天然气地质学

歧口凹陷新生代伸展断裂展布及演化特征

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  • 中国石油大港油田分公司勘探开发研究院,天津 300280
王辉(1983-),男,黑龙江克山人,助理工程师,主要从事地震解释及石油构造地质相关研究.E-mail:dg_wanghui2@petrochina.com.cn.

收稿日期: 2011-05-10

  修回日期: 2011-09-15

  网络出版日期: 2011-12-10

基金资助

中国石油天然气股份公司重大专项(编号:2008E-0601)资助.

Expanding Fracture Distribution of Qikou Sag in Cenozoic and Its Evolution

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  • Research Institute of Exploration and Development,Dagang Oilfield Company,PetroChina,Tianjin 300280,China

Received date: 2011-05-10

  Revised date: 2011-09-15

  Online published: 2011-12-10

摘要

依托最新采集的5 280km2二次三维地震数据解释成果,对歧口凹陷的伸展断裂系开展系统分析\.研究认为歧口凹陷内一级、二级主要伸展断裂滚动演化特征在一定程度上是整个盆地断裂演化特征的缩影,故重点分析了沧东断裂、滨海断裂等的演化特征。歧口凹陷新生代主要伸展断裂的活动表现出分段性、迁移性、旋回性和长期性四大特点。横向上具有由SW向向NE向滚动演化的特征,体现了断裂活动的分段性和迁移性特点;在纵向上断裂的活动可分为4幕,即沙三中期、沙一中期、东营末期及明化镇末期,沙一期、东营期是断裂主要活动期,体现了断裂活动的旋回性和长期性特点。

本文引用格式

王辉, 卢异, 张志攀, 陈宪保 . 歧口凹陷新生代伸展断裂展布及演化特征[J]. 天然气地球科学, 2011 , 22(6) : 1009 -1014 . DOI: 10.11764/j.issn.1672-1926.2011.06.1009

Abstract

We use the secondary interpretation result of new collecting 5 280km2 3D seismic data to discuss the extension fracture system in the Qikou sag.We think that the first and second order main stretch fracture with rolling evolution characteristics in the Qikou sag is to some extent the typical aspect of the whole basin fault evolution.Thus,we emphatically discuss the evolution of the Cangdong and Binhai faults.The main extensive fault activity in the Qikou sag is representative of the stepwise,migratory aptitude,cyclicity & long term behavior in Cenozoic.The fault activity rolled horizontally from SW to NE direction,reflecting the stepwise and migratory aptitude.The fault activities can be divided vertically into four phases,including mid-Es3 Epoch,mid-Es1 Epoch,end of Ed Epoch,and end of Nm Epoch.Mid-Es1 and Ed Epochs are the main active time of the faults,suggesting the cyclicity and long term behavior of the fault activities.

 

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