油气地质

柴达木盆地北缘潜西地区路乐河组末端扇沉积体系分析

  • 雷涛 ,
  • 周文 ,
  • 杨艺 ,
  • 邓虎成 ,
  • 张光辉 ,
  • 赵安坤
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  • 1.成都理工大学“油气藏地质及开发工程”国家重点实验室; 2.成都理工大学沉积地质研究院; 3. 广西电力工业勘察设计研究院; 4.中国石油青海油田分公司勘探开发研究院
孟万斌,1968 年生,男,副教授,博士,专业方向为储层地质学。地址:(610059)四川省成都理工大学“油气藏地质及开发工程” 国家重点实验室。电话:(028)84076417。E-mail:mwb@cdut.edu.cn

网络出版日期: 2010-12-15

基金资助

国家重大专项(编号:2008ZX05002-004-002)资助

Terminal fan sedimentary system of Lulehe Formation in Qianxi area in northern margin of Qaidam Basin

  • LEI Tao ,
  • ZHOU Wen ,
  • YANG Yi ,
  • DENG Hucheng ,
  • ZHANG Guanghui ,
  • ZHAO Ankun
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  • (1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu 610059,China; 2. Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059, China; 3. Guangxi Electric Power Industry Investigation and Design Research Institute, Nanning 530023, China; 4. Research Institute of Petroleum Exploration & Development, Qinghai Oilfield Company, PetroChina, Dunhuang 735100,China

Online published: 2010-12-15

摘要

柴达木盆地新生代时期气候较干燥,主要沉积棕色、浅灰色陆相碎屑岩。通过岩心观察,对路乐河组岩性、结构构造特征、暴露标志进行了分析,并结合测井曲线分析认为,本区路乐河组主要为一套发育于干旱—半干旱环境的末端扇沉积体系,可进一步划分为主流带、分流带和远端盆地带3 个亚相,其中分流带亚相又可划分为分流河道沉积、泛滥平原沉积、越岸沉积和漫流沉积等4 个微相。文中分析了各亚相平面展布特征,建立了沉积相模式。通过分析各亚相砂体的特征及其与储层发育的关系,认为分流带亚相是最有利的储层发育相带。

本文引用格式

雷涛 , 周文 , 杨艺 , 邓虎成 , 张光辉 , 赵安坤 . 柴达木盆地北缘潜西地区路乐河组末端扇沉积体系分析[J]. 岩性油气藏, 2010 , 22(4) : 37 -42 . DOI: 10.3969/j.issn.1673-8926.2010.04.007

Abstract

The climate of the Qaidam Basin was arid to semiarid at the Cenozoic, and the strata deposits mainly are terrigenous clastics. Based on the core observation, the lithology, rock texture, sedimentary structure and the exposure evidence of Lulehe Formation are analyzed. Combined with well log analyses, it is believed that the sedimentary system of Lulehe Formation is terminal fan which formed in arid to semiarid regions. The model includes a tripartite zonation of terminal fan into feeder zone, distributary zone and basinal zone. The distributary zone mainly consists of distributary channel deposit, flood plain deposit, overbank deposit and sheet flood deposit. Feeder and distributary zone are the main deposition in Qianxi area. The subfacies distribution is analyzed and the sedimentary facies model is established. The relationship between subfacies and reservoir development is discussed and the distributary zone is the most favorable subfacies for reservoir development.

参考文献

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