欢迎访问润滑与密封官方网站!

咨询热线:020-32385313 32385312 RSS EMAIL-ALERT
压裂封隔器密封系统流体穿透仿真研究
作者:
作者单位:

作者简介:

通讯作者:

中图分类号:

基金项目:

国家科技重大专项(2016ZX05038);国家重点研发计划项目(2016YFC0303302).


Study on Fluid Penetration Simulation of Fracturing Packer Sealing System
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    当压裂封隔器坐封成功后,胶筒与井壁表面仍存在微小泄漏间隙,原油、天然气、钻井液等介质在足够大的压差下会穿过间隙形成泄漏,导致封隔器的密封失效。为了从动态的角度研究封隔器胶筒密封失效的本质,建立封隔器流体穿透模型,通过高温下橡胶试样单轴拉伸试验数据与Mooney-Rivlin本构模型进行拟合,获得准确的橡胶超弹性本构模型参数。采用浸入边界法,模拟高压流体穿透封隔器导致封隔器密封失效的整个过程,并通过高温高压胶筒泄漏试验来验证该过程的正确性与准确性。仿真结果表明:封隔器胶筒失效的原因在于过高压力的流体穿透了胶筒与井壁(或套管壁)的接触面,形成了泄漏通道;当第一个密封胶筒失效时,泄漏临界液压值为7770 MPa,而高温高压试验井中测得的封隔器胶筒泄漏临界液压值为8239 MPa,试验与仿真之间误差值不超过10%,证明了模拟的流体穿透封隔器过程是准确的。

    Abstract:

    When the fracturing packer is seated successfully,there is still a small annular leakage gap between the rubber tube and the borehole wall or casing wall surface.The crude oil,natural gas and drilling fluid will leak through the gap under a sufficiently large pressure difference,which will lead to the seal failure of the packer.In order to study the nature of seal failure of packer rubber from a dynamic point of view,the fluid penetration model of packer was established.The exact parameters of rubber hyperelastic constitutive model were obtained by fitting the uniaxial tensile test data of rubber samples at high temperature with Mooney-Rivlin constitutive model.The process of fluid penetrating the packer was simulated by using the invasive boundary method.The simulation results show that the reason for the failure of the packer rubber is that the fluid with excessive pressure penetrates the contact surface between the rubber and the well wall(or casing wall),forming a leak path.The critical hydraulic pressure of leakage is 7770 MPa when the first seal cylinder fails,while measured critical hydraulic pressure of leakage by the high temperature and high pressure test well is 8239 MPa.The error between 〖JP3〗test and simulation result is less than 10%,which proves that the simulated process of fluid penetrating the packer is accurate.

    参考文献
    相似文献
    引证文献
引用本文

杨春雷,王国荣,李斌,郑旭,胡春昊.压裂封隔器密封系统流体穿透仿真研究[J].润滑与密封,2019,44(8):30-36.
. Study on Fluid Penetration Simulation of Fracturing Packer Sealing System[J]. Lubrication Engineering,2019,44(8):30-36.

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:
  • 最后修改日期:
  • 录用日期:
  • 在线发布日期: 2020-03-12
  • 出版日期: