基于核磁共振表征渝西地区五峰组-龙一<sub>1</sub>亚段页岩储层孔隙结构及非均质性

王子萌; 蒋裕强; 付永红; 雷治安; 徐昌海; 袁竟舟; 文冉; 王占磊; 谷一凡; 尹兴平

doi:10.3799/dqkx.2021.076

Volume 47 Issue 2

Feb. 2022

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Article Navigation > Earth Science > 2022 > 47(2): 490-504

Wang Zimeng, Jiang Yuqiang, Fu Yonghong, Lei Zhian, Xu Changhai, Yuan Jingzhou, Wen Ran, Wang Zhanlei, Gu Yifan, Yin Xingping, 2022. Characterization of Pore Structure and Heterogeneity of Shale Reservoir from Wufeng Formation-Sublayers Long-11 in Western Chongqing Based on Nuclear Magnetic Resonance. Earth Science, 47(2): 490-504. doi: 10.3799/dqkx.2021.076

Citation:

Wang Zimeng, Jiang Yuqiang, Fu Yonghong, Lei Zhian, Xu Changhai, Yuan Jingzhou, Wen Ran, Wang Zhanlei, Gu Yifan, Yin Xingping, 2022. Characterization of Pore Structure and Heterogeneity of Shale Reservoir from Wufeng Formation-Sublayers Long-1₁ in Western Chongqing Based on Nuclear Magnetic Resonance. Earth Science, 47(2): 490-504. doi: 10.3799/dqkx.2021.076

Citation:

Wang Zimeng, Jiang Yuqiang, Fu Yonghong, Lei Zhian, Xu Changhai, Yuan Jingzhou, Wen Ran, Wang Zhanlei, Gu Yifan, Yin Xingping, 2022. Characterization of Pore Structure and Heterogeneity of Shale Reservoir from Wufeng Formation-Sublayers Long-1₁ in Western Chongqing Based on Nuclear Magnetic Resonance. Earth Science, 47(2): 490-504. doi: 10.3799/dqkx.2021.076

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Characterization of Pore Structure and Heterogeneity of Shale Reservoir from Wufeng Formation-Sublayers Long-1₁ in Western Chongqing Based on Nuclear Magnetic Resonance

doi: 10.3799/dqkx.2021.076

Wang Zimeng^{1
,
,},
Jiang Yuqiang^{1, 2},
Fu Yonghong^{1, 2},
Lei Zhian³,
Xu Changhai⁴,
Yuan Jingzhou⁵,
Wen Ran⁶,
Wang Zhanlei^{1, 2},
Gu Yifan^{1, 2},
Yin Xingping^{1, 2}

1.
School of Geoscience and Technology, Southwest Petroleum University, Chengdu 610500, China
2.
Unconventional Reservoir Evaluation Laboratory, UOGKL, CNPC, Chengdu 610500, China
3.
Chongqing Shale Gas Exploration and Development Company Limited, Chongqing 400025, China
4.
Research Institute of Exploration and Development PetroChina Southwest Oil and Gas Field Company, Chengdu 610041, China
5.
PetroChina Southwest Oil & Gas Field Company, Chengdu 610051, China
6.
Sichuan Changning Natural Gas Development Company Limited, Chengdu 610056, China

Received Date: 2021-07-09
Publish Date: 2022-02-25

Abstract

Abstract

Select the organic-rich shale of the Wufeng Formation-sublayers Long-1₁ in western Chongqing to carry out field emission scanning electron microscopy, nuclear magnetic resonance and X-ray diffraction experiments. Based on image processing and multifractal theory, the pore structure of the shale reservoir was analyzed. Characteristics and heterogeneity. The results show that: (1) Scanning electron microscopy analysis shows that the average pore size of organic pores in the study area is too small. The number of organic pores < 50 nm accounted for 82%, and the number of organic pores >100 nm accounted for 52%; (2)According to the NMR T2 spectrum peak shape, it is divided into categories Ⅰ~Ⅲ, which are single-peak, double-peak and three-peak respectively. The shale reservoir of type Ⅲ has larger pore size and porosity, and has better storage conditions and seepage capacity; (3)Based on the multifractal theory to characterize the heterogeneity of the reservoir, the higher the quartz content, the lower the clay content, the weaker the heterogeneity, which in turn controls the porosity and permeability. The relationship between multifractal parameters and mineral components and physical property parameters effectively characterizes the pore structure of the reservoir and provides a new perspective for the evaluation of its heterogeneity.
- shale reservoir,
- pore structure,
- nuclear magnetic resonance,
- multifractal,
- heterogeneity,
- petroleum geology

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References(45)

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Characterization of Pore Structure and Heterogeneity of Shale Reservoir from Wufeng Formation-Sublayers Long-11 in Western Chongqing Based on Nuclear Magnetic Resonance

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Characterization of Pore Structure and Heterogeneity of Shale Reservoir from Wufeng Formation-Sublayers Long-1₁ in Western Chongqing Based on Nuclear Magnetic Resonance