天然气地质学

安塞地区延长组沉积微相研究

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  • 1.长安大学资源学院,陕西 西安 710054;2.西北大学地质学系,陕西 西安 710069;3.长庆油田分公司第一采油厂,陕西 延安 716000
赵虹(1967-),女,陕西户县人,博士研究生,主要从事沉积学与石油地质学研究.

收稿日期: 2004-05-24

  修回日期: 2004-07-28

  网络出版日期: 2004-10-20

基金资助

国家“973”项目(编号:2003CB214602)资助.

MICROFACIES CHARACTERISTIC OF YANCHANG FORMATION  IN ANSAI DISTRICT

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  • 1.Institute of Resources, Chang'an University, Xi'an 710054, China; 2.Department of Geology, Northwest University, Xi'an 710069, China; 3.No.1 Oil Producing  Plant, Changqing Oilfield=Branch Company, Yan'an 716000, China

Received date: 2004-05-24

  Revised date: 2004-07-28

  Online published: 2004-10-20

摘要

通过对野外剖面及岩芯的观察和描述,将鄂尔多斯盆地安塞地区延长组划分出9个岩石相和6个岩石相组合。在建立岩-电模式的基础上,根据测井曲线,对沉积相的电性特征进行了分析。结合岩石相和测井相,分析了安塞地区延长组的沉积相类型及特征,同时对沉积相与油气的关系进行了分析。结果表明,延长组长2油层组为辫状河沉积,长3和长10油层组为曲流河沉积,长9、长7及长4+5油层组为湖相沉积,而长6和长8油层组为三角洲前缘沉积。认为河道砂坝沉积微相及水下分流河道沉积微相为区内良好的储集层,是油气开发的方向。

本文引用格式

赵虹,党 犇,李文厚,杨晓奇,党永潮 . 安塞地区延长组沉积微相研究[J]. 天然气地球科学, 2004 , 15(5) : 492 -497 . DOI: 10.11764/j.issn.1672-1926.2004.05.492

Abstract

According to the outcrops observing and the cores describing,Yanchang  formation has been classified 9 petrology facies and 6 petrology facies units. On the basis of establishing the model between petrology and electricity, the types of the electrofacies have been analyzed. Connecting the petrology facies with the electrofacies, the types and the characteristics of the  sedimentary microfacies in Yanchang formation have been studied. It indicated that Chang 2 belong to the braided river facies, Chang 3 and Chang 10 are the  meandering fluvial facies, Chang 9,Chang 7 and Chang 4+5 are lacustrine facies, while Chang 6 and Chang 8 are front-delta facies. The sand bar microfaces and the  distributary channel microfaces are the good reservoir. They led to the directions of oil and gas exploration and development.

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