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Characterization of Pore Structure of Sand and Conglomerate Based on Micro-CT Scanning
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Wen-shuo XU1, Li-xi LIANG1, *, Jian-ru GOU2, Yi DING1, Xiang-jun LIU1
Science Technology and Engineering | 2025, 25(3) : 999 - 1007
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Science Technology and Engineering | 2025, 25(3): 999-1007
• Papers·Petroleum and Natural Gas Industry •
Characterization of Pore Structure of Sand and Conglomerate Based on Micro-CT Scanning
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Wen-shuo XU1, Li-xi LIANG1, *, Jian-ru GOU2, Yi DING1, Xiang-jun LIU1
Affiliations
  • 1. National Key Laboratory of Oil and Gas Reservoir Geology and Exploration, Southwest Petroleum University, Chengdu 610500, China
  • 2. Petroleum Engineering Technology Research Institute, Sinopec Northwest Oilfield Company, Urumqi 830001, China
Published: 2025-01-28 doi: 10.12404/j.issn.1671-1815.2401843
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Considering the characteristics of poor permeability, mixed particle sizes, and complex pore structures of conglomerates, a study was conducted on the pore structure characteristics and connectivity of the Mahu Urho Formation conglomerates using CT(computed tomography)scanning and 3D reconstruction techniques. By establishing a pore structure extraction method combining conventional threshold segmentation and top-hat algorithm, the challenge of extracting microcracks was overcome. The study reveals that the main types of pores in the Urho Group conglomerates are intergranular pores, dissolved pores, and microfractures, with the 3D pore types are mainly lamellar pore structures and isolated pore structures. Although pores with equivalent radii of conglomerate samples smaller than 30 μm account for a high proportion, their contribution to the total pore volume is relatively low. Pores larger than 60 μm, while fewer in number, occupy over 50% of the total pore volume, serving as the primary storage space. Experimental samples are predominantly characterized by level III connected domains, exhibiting good connectivity conducive to the accumulation and extraction of oil and gas. The investigation into the pore structure characteristics of strongly inhomogeneous conglomerates holds significant theoretical and practical value for an in-depth understanding of such characteristics and for the exploration and development of oil and gas reservoirs in sand conglomerates.

micro-CT scanning  /  sandy conglomerate  /  Urho Formation  /  extraction of microcracks  /  pore structure  /  pore connectivity
Wen-shuo XU, Li-xi LIANG, Jian-ru GOU, Yi DING, Xiang-jun LIU. Characterization of Pore Structure of Sand and Conglomerate Based on Micro-CT Scanning[J]. Science Technology and Engineering, 2025 , 25 (3) : 999 -1007 . DOI: 10.12404/j.issn.1671-1815.2401843
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Year 2025 volume 25 Issue 3
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Article Info
doi: 10.12404/j.issn.1671-1815.2401843
  • Receive Date：2024-03-14
  • Online Date：2025-07-29
  • Published：2025-01-28
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History
  • Received：2024-03-14
  • Revised：2024-05-21
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Affiliations
    1. National Key Laboratory of Oil and Gas Reservoir Geology and Exploration, Southwest Petroleum University, Chengdu 610500, China
    2. Petroleum Engineering Technology Research Institute, Sinopec Northwest Oilfield Company, Urumqi 830001, 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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