高孔砂岩断层内部微观结构及渗透性变化规律物理模拟

姜明明; 付晓飞; 石磊; 李坚达; 王皆明; 靳叶军; 朱华银; 王海学; 杜睿山; 孟令东

doi:10.3799/dqkx.2021.113

Volume 47 Issue 5

May 2022

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Jiang Mingming, Fu Xiaofei, Shi Lei, Li Jianda, Wang Jieming, Jin Yejun, Zhu Huayin, Wang Haixue, Du Ruishan, Meng Lingdong, 2022. Physical Analogue Experiment of Microstructure and Variation Law of Permeability within Faults in High-Porosity Sandstone. Earth Science, 47(5): 1805-1818. doi: 10.3799/dqkx.2021.113

Citation:

Jiang Mingming, Fu Xiaofei, Shi Lei, Li Jianda, Wang Jieming, Jin Yejun, Zhu Huayin, Wang Haixue, Du Ruishan, Meng Lingdong, 2022. Physical Analogue Experiment of Microstructure and Variation Law of Permeability within Faults in High-Porosity Sandstone. Earth Science, 47(5): 1805-1818. doi: 10.3799/dqkx.2021.113

Citation:

Jiang Mingming, Fu Xiaofei, Shi Lei, Li Jianda, Wang Jieming, Jin Yejun, Zhu Huayin, Wang Haixue, Du Ruishan, Meng Lingdong, 2022. Physical Analogue Experiment of Microstructure and Variation Law of Permeability within Faults in High-Porosity Sandstone. Earth Science, 47(5): 1805-1818. doi: 10.3799/dqkx.2021.113

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Physical Analogue Experiment of Microstructure and Variation Law of Permeability within Faults in High-Porosity Sandstone

doi: 10.3799/dqkx.2021.113

Jiang Mingming^{1
,
,},
Fu Xiaofei²,
Shi Lei^{3, 4},
Li Jianda¹,
Wang Jieming^{3, 4},
Jin Yejun^{1, 2, 5},
Zhu Huayin^{3, 4},
Wang Haixue^{1, 2, 5},
Du Ruishan^{1, 2, 5, 6},
Meng Lingdong^{1, 2, 5, 6
,
,}

1.
School of Earth Sciences, Northeast Petroleum University, Daqing 163318, China
2.
Key Laboratory of Continental Shale Hydrocarbon Accumulation and Efficient Development, Ministry of Education, Northeast Petroleum University, Daqing 163318, China
3.
CNPC Key Laboratory of Underground Storage of Oil and Gas Engineering, Langfang 065007, China
4.
PetroChina Exploration & Development Research Institute, Beijing 100083, China
5.
Heilongjiang Province Key Laboratory of "Integrity Evaluation of Oil and Gas Reservoirs", Northeast Petroleum University, Daqing 163318, China
6.
Heilongjiang FAPS Energy Technology Co. Ltd., Daqing 163318, China

Received Date: 2021-12-01
Publish Date: 2022-05-25

Abstract

Abstract

The research on the controlling factors of the oil and water sealing capacity of small-displacement faults to oil and water just scratches the surface of the problem in the process of oil and gas exploration, and it is difficult to obtain the internal structure and permeability change laws of the fault zone in different deformation processes in the field outcrop. Therefore, in this study it takes the artificial core of pure sandstone with high porosity as the research object, and uses the independently-developed "high-pressure and low-speed ring shear laboratory equipment" to carry out the experiment. After the experiment, the samples are cored for different analysis tests according to the needs, including permeability and porosity tests with overburden pressure, nano-CT scan, casting thin section analysis, etc. we have carried out several groups of ring shear experiments with effective normal stress and fault displacement as experimental variables. The research results show that macroscopically, obvious scratches and powdery cataclastic rock can be observed on the fault surface. Microscopically, the main reason for the decrease of porosity and permeability is the reduction of particle size and the directional arrangement of particles caused by the cataclastic in the fault zone. The fault zone permeability is less than 10 mD, 2~3 orders of magnitude lower than that of the host rock. With the increase of effective normal stress or sliding displacement, the cataclastic degree of fault zone increases, the particle size and pore diameter decrease, the thickness of fault zone increases, and the porosity and permeability decrease gradually. The study results lay a theoretical foundation for the study of the lateral sealing capacity of small-displacement faults in oil and gas exploration.
- high-porosity sandstone,
- ring shear,
- deformation mechanism,
- cataclasis,
- fault zone internal structure,
- permeability,
- petroleum geology

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References(55)

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Physical Analogue Experiment of Microstructure and Variation Law of Permeability within Faults in High-Porosity Sandstone

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