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Control Mechanism of Micro-pore Throat Structure of Deep Tight Sandstone on Gas-Water Relative Permeability Curves
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Lu ZHOU1, Qin-gong ZHUO2, 3, 4, Xiang LUO1, 5, *, Yan-jie GONG2, 3, 4, You-you CHENG5, Xu HU2, 6, Jin-zhou WANG2, 3, 4, Guo-wei ZHANG2, 3, 4
Science Technology and Engineering | 2025, 25(1) : 128 - 136
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Science Technology and Engineering | 2025, 25(1): 128-136
• Papers·Petroleum and Natural Gas Industry •
Control Mechanism of Micro-pore Throat Structure of Deep Tight Sandstone on Gas-Water Relative Permeability Curves
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Lu ZHOU1, Qin-gong ZHUO2, 3, 4, Xiang LUO1, 5, *, Yan-jie GONG2, 3, 4, You-you CHENG5, Xu HU2, 6, Jin-zhou WANG2, 3, 4, Guo-wei ZHANG2, 3, 4
Affiliations
  • 1. Tarim Oilfield Company, PetroChina, Korla 841000, China
  • 2. Research Institute of Petroleum Exploration and Production,PetroChina, Beijing 100083, China
  • 3. National Key Laboratory of Enhanced Oil and Gas Recovery, CNPC, Beijing 100083, China
  • 4. Key Laboratory of Basin Tectonics and Oil and Gas Accumulation, CNPC, Beijing 100083, China
  • 5. School of Geosciences and Engineering, Xi’an Shiyou University, Xi’an 710065, China
  • 6. School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China
Published: 2025-01-08 doi: 10.12404/j.issn.1671-1815.2308527
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The pore structure of deep tight sandstone reservoir is complex and heterogeneous, and it is difficult to determine the influencing factors of pore microscopic parameters on the characteristics of gas-water phase permeability. Based on the fractal geometry theory, combined with the core mercury intrusion porosimetry (MIP) method, nuclear magnetic resonance (NMR) T2 spectroscopy test and micron CT scanning results, the micro-pore throat parameters and various scale fractal dimensions of the reservoir were obtained. Through the mobile gas porosity and the maximum atmospheric phase relative permeability, the control mechanism of the fractal dimension and micro-pore throat structure parameters on the gas-water phase permeability characteristics was discussed. The results show that mercury injection and NMR fractal curves have obvious “three-stage” characteristics, and the total shape dimension of the reservoir describes the distribution of seepage and movable fluid more accurately when gas and water coexist. The maximum mercury saturation, average pore throat radius, total reservoir shape dimension and displacement pressure have significant effects on the mobile gas porosity during gas seepage. The average pore throat radius has a significant influence on the maximum effective gas phase relative permeability in gas seepage. The control mechanism of the micro-pore structure on the gas-water phase permeability can provide a powerful guide for the efficient development of water-producing gas reservoirs.

deep tight sandstone  /  fractal dimension  /  microscopic pore throat  /  influence factor  /  gas-water phase permeability characteristics
Lu ZHOU, Qin-gong ZHUO, Xiang LUO, Yan-jie GONG, You-you CHENG, Xu HU, Jin-zhou WANG, Guo-wei ZHANG. Control Mechanism of Micro-pore Throat Structure of Deep Tight Sandstone on Gas-Water Relative Permeability Curves[J]. Science Technology and Engineering, 2025 , 25 (1) : 128 -136 . DOI: 10.12404/j.issn.1671-1815.2308527
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Year 2025 volume 25 Issue 1
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Article Info
doi: 10.12404/j.issn.1671-1815.2308527
  • Receive Date：2023-11-01
  • Online Date：2025-07-29
  • Published：2025-01-08
Article Data
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History
  • Received：2023-11-01
  • Revised：2024-07-19
Funding
Affiliations
    1. Tarim Oilfield Company, PetroChina, Korla 841000, China
    2. Research Institute of Petroleum Exploration and Production,PetroChina, Beijing 100083, China
    3. National Key Laboratory of Enhanced Oil and Gas Recovery, CNPC, Beijing 100083, China
    4. Key Laboratory of Basin Tectonics and Oil and Gas Accumulation, CNPC, Beijing 100083, China
    5. School of Geosciences and Engineering, Xi’an Shiyou University, Xi’an 710065, China
    6. School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China
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表12种不同金属材料的力学参数
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Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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