石油与天然气地质 ›› 2004, Vol. 25 ›› Issue (5): 513-518,538.doi: 10.11743/ogg20040507

• 油气地质 • 上一篇    下一篇

渤海湾盆地沾化凹陷下第三系高精度层序地层学研究

魏魁生1, 史淑玲1, 厉大亮1, 罗彦1, 卢松涛1, 邱以钢2, 宗国洪2, 郑和荣2, 郝运轻2, 宋国齐2   

  1. 1. 中国地质大学,北京 100083;
    2. 中国石化胜利油田分公司,山东东营 257015
  • 收稿日期:2004-08-23 出版日期:2004-10-25 发布日期:2012-01-16
  • 基金资助:

    国家"九五"重大攻关项目:沾化凹陷第三系沉积、构造及含油性研究

High accuracy sequence stratigraphy of Lower Tertiary in Zhanhua depression, Bohai bay basin

Wei Kuisheng1, Shi Shuling1, Li Daliang1, Luo Yan1, Lu Songtao1, Qiu Yigang2, Zong Guohong2, Zheng Herong2, Hao Yunqing2, Song Guoqi2   

  1. 1. China University of Geosciences, Beijing;
    2. Shengli Oilfield Company Ltd., SINOPEC, Dongying, Shandong
  • Received:2004-08-23 Online:2004-10-25 Published:2012-01-16

摘要:

以钻井、三维地震等资料为基础,运用高精度层序地层学理论及方法,建立了沾化凹陷层序地层格架,划分出1个一级层序、4个二级层序、17个三级层序、51个体系域、70个准层序组和109个准层序。根据地震反射终止结构特征、准层序组叠加方式的转换和岩性剖面,识别出层序边界、首次洪泛面和最大洪泛面等关键界面。根据准层序组的叠加型式及地震相区分沉积体系类型,恢复了沉积体系。在层序地层格架内,低位体系域沉积体系类型丰富,以三阶坡折控制的冲积扇-扇三角洲(三角洲)-低位楔-低位扇为特征;水进体系域和高位体系域的沉积体系具有继承性。每个体系域的沉积体系组合具有成因上的连续性。强烈断陷期发育的沉积体系与不整合面、断层面相配置的地区是油气勘探的有利区带。

关键词: 沾化凹陷, 高精度, 层序地层格架, 低位体系域, 三阶坡折, 有利区带

Abstract:

Based on 3-D seismic,drilling data and other data,and by using the theories and methods of high-accuracy sequence stratigraphy,sequence stratigraphic framework has been established in Zhanhua depression,which consists of 1 first-order sequence,4 second-order sequences,17 third-order sequences,51 system tracts,70 parasequence sets and 109 parasequences.Critical surfaces,such as sequence boundary,initial flooding surface and maximum flooding surface,have been defined on seismic profiles,according to the termination patterns of reflection configuration,transformation of stacking patterns of parasequence sets and lithologic profile.Sedimentary systems are categorized and restored based on the stacking pattern of parasequence sets and seismic phases.In the sequence stratigraphic framework,lowstand system tract (LST) consists of many types of sedimentary systems,which are characterized by alluvial fan-fan delta (delta)-lowstand wedge-lowstand fan under control of the third-order slope break.The sedimentary systems in transgression system tract and high stand system tract have inheritance.Combinations of sedimentary systems in each system tract have genetic continuity.Areas where sedimentary systems developed during strong fault subsidence and allocated with unconformities and fault planes are the favorable exploration play.

Key words: Zhanhua depression, high-accuracy, sequence stratigraphic framework, lowstand systems tract, third-order slope break, favorable play

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