技术方法

鄂尔多斯盆地长7 段浊积岩沉积演化模式及石油地质意义

  • 高长海 ,
  • 查明
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  • 1.西安石油大学油气资源学院; 2.西北大学大陆动力学国家重点实验室; 3.中国石油长庆油田分公司; 4.中国石化胜利油田有限公司地质科学研究院
庞军刚,1978 年生,男,讲师,西北大学在读博士研究生,主要从事沉积学及层序地层学的教学及科研工作。地址:(710065)陕西 省西安市电子二路东段18 号油气资源学院。电话:(029)88382678。E-mail:pangjg2006@126.com

网络出版日期: 2009-12-16

基金资助

国家重点基金研究发展计划项目(编号:2003CB214602)与长江学者和创新团队发展计划(编号:IRT0559)联合资助

Sedimentary evolution model and petroleum significance of Chang-7 member turbidite,Ordos Basin

  • GAO Changhai ,
  • ZHA Ming
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  • 1. School of Petroleum Resources, Xi’an Petroleum University, Xi’an 710065, China; 2. Geological Department, State Key Laboratory of Continental Dynamics, Northwest University, Xi’an 710069, China; 3. Changqing Oilfield Branch Company, PetroChina,Xi’an 7100021, China; 4. Geological Research Institute of Shengli Oilfield Co.Ltd., Sinopec, Dongying 257015, China

Online published: 2009-12-16

摘要

鄂尔多斯盆地长7 深湖区广泛分布浊积岩,在岩性、沉积构造、沉积序列及电测曲线等方面均具有明显的识别特征。在古地理演化过程中,长73 期湖盆达到鼎盛,深湖区分布范围最大,碎屑物供应有限,浊积岩零星分布。从长73—长72—长71,深湖线向湖内收缩,浊积砂体逐渐发育,文章建立了该区浊积岩沉积演化模式。深湖区具备良好的石油成藏地质条件,浊积砂体可以作为深湖区好的储层,研究区西南部浊积岩发育区已发现多口工业油流井,可作为下一步的重点勘探区域。

本文引用格式

高长海 , 查明 . 鄂尔多斯盆地长7 段浊积岩沉积演化模式及石油地质意义[J]. 岩性油气藏, 2009 , 21(4) : 73 -77 . DOI: 10.3969/j.issn.1673-8926.2009.04.014

Abstract

The extensive extent turbidite can be identified by such apparent signatures as lithology, sedimentary structure, sedimentary sequence and well logs ofChang-7 member deep lake, Ordos Basin. During the paleo-geographic evolution of Chang-7 member, lake basin and deep lake are both at their maximum extent during Chang-73 stage, and turbidite was distributed fragmental-like in plane view, due to interplay of extensive extent deep lake and limited clastic supplying. Deep lake line was graduallymoved toward lake center and turbidite sand bodies were gradually developed better from stages of Chang-73, Chang-72 and Chang-71. And depositional evolution model in study area is established. There is better petroleum accumulation in deep lake, and turbidite sandstone can be better reservoir in deep lake. At present, some commercial oil wells were found in Southwest Ordos Basin and the turbidite sandstones can be the main exploration targets in the near future.

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