地学前缘 ›› 2019, Vol. 26 ›› Issue (1): 248-261.DOI: 10.13745/j.esf.sf.2018.12.8

• 深层油气成藏 • 上一篇    下一篇

玛湖凹陷玛中—玛东地区三叠系百口泉组断裂特征及控藏作用分析

周路，朱江坤，宋永，陆鹏，瞿建华，尤新才，吴勇，任本兵，赵明坤，肖豪   

  1. 1. 西南石油大学 油气藏地质及开发工程国家重点实验室, 四川 成都 610500
    2. 西南石油大学 地球科学与技术学院, 四川 成都 610500
    3. 中国石油新疆油田公司 勘探开发研究院, 新疆 克拉玛依 834000
    4. 中国石油集团测井有限公司 西南分公司, 重庆 400021
    5. 天然气地质四川省重点实验室, 四川 成都 610500
  • 收稿日期:2018-10-09 修回日期:2018-12-19 出版日期:2019-01-30 发布日期:2019-01-30
  • 作者简介:周路(1962—),男,博士,教授,博士生导师,主要从事地震资料解释、地震岩性与储层预测等方面的科研与教学工作。E-mail:zhoulu9@126.com
  • 基金资助:
    国家油气专项(2017ZX05008-004-008)；国家自然科学基金项目(41430316)

Analysis of fault characteristics and reservoir control in Triassic Baikouquan Formation in central and eastern Mahu depression

ZHOU Lu,ZHU Jiangkun,SONG Yong,LU Peng,QU Jianhua,YOU Xincai,WU Yong,REN Benbing,ZHAO Mingkun,XIAO Hao   

  1. 1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China
    2. School of Geosciences and Technology, Southwest Petroleum University, Chengdu 610500, China
    3. Petroleum Exploration and Development Institute, Xinjiang Oilfield Company, PetroChina, Karamary 834000, China
    4. Southwest Branch, CNPC Logging Company Limited, Chongqing 400021, China
    5. Sichuan Province Key Laboratory of Natural Gas Geology, Chengdu 610500, China
  • Received:2018-10-09 Revised:2018-12-19 Online:2019-01-30 Published:2019-01-30
  • Supported by:
     

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摘要： 近年来准噶尔盆地玛湖凹陷三叠系百口泉组发现了十亿吨级砾岩大油田，目前在玛湖凹陷中部和东部地区也获得了可喜的勘探成果。利用新采集三维地震及周边多块区域三维地震资料组成的连片三维地震数据体，对玛纳斯湖以东的玛中—玛东地区百口泉组开展了连片三维地震精细构造解释，发现该地区中、深层可划分为4个主要的构造层，百口泉组断裂十分发育，具有多套断裂系统，断裂平面分布规律性强，且断裂类型多样。断裂控制了深、浅层构造的发育与分布，且断裂与油气藏的形成关系密切。研究区发育五种类型断裂， 其中在海西期强烈挤压应力作用下形成，并在印支期持续发育的逆冲深大断裂控制了玛湖凹陷区主要凸起和鼻隆等构造的形成与发育，同时该断裂也是油气纵向源外跨层运移至百口泉组的重要输送通道，各探井日产油量与距该断裂的距离呈现明显负相关关系，距离该断裂近的圈闭获高产可能性大；其次沿EW向呈雁列式分布的走滑断裂发育，平面延伸距离长，具有高部位封堵油气作用。断裂分布与储层物性发育区具有良好对应关系。

 

关键词: 准噶尔盆地, 玛湖凹陷, 百口泉组, 断裂, 控藏作用

Abstract: In recent years, great exploratory achievement has been made by the discovery of a billion ton scale conglomerate oil field in Triassic Baikouquan Formation in the Mahu depression, Junggar Basin. From 3D fine structural interpretation of the Baikouquan Formation (located to the east of the Manas Lake) based on new 3D seismic data surrounding the Mahu depression, we found that the middle and deep sections of the area can be divided into four main structural layers. The Baikouquan Formation possesses well developed multiple fault systems which show strong regularity in horizontal fault distribution for various fault types. Faults not only control the development and distribution of deep and shallow structures, but also are closely associated with oil and gas reservoirs. Overall, five types of fault developed in the study area, where the thrust deep fault, formed under the strong extrusion stress of the Hercynian period and developed in the Indosinian period, controls the formation and development of the main bulge and nose structures in the Mahu depression. At the same time, these faults are important transport channels for oil and gas migration across formation from source to the Baikouquan Formation. Daily oil production, therefore, significantly inversely correlates with the distance to the thrust deep fault; traps near the fault have a higher probability achieving high production. Moreover, en echelon strike-slip fault developed along the EW direction, extending long distance horizontally and plugging oil and gas channels from above. Finally, The fault distribution correlates well with the distribution of reservoir developing areas.

Key words: Junggar Basin, Mahu depression, Baikouquan Formation, fault, reservoir control

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