deep buried karst caves, recognition and distribution, filling features, preservation mechanism, Tahe area,"/> 四川盆地元坝中部断褶带须四段高分辨率层序地层

岩性油气藏 ›› 2014, Vol. 26 ›› Issue (4): 97–102.doi: 10.3969/j.issn.1673-8926.2014.04.014

• 油气地质 • 上一篇    下一篇

四川盆地元坝中部断褶带须四段高分辨率层序地层

王明飞1,屈大鹏1,肖伟1,凌涛2,陈灵君1   

  1. 1.中国石化勘探南方分公司 勘探研究院,成都 610041; 2.中海石油(中国)有限公司 湛江分公司 研究院,广东 湛江 524057
  • 出版日期:2014-08-15 发布日期:2014-08-15
  • 作者简介:王明飞(1986-),男,硕士,主要从事石油地质方面的研究工作。 地址:(610041)四川省成都市高新区吉泰路 688 号中国石化西南科研办公基地主楼 903 室。 电话:(028)85164839。 E-mail:mingfei.w@foxmail.com。

High resolution sequence stratigraphy of the fourth member of Xujiahe Formation in central fault-fold belt of Yuanba area, Sichuan Basin

WANG Mingfei1, QU Dapeng1, X IAO Wei1, L ING Tao2, CHEN Lingjun1
  

  1. 1. Research Institute of Exploration, Sinopec Exploration Southern Company, Chengdu 610041, China; 2. Research Institute of Zhanjiang Company, CNOOC Limited, Zhanjiang 524057, Guangdong, China
  • Online:2014-08-15 Published:2014-08-15

摘要:

依据地层发育特征,对元坝中部断褶带须四段进行高分辨率层序地层划分。 首先,根据现代辫状河与辫状河三角洲沉积特征,厘清辫状河与辫状河三角洲沉积体系发育部位,依据钻井和测井资料,确定须四段发育辫状河和辫状河三角洲相;然后,根据高分辨率层序地层学原理,识别出具有层序地层意义的 2 种河道类型,即低可容纳空间侧向叠置河道和高可容纳空间垂向叠置河道,进而判断基准面旋回转换位置,明确须四段可划分出 2 个四级旋回及 3 个亚段:上砂段、腰带段及下砂段;最后,井-震结合进行须四段层序地层综合解释,建立区域等时层序地层格架,为进一步分析等时层序格架内沉积相展布特征奠定了基础。

关键词: 深埋岩溶洞穴, 识别与分布, 充填特征, 保存机制, 塔河地区

Abstract:

On the basis of formation development characteristics, this paper studied the high-resolution sequence stratigraphy division of the fourth member of Xujiahe Formation in central fault-fold belt of Yuanba area. Firstly, based on the sedimentary characteristics of modern braided river and braided river delta, we clarified the braided river sedimentary system and braided river delta sedimentary system. Through the drilling and logging data, we defined that the study area developed braided river facies and braided river delta facies. And then, according to the principle of high resolution sequence stratigraphy, we identified two types of braided channel which have sequence stratigraphy significance, including high accommodation vertical superimposed braided channel and low accommodation lateral superposed braided channel, which can be used to judge the transformation position of base level cycle for single well high resolution sequence division. It was considered that the fourth member of Xujiahe Formation can be divided into two fourth-order cycles and three sub-members. Finally, combined with the seismic sequence interpretation of the fourth member of Xujiahe Formation, we established regional sequence stratigraphic framework, which provides foundation for the further study on sedimentary facies distribution in sequence stratigraphic framework.

Key words: line-height: 107%, deep buried karst cavesfont-size: 10.5pt;">deep buried karst cavesline-height: 107%, ')">font-size: 10pt;">, line-height: 107%, recognition and distributionfont-size: 10.5pt;">recognition and distributionline-height: 107%, ')">font-size: 10pt;">, line-height: 107%, filling featuresfont-size: 10.5pt;">filling featuresline-height: 107%, ')">font-size: 10pt;">, line-height: 107%, preservation mechanismfont-size: 10.5pt;">preservation mechanismline-height: 107%, ')">font-size: 10pt;">, line-height: 107%, Tahe area')">font-size: 10.5pt;">Tahe area

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