Characteristics of Nano-pores of Clay Minerals in Tight Reservoirs and Their Effects on Reservoir Properties: A Case Study of Yanchang-6 Oil Formation in Ordos Basin

被引：0
|
作者：
Wang H. [1 ,2 ]
Shi Y. [1 ,2 ]
Zhang Z. [1 ,2 ]
Sun T. [1 ,2 ]
Shi S. [1 ,2 ]
Guan P. [1 ,2 ]
Xu D. [3 ]
机构：
[1] School of Earth and Space Sciences, Peking University, Beijing
[2] Institute of Oil and Gas, Peking University, Beijing
[3] School of Petroleum Engineering, University of Science and Technology of Missouri, Rolla, 65401, MO
来源：
Beijing Daxue Xuebao (Ziran Kexue Ban)/Acta Scientiarum Naturalium Universitatis Pekinensis | 2020年 / 56卷 / 04期
关键词：
Clay minerals; Intercrystalline pore; Ordos Basin; Quantitative characterization; Reservoir property; Tight sandstone reservoir; Yangchang Formation;
D O I：
10.13209/j.0479-8023.2020.037
中图分类号：
学科分类号：
摘要：
In view of the lack of quantitative characterization of intercrystalline pores of clay minerals in tight sandstone reservoirs, the development characteristics of clay minerals and intercrystalline pore in Yanchang-6 oil formation in Ordos Basin were studied based on scanning electron microscope image and energy spectrum analysis. The intercrystalline pore parameters were quantified, and the intercrystalline pores of different types of clay minerals were characterized qualitatively and quantitatively. On this basis, the contribution of different types of clay minerals to reservoir porosity was calculated according to the mineral content, and the mechanism of its influence on the physical properties of tight reservoirs was explored. The results showed that there were significant differences in the development characteristics of different clay minerals and the characteristics of intercrystalline pores. The size trend of pore throat and facial rate of clay minerals was illite/smectite formation > chlorite > illite. Clay mineral development characteristics and pore structure were the main influencing factors of reservoir physical properties and residual oil distribution. © 2020 Peking University.
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页码：659 / 666
页数：7
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