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Simulation Study on Sensitivity of Tubing-casing Annulus Leakage Parameters in High Temperature and High Pressure Gas Wells
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Yi-huai ZHANG1, 2, Li-ping TANG1, 2, *, Xiang ZHONG3, Li TANG4
Science Technology and Engineering | 2025, 25(20) : 8474 - 8482
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Science Technology and Engineering | 2025, 25(20): 8474-8482
• Papers·Petroleum and Natural Gas Industry •
Simulation Study on Sensitivity of Tubing-casing Annulus Leakage Parameters in High Temperature and High Pressure Gas Wells
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Yi-huai ZHANG1, 2, Li-ping TANG1, 2, *, Xiang ZHONG3, Li TANG4
Affiliations
  • 1 School of Mechatronic Engineering, Southwest Petroleum University, Chengdu 610500, China
  • 2 Sichuan Province Science and Technology Resource Sharing Service Platform for Petroleum and Natural Gas Equipment Technology, Chengdu 610500, China
  • 3 PetroChina Tarim Oilfield Company, Korla 841000, China
  • 4 PetroChina Tarim Petrochemical Company, Korla 841000, China
Published: 2025-07-18 doi: 10.12404/j.issn.1671-1815.2405824
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Due to factors such as temperature, pressure, and production rate, integrity issues like annular leakage in gas well tubing frequently occur frequently. In order to study the influence of working conditions on the process of downhole oil pipe leakage, a high temperature and high pressure oil pipe leakage simulation model was established based on field parameters and compared with the existing mathematical model of small hole leakage. Based on the simulation model, the influence of flow field change, leakage aperture, casing pressure difference and leakage environment on the leakage process was analyzed. The results show that the changes of flow field mainly focus on the inside of the leak hole and the inlet and outlet of the leak hole. With the increase of the leak aperture, the leakage quantity, leakage velocity, pressure and density inside the leak hole increase. The greater the pressure difference between tubing and oil jacket annulus, the greater the leakage amount and leakage velocity, and the more drastic the change of pressure and density. The gas velocity and pressure in the upper part of the annular protective fluid are greater than that in the annular protective fluid section.

tubing  /  multiphase flow  /  orifice leakage  /  tubing-casing annulus  /  numerical simulation
Yi-huai ZHANG, Li-ping TANG, Xiang ZHONG, Li TANG. Simulation Study on Sensitivity of Tubing-casing Annulus Leakage Parameters in High Temperature and High Pressure Gas Wells[J]. Science Technology and Engineering, 2025 , 25 (20) : 8474 -8482 . DOI: 10.12404/j.issn.1671-1815.2405824
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Year 2025 volume 25 Issue 20
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Article Info
doi: 10.12404/j.issn.1671-1815.2405824
  • Receive Date：2024-08-02
  • Online Date：2026-05-13
  • Published：2025-07-18
Article Data
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History
  • Received：2024-08-02
  • Revised：2025-04-22
Funding
Affiliations
    1 School of Mechatronic Engineering, Southwest Petroleum University, Chengdu 610500, China
    2 Sichuan Province Science and Technology Resource Sharing Service Platform for Petroleum and Natural Gas Equipment Technology, Chengdu 610500, China
    3 PetroChina Tarim Oilfield Company, Korla 841000, China
    4 PetroChina Tarim Petrochemical Company, Korla 841000, 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
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Genus		 种数
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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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