收稿日期: 2010-02-01
修回日期: 2010-04-21
网络出版日期: 2010-12-10
基金资助
国家“十五”科技攻关项目(编号：2003BA613A-02)资助
Discovery of Braided River Delta in the Lower Member of Guantao Formation in Zhanhua Sag and Exploration Significance
Received date: 2010-02-01
Revised date: 2010-04-21
Online published: 2010-12-10
王蛟 . 沾化凹陷馆陶组下段辫状河三角洲的发现及油气勘探意义[J]. 天然气地球科学, 2010 , 21(6) : 974 -979 . DOI: 10.11764/j.issn.1672-1926.2010.06.974
It is widely accepted that the sedimentary facies in the Neogene Guantao Formation in Zhanhua sag of Jiyang depression is river.But this single viewpoint has evidently constrained the exploration of oil and gas.By means of recent practice of exploration and sedimentology research,we found out that there was not only development of rudaceous braided river but also of braided river delta-infilling shallow lake in the lower segment of Guantao Formation.The braided river delta was composed of braided plain,braided delta-front and braided prodelta.The sand in the subaqueous distributary channel was a main body.The river mouth bar and infralittoral bar was less developed,and the thickness of pro\|delta facies belt was thin.This discovery would bring forth a very expansive exploration foreground.
Key words： Zhanhua sag; Guantao Formation; Braided river delta; Shallow lakes; Exploration.
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