西南石油大学学报(自然科学版) ›› 2016, Vol. 38 ›› Issue (5): 81-89.DOI: 10.11885/j.issn.16745086.2015.10.16.02

• 地质勘探 • 上一篇    下一篇

玛湖凹陷三叠纪古地貌对沉积的分级控制作用

任本兵, 瞿建华, 王泽胜, 钱海涛, 唐勇   

  1. 中国石油新疆油田分公司勘探开发研究院, 新疆 克拉玛依 834000
  • 收稿日期:2015-10-16 出版日期:2016-10-01 发布日期:2016-10-01
  • 通讯作者: 任本兵,E-mail:xjrenbb@petrochina.com.cn
  • 作者简介:任本兵,1985年生,男,汉族,四川宣汉人,工程师,硕士,主要从事地震地质综合研究工作。E-mail:xjrenbb@petrochina.com.cn;瞿建华,1981年生,男,汉族,湖北洪湖人,高级工程师,硕士,主要从事石油地质勘探研究工作。E-mail:qujianh@petrochina.com.cn;王泽胜,1981年生,男,汉族,湖北枣阳人,工程师,硕士,主要从事地震地质综合研究工作。E-mail:wzsh6@petrochina.com.cn;钱海涛,1986年生,男,汉族,陕西西安人,工程师,硕士,主要从事油气勘探综合研究工作。E-mail:fcqht@petrochina.com.cn;唐勇,1966年生,男,汉族,重庆合川人,教授级高级工程师,博士,主要从事石油地质勘探研究工作。E-mail:tyong@petrochina.com.cn
  • 基金资助:
    国家重点基础研究发展计划(2011CB201101);国家科技重大专项(2011ZX05003005)。

Hierarchical Control Function of the Paleogeomorphology in Triassic Period to Sedimentary in Mahu Sag

REN Benbing, QU Jianhua, WANG Zesheng, QIAN Haitao, TANG Yong   

  1. Research Institute of Exploration and Development, Xinjiang Oilfield Company, PetroChina, Karamay, Xinjiang 834000, China
  • Received:2015-10-16 Online:2016-10-01 Published:2016-10-01

摘要: 勘探实践证实,玛湖凹陷三叠系百口泉组扇三角洲沉积具有相带控藏控产的特点。针对常规相带刻画技术难以实现对沉积微相的刻画以满足勘探需求的技术难题,利用古地貌恢复,结合钻探资料,开展了古地貌对百口泉组扇三角洲沉积分级控制作用的研究,以实现对扇三角洲前缘相朵叶体的精细刻画。研究表明,百口泉组扇三角洲沉积受古地貌分级控制:(1)山口、沟槽、古凸控制着扇体主槽走向,从而控制着平原相及扇间泥岩带,平台区控制着前缘相带展布,主流线向坡降较大的方向偏移,从而控制着扇体相带的对称性,多级坡折则控制着高低位湖岸线的分布;(2)平台区次级沟谷及坡折等二级古地貌控制着次级主流线的走向,从而控制着前缘相朵叶体的分布。

关键词: 玛湖凹陷, 百口泉组, 扇三角洲, 古地貌, 分级控制

Abstract: Exploration practice confirmed that Fan delta deposit has the characteristics of facies control of reservoir and production in the Triassic Baikouquan Formation in Mahu Sag. For the technical problem that the conventional sedimentary facies division technology is difficult to achieve the division of sedimentary microfacies in order to satisfy the demand of exploration. With the paleogeomorphology restoration technology and drilling data, we studied the hierarchical control function of the paleogeomorphology to the Fan Delta sedimentary in Baikouquan Formation, and achieved meticulous depiction of the front facies of Fan Delta. Studies indicate that the Fan Delta sedimentary in Baikouquan Formation hierarchically controlled by the paleogeomorphology in Triassic Period. Mountain pass,grooves,convex controls the main channel of Fan Delta,thus controls the plain facies of Fan Delta and the Mudstone between Fan Delta. The Platform Area controls the front facies of Fan Delta. The mainstream line towards the direction of the larger gradient, thus controls the symmetry of Fan Delta. Multistage slope breaks control the location of the hi-lo shorelines. In the platform area, secondary paleogeomorphology, including secondary groove and slope break, controls the subprime mainstream line direction, thus controls distribution of Lobes body in the front facies of Fan Delta.

Key words: Mahu Sag, Baikouquan Formation, Fan delta, paleogeomorphology, hierarchical control

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