Xinjiang Oil & Gas ›› 2026, Vol. 22 ›› Issue (1): 40-48.DOI: 10.12388/j.issn.1673-2677.2026.01.005

• OIL AND GAS EXPLORATION • Previous Articles     Next Articles

Numerical Simulation on the Damage Evolution Law of Casing-Cement Interface During Perforating

DING Jianxin1,SUN Wenyue2,YANG Zhiguo1,WANG Jianhua1,WANG Haitao1,XI Yan2,3   

  1. 1. Kunlun Digital Technology Co.,Ltd.,Shijingshan 100043,Beijing,China;2. Beijing University of Technology, Chaoyang 100124,Beijing,China;3. Chongqing Research Institute of Beijing University of Technology,Yubei 401100,Chongqing,China
  • Received:2025-09-02 Revised:2025-12-10 Accepted:2025-12-18 Online:2026-03-10 Published:2026-03-10

射孔过程中套管-水泥环界面损伤演化规律数值模拟

丁建新1,孙汶玥2,杨志国1,王建华1,王海涛1,席岩2,3   

  1. 1.昆仑数智科技有限责任公司,北京石景山  100043;2.北京工业大学,北京朝阳  100124;3.北京工业大学重庆研究院,重庆渝北  401100
  • 通讯作者: 席岩(1985-),2019年毕业于中国石油大学(北京)油气井工程专业,博士,副教授,主要从事岩石动力学方面的研究。(E-mail)xiyan@bjut.edu.cn
  • 作者简介:丁建新(1980-),2002年毕业于江汉石油学院计算机科学与技术专业,工程硕士,高级工程师,现为中国石油昆仑数智科技有限公司技术总监,长期从事油田技术服务行业数字化转型的技术研究工作。(E-mail)dingjianxin@cnpc.com.cn
  • 基金资助:
    国家自然科学基金面上项目“CCUS工程多场耦合及跨时空尺度条件下井筒密封完整性失效机理与控制方法研究”(52374001);重庆市自然科学基金项目“CCUS地质封存井气体泄露复杂路径形成机制与演化规律研究”(CSTB2024NSCQ-MSX0882);中国石油天然气集团有限公司数智中国石油重大专项“石油石化工业软件-钻井安全控制软件”(2024ZZ46-05)。

Abstract: During perforating,the high velocity jet penetrates the casing-cement-formation assembly. This not only causes damage to the cement sheath but also leads to bonding damage at the casing-cement interface. Such degradation tends to cause cross-flow of wellbore fluids along channels in the casing-cement interface,ultimately severely shortening the lifespan of oil and gas wells. Given this,a numerical model of high velocity jet penetration into the casing-cement-formation after perforating charge explosion is established using the fluid solid coupling method. The dynamic damage evolution law of the casing-cement bonding interface in the process of penetration is analyzed,and the effects of the cement sheath material parameter (shear modulus),cohesive unit parameter (fracture energy) and casing types on the damage area and maximum damage radius of the bonding interface are investigated. The results show that with the penetrating of jet,damage appears at the casing-cement sheath bonding interface,and the damage zone continuously expands. When the jet penetrates into the formation,the damage area reaches the maximum. With the increasing of shear modulus or fracture energy of cement sheath,the damage degree of the bonding interface decreases. Increasing borehole cleaning or using fiber containing cement slurry can reduce the damage of jet penetration to the bonding interface. When aluminum alloy,titanium alloy,nickel base alloy and other highly resistant casings are used,the damage area and maximum damage radius of the casing-cement bonding interface increase significantly during perforation penetration. The findings of this research provide theoretical support for wellbore integrity protection and engineering parameters optimization during perforating.

Key words: perforating, fluid solid coupling, casing-cement interface, damage, numerical simulation

摘要: 射孔作业过程中高速射流侵彻套管-水泥环-地层组合体,在导致水泥环本体损伤的同时也会造成套管-水泥环界面的胶结损伤,容易引发井筒内的流体沿着套管-水泥环界面发生窜流,进而严重缩短油气井的生命周期。采用流固耦合方法建立了射孔弹爆炸后高速射流侵彻套管-水泥环-地层的数值模型,分析了侵彻过程中套管-水泥环胶结面损伤动态演化规律,研究了不同水泥环材料参数(剪切模量)、内聚力单元参数(断裂能)以及套管类型对胶结面损伤面积和最大损伤半径的影响规律。研究结果表明,随着射流侵彻的进行,套管-水泥环胶结面出现了损伤且范围不断扩大,当射流侵入到地层后损伤面积达到最大值。随着水泥环剪切模量或断裂能的不断增加,胶结面的损伤程度不断减小,增加井眼清洁或者采用含纤维水泥浆有利于降低射流侵彻对胶结面的损伤。采用铝合金、钛合金、镍基合金等耐受性强的套管时,射孔侵彻过程中套管-水泥环胶结面的损伤面积和最大损伤半径会显著增加。研究成果可为射孔侵彻过程中井筒完整性的保障以及工程参数的优化提供理论支撑。

关键词: 射孔作业, 流固耦合, 套管-水泥环界面, 损伤, 数值模拟

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