Effect of coal-measure tight sandstone cementation on reservoir physical property in the south of Ordos Basin

被引：0
|
作者：
Jiu B. [1 ,2 ,3 ]
Huang W. [1 ,2 ,3 ]
Wang Y. [1 ,2 ,3 ]
Chen J. [1 ,2 ,3 ]
Lü C. [1 ,2 ,3 ]
Liang F. [1 ,2 ,3 ]
机构：
[1] School of Energy Resources, China University of Geosciences(Beijing), Beijing
[2] Key Laboratory for Marine Reservoir Evolution and Hydrocarbon Abundance Mechanism, China University of Geosciences(Beijing), Beijing
[3] Beijing Key Laboratory of Unconventional National Gas Geology Evaluation and Development Engineering, China University of Geosciences(Beijing), Beijing
来源：
Meitan Xuebao/Journal of the China Coal Society | 2018年 / 43卷 / 09期
关键词：
Carbonate cement; Cementation; Coal-measures gas; Ordos Basin; Silicate cement; Tight sandstone;
D O I：
10.13225/j.cnki.jccs.2017.1708
中图分类号：
学科分类号：
摘要：
The tight sandstone reservoir diagenesis of the Upper Paleozoic He-8 member in the south of Ordos basin is mainly based on compaction and cementation.Cementation is the most important diagenesis in the target member.Therefore,it is bound to have an effect on the porosity and permeability of reservoir.Based on cathode luminesce,SEM analyses and casting slice,the types and characteristics of cements are analyzed.As a result,the tight sandstone cementation of He-8 member is divided into three main types including silicate cementation,carbonate cementation and mud cementation.Besides,according to the occurrence status of different cements,silicate cement is divided into Type I (contact cement),Type II (overgrowth-edge cement),and Type III (mosaic cement); carbonate cement is divided into Type I (porous cement),Type II (particle replacement cement),Type III (crystal stock cement) and Type IV (base cement); and mud cement is divided into Type I (illite mud cement),Type II (clay matrix mud cement),Type III (chlorite grain-coating mud cement),and Type IV (kaolinite mud cement).Different cementing methods and the content of cement are not the same.By means of the quantitative analysis with Photoshop,the result shows that the particle replacement cement has little effect on the reservoirs physical property.The overgrowth-edge cement is positive to the reservoir storage space when the cement content is less than 5%.The crystal stock cement is negative to the reservoir storage space. © 2018, Editorial Office of Journal of China Coal Society. All right reserved.
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页码：2543 / 2552
页数：9
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