Mineralogical Mechanism of Micro-Remaining Oil Occurrence: An Example Study of Middle-Low Permeability Sandstone Reservoir of Ordos Basin

被引：0

作者：

Wang Z. ^{[1
]}

Shi Y. ^{[1
]}

Pan M. ^{[1
]}

Wang H. ^{[1
]}

Ma Z. ^{[1
]}

机构：

[1] School of Earth and Space Sciences, Institute of Oil and Gas, Peking University, Beijing

来源：

Beijing Daxue Xuebao (Ziran Kexue Ban)/Acta Scientiarum Naturalium Universitatis Pekinensis | 2021年 / 57卷 / 01期

关键词：

Energy spectrum analysis; Environmental scanning electron microscope; Micro-residual oil; Mineralogical mechanism; Occurrence state; Shape factor;

D O I：

10.13209/j.0479-8023.2020.116

中图分类号：

学科分类号：

摘要：

In order to figure out the existing problems of low visualization accuracy in the research of micro-residual oil and clarify its morphological characteristics, this study discussed the distribution of residual oil occurrence state and its relationship with minerals. We conducted an integrated approach of core observation, casting film, X-ray diffraction (X-RD), field emission environmental scanning electron microscope (FE-SEM) and energy-dispersive spectrometry (EDS) analysis on middle-low permeability sandstone reservoir in the 9th member of Yanan Formation and 2nd member of Yanchang Formation from Ordos Basin, China. The result shows that different pore structure forms have different storage capacity for remaining oil, it depends on the properties of matrix minerals corresponding to the pore, including mineral morphology, surface roughness, specific gravity, wettability, etc, which can be classified into five types: residual oil block mess, semi-free oil blob, semi-free oil island, semi-free oil mist and irreducible oil. © 2021 Peking University.

引用

页码：111 / 120

页数：9

共 13 条

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