石油学报 ›› 2016, Vol. 37 ›› Issue (S2): 39-55.DOI: 10.7623/syxb2016S2005

• 地质勘探 • 上一篇    下一篇

断坳叠置湖盆岩相古地理研究方法——以沧东凹陷为例

李勇1, 颜照坤1, 李洪香2, 刘子藏2, 官全胜2   

  1. 1. 成都理工大学油气藏地质及开发工程国家重点实验室 四川成都 610059;
    2. 中国石油大港油田公司勘探开发研究院 天津 300280
  • 收稿日期:2016-07-11 修回日期:2016-12-10 出版日期:2016-12-30 发布日期:2017-03-08
  • 通讯作者: 李勇,男,1963年12月生,1984年获武汉地质学院学士学位,1994年获成都理工学院博士学位,现为成都理工大学教授、博士生导师,主要从事沉积地质学方面研究。Email:liy@cdut.edu.cn
  • 作者简介:李勇,男,1963年12月生,1984年获武汉地质学院学士学位,1994年获成都理工学院博士学位,现为成都理工大学教授、博士生导师,主要从事沉积地质学方面研究。Email:liy@cdut.edu.cn

Paleogeography method of fault depression superposition lake basin: a case study of Cangdong sag

Li Yong1, Yan Zhaokun1, Li Hongxiang2, Liu Zicang2, Guan Quansheng2   

  1. 1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Sichuan Chengdu 610059;
    2. Research Institute of Exploration and Development, PetroChina Dagang Oilfield Company, Tianjin 300280, China
  • Received:2016-07-11 Revised:2016-12-10 Online:2016-12-30 Published:2017-03-08

摘要:

通过对沧东凹陷及其周边区域钻孔资料和地震资料的分析,获得对沧东凹陷孔店组残留地层的空间分布和现今构造特征的认识。结合65口井1 120 m岩心、340余口井测井资料、600余口井录井资料和32条地震测线等资料指示的沉积特征,初步判定孔店组沉积期沧东凹陷湖盆演化总体经历了4个阶段,分别为:坳陷初期(孔店组三段沉积时期)、坳陷期(孔店组二段沉积时期)、坳陷末期(孔店组一段下亚段沉积时期)和断陷期(孔店组一段上亚段沉积时期)。4个阶段的湖盆古地理演化过程为:孔店组三段冲积扇-冲积平原(或辫状河三角洲)-滨浅湖沉积体系→孔店组二段辫状河三角洲-深湖沉积体系→孔店组一段下亚段冲积扇-冲积平原-滨浅湖沉积体系→孔店组一段上亚段冲积扇-冲积平原-膏盐湖沉积体系。

关键词: 沧东凹陷, 孔店组, 岩相古地理, 断坳叠置湖盆, 原型盆地

Abstract:

By analyzing the drilling data and seismic data of Cangdong Sag and its surrounding area, the spatial distribution and current structural feature of residual strata in the Kongdian Formation, Cangdong Sag is obtained. Combined with the sedimentary characteristics indicated by 1 120 m core from 65 wells, logging information from over 340 wells, mud logging information from over 600 wells, 32 seismic lines and other data, it is preliminarily considered that the lake basin in Kongdian Formation, Cangdong Sag overall experienced 4 stages in the depositional stage, i.e., early depression period(sedimentary period of the 3rd Member of Kongdian Formation), depression period(sedimentary period of the 2rd Member of Kongdian Formation), later depression period(sedimentary period of the lower sub-member of the 1st Member of Kongdian Formation) and faulted period(sedimentary period of the upper sub-member of the 1 st Member of Kongdian Formation). The 4 stages of paleogeography evolution in the lake basin is as below:alluvial fan-alluvial plain(or braided river delta) of the 3 rd Member of Kongdian Formation-shore-shallow lake sedimentary system→braided river delta-deep lake sedimentary system of the 2nd Member of Kongdian Formation→alluvial fan-alluvial plain-shore-shallow lake sedimentary system of the lower sub-member of the 1st Member of Kongdian Formation→alluvial fan-alluvial plain-gypsic saline lake sedimentary system of the upper sub-member of the 1st Member of Kongdian Formation.

Key words: Cangdong sag, Kongdian Formation, lithofacies paleogeography, fault depression superposition lake basin, prototype basin

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