2020-11-26
  • 作者简介:杨福忠(1963-),男,山西高平人,硕士,高级工程师,石油地质。联系电话：010-62097800

The Control Factors on Hydrocarbon Accumulation of Jurassic in Alashan Fault Block

YANG Fu-zhong, JIA Yan-peng, HU She-rong   

  • Received:2002-04-16 Revised:2002-07-01 Online:2003-02-01 Published:2020-11-26
  • About author:YANG Fu-zhong (1963-), Male, Master, Petroleum Geology, Research Institute of Petroleum Exploration and Development, CNPC, Beijing 100083, China

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摘要： 在阿拉善断块,差异构造作用使巴音浩特盆地没有发育良好的烃源岩层;潮水盆地的烃源岩虽达到了成熟阶段,但同沉积断裂活动使盆地分割为多个小的次级洼陷,且很少发育良好烃源岩,因而难以形成有工业意义的中小油气田;雅布赖盆地虽发育有巨厚且良好的烃源岩层,但由于沉积中心迁移和构造剥蚀,致使优良烃源岩发育区段尚未成熟,同样不可能形成有工业意义的油气田。由于潮水和雅布赖盆地缺乏侏罗系以外的烃源岩层的发育,今后也难在该区找到有工业意义的油气田;研究还表明,控制含煤岩系油气藏形成的主要因素是：良好的构造叠合条件,成熟的、 有一定数量和质量的有效烃源岩层、发育多套完整的湖平面变化旋回准层序组。

关键词: 阿拉善, 侏罗纪, 油气藏形成, 煤系, 地层层序, 成熟度

Abstract: The differential structure process found in Alashan fault block results in no well-developed source rocks in Bayinhaote basin; the source rock in Chaoshui basin reaches mature stage, but seldom well-developed source rocks occur due to multiple small sub-sags formed by synsedimentary faulting activity. Hence, it is hard to shape commercial medium- and small-scaled oil and gas fields. In Yabulai basin, huge thick and good source beds are developed, but because of sedimentary center migration and structural denudation, which leads to nonmature condition in fine source rock segment, it is also unable to form commercial fields. Moreover, in Chaoshui and Yabulai basins, owing to their absence of developed source rocks beyond Jurassic, commercial fields won't be found in the future. The study results indicate that the major factors controlling scale and shape of Jurassic coal-bearing reservoirs are the suitable structural superimposing conditions, matured and a certain quantity or quality of effective source beds as well as multi-complete sets of cyclic quasi-sequence group with lake level variations.

Key words: coal-bearing measure, sequence stratigraphy, maturity, major control factor, Alashan, Jurassic

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