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Characterization and reconstruction of meso-structure of gas-bearing soils at different storage pressures
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Zhenqi Guo1, Tao Liu1, 2, 3, *, Chen Wu1, Xiuting Su1, 4, Sanpeng Li1
Haiyang Xuebao | 2021, 43(11) : 96 - 104
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Haiyang Xuebao | 2021, 43(11): 96-104
• Article •
Characterization and reconstruction of meso-structure of gas-bearing soils at different storage pressures
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Zhenqi Guo1, Tao Liu1, 2, 3, *, Chen Wu1, Xiuting Su1, 4, Sanpeng Li1
Affiliations
  • 1College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
  • 2Laboratory for Marine Geology, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China
  • 3Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering, Qingdao 266100, China
  • 4SGIDI Engineering Consulting (Group) Co., Ltd Qingdao Branch, Qingdao 266199, China
Published: 2021-11-25 doi: 10.12284/hyxb2021154
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The storage pressure and reconstruction of the mesostructure of gas-bearing sediments are key factors in the study of shallow gas geohazards. Using an industrial CT scanning test system, vertical rotational (SR) scanning is used, with the position of the microfocus X-ray source fixed and the sample rotated at a constant speed of 360° along the XY plane, with a set rotation step of 0.3° per second, the gas-bearing samples in the reactor are pressurized to 2 MPa, 4 MPa, and 6 MPa, taking into account the best resolution of the sample imaging, the best detection range and other. The results show that the slices and reconstructed images obtained from the CT scan have good experimental results; the greyscale values of small bubbles increase when pressurized to 2 MPa; the overall greyscale values of gas increase significantly when pressurized to 6 MPa; the number of bubbles decrease with increasing bubble radius during the pressurization process; the pressurization process lead to local changes in the solid-liquid-gas phase, which show that the volume of pore gas and pore water changes more than that of the soil skeleton. The overall change is greater than that of the soil skeleton, and the microscopic local location will have a greater rise or decrease. When the gas content at different locations rises and dominates, it will drive the reduction of pore water and the movement of the soil skeleton.

gas bearing sediments  /  gas reservoir pressure  /  microstructure  /  CT scan
Zhenqi Guo, Tao Liu, Chen Wu, Xiuting Su, Sanpeng Li. Characterization and reconstruction of meso-structure of gas-bearing soils at different storage pressures[J]. Haiyang Xuebao, 2021 , 43 (11) : 96 -104 . DOI: 10.12284/hyxb2021154
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Article Info
doi: 10.12284/hyxb2021154
  • Receive Date：2020-11-04
  • Online Date：2026-02-26
  • Published：2021-11-25
Article Data
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History
  • Received：2020-11-04
  • Revised：2021-01-14
Funding
Affiliations
    1College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
    2Laboratory for Marine Geology, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China
    3Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering, Qingdao 266100, China
    4SGIDI Engineering Consulting (Group) Co., Ltd Qingdao Branch, Qingdao 266199, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
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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