石油学报 ›› 2007, Vol. 28 ›› Issue (4): 126-129.DOI: 10.7623/syxb200704027

• 石油工程 • 上一篇    下一篇

胶乳对水泥石三轴力学形变能力的作用

李早元, 郭小阳, 韩林, 罗平亚   

  1. 西南石油大学油气藏地质及开发工程国家重点实验室 四川成都610500
  • 收稿日期:2006-04-21 修回日期:2006-08-16 出版日期:2007-07-25 发布日期:2010-05-21
  • 作者简介:李早元,男,1976年4月生,2006年获西南石油大学油气井工程专业工学博士学位,主要从事固井工程及油田化学外加剂教学及科研工作.E-mail:swpilzy@yahoo.com.cn
  • 基金资助:
    中国石油天然气集团公司重点科技项目(03A20203)资助

Improvement of latex on mechanical deformation capability of cement sheath under triaxial loading condition

Li Zaoyuan, Guo Xiaoyang, Han Lin, Luo Pingya   

  1. State Key Laboratory for Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China
  • Received:2006-04-21 Revised:2006-08-16 Online:2007-07-25 Published:2010-05-21

摘要: 针对套管、水泥环、地层三者间形变不协调而引起油气井生产后期层间封隔失效的问题,采用美国GCTS公司三轴岩石力学测试系统RTR-100,准确地测定了在三轴应力直接加载及三轴应力多周循环两种加载方式下水泥石的力学形变能力。实验结果表明,水泥浆中添加一定量的SBR胶乳,在降低油井水泥石抗压强度的同时增大了油井水泥石在低应力作用下的弹性形变和在高应力下的塑性形变,提高水泥石抗冲击破坏的能力。

关键词: 固井, 套管, 水泥环, 层间密封, 力学形变能力, 胶乳

Abstract: The deformation of cement sheath is often inconsonant with that of casing and formation.The mechanical deformation capability of cement sheath was accurately measured under the two conditions of triaxial stress directly loading and triaxial stress cycle loading by the triaxial rock mechanical test system RTR-100 of American GCTS Corporation.Experiment results showed that some doze of SBR latex could improve the mechanical deformation capability of cement sheath and decrease the compressive strength of that.The elastic deformation capability at low stress and the plastic deformation capability at high stress could also increase.Then the impact resistance strength could increase.The improvement of mechanical deformation capability of cement sheath and its accurate measurement are favorable for the coupling design of casing-cement sheath-formation deformation and ensuring the integrity and zonel sealing property of cement sheath.

Key words: cementing, casing, cement sheath, zonal sealing property, mechanical deformation capability, latex

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