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复杂环境下水泥环全生命周期密封完整性研究进展与展望

丁士东 陆沛青 郭印同 李早元 卢运虎 周仕明

丁士东,陆沛青,郭印同,等. 复杂环境下水泥环全生命周期密封完整性研究进展与展望[J]. 石油钻探技术,2023, 51(4):104-113 doi: 10.11911/syztjs.2023076
引用本文: 丁士东,陆沛青,郭印同,等. 复杂环境下水泥环全生命周期密封完整性研究进展与展望[J]. 石油钻探技术,2023, 51(4):104-113 doi: 10.11911/syztjs.2023076
DING Shidong, LU Peiqing, GUO Yintong, et al. Progress and prospect on the study of full life cycle sealing integrity of cement sheath in complex environments [J]. Petroleum Drilling Techniques,2023, 51(4):104-113 doi: 10.11911/syztjs.2023076
Citation: DING Shidong, LU Peiqing, GUO Yintong, et al. Progress and prospect on the study of full life cycle sealing integrity of cement sheath in complex environments [J]. Petroleum Drilling Techniques,2023, 51(4):104-113 doi: 10.11911/syztjs.2023076

复杂环境下水泥环全生命周期密封完整性研究进展与展望

doi: 10.11911/syztjs.2023076
基金项目: 国家自然科学基金企业创新发展联合基金项目“复杂环境下水泥环全生命周期密封理论与控制方法”(编号:U22B6003)资助
详细信息
    作者简介:

    丁士东(1967—),男,江苏金湖人,1990年毕业于石油大学(华东)钻井工程专业,2007 年获中国石油大学(北京)油气井工程专业博士学位,正高级工程师,国家“百千万人才工程” 入选者,国家有突出贡献中青年专家,主要从事石油工程技术研究和相关管理工作。系本刊编委。E-mail:dingsd.sripe@sinopec.com。

  • 中图分类号: TE256+.9;TE26

Progress and Prospect on the Study of Full Life Cycle Sealing Integrity of Cement Sheath in Complex Environments

  • 摘要:

    受井下高温高压、酸性流体、固井后大规模分段压裂、油气开采等诸多因素影响,水泥环密封完整性极易遭受破坏,导致层间窜流、井口带压,甚至引发井喷。目前,以提高水泥环胶结质量为核心的水泥环密封控制技术,已无法满足复杂油气井长效开发需求,而随着深井、超深井与非常规油气井不断增多,未来面临的环境和工况更加复杂,对水泥环密封完整性的要求更高。为此,概述了复杂环境下水泥环全生命周期密封完整性研究进展,分析了目前水泥环密封完整性控制存在的主要问题,指出了未来应解决的基本理论和科学问题,并对未来相关技术进行了展望。研究认为,在持续研究高温高压环境下水泥水化及防窜理论、动载环境下水泥环密封失效规律、酸性环境下水泥石腐蚀机制的基础上,应突出全生命周期控制理念,解决“窜流、损伤、腐蚀”导致水泥环密封失效等关键科学问题,创新以水泥环密封完整性全生命周期监测技术和“防窜流、防损伤、防腐蚀”为核心的水泥环长效密封完整性控制技术,建立复杂环境下水泥环全生命周期密封理论与控制方法,支撑深层与非常规油气资源高效开发。

     

  • 图 1  典型水泥浆“液–固”态转化期的典型微观结构

    Figure 1.  Typical microstructure during the "liquid-solid" state transition of typical cement slurry

    图 2  高温循环载荷下的水泥石偏应力–应变曲线[17]

    Figure 2.  Stress-strain curve of cement stone under cyclic loading at high temperature

    图 3  防腐水泥浆体系设计思路

    Figure 3.  Design idea of anticorrosive cement slurry system

    图 4  用于修正测井方法的全尺寸固井水泥环模拟井群

    Figure 4.  Full-size cementing ring simulation of a well cluster for modified logging methods

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出版历程
  • 收稿日期:  2023-02-16
  • 修回日期:  2023-06-21
  • 网络出版日期:  2023-07-06

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