水泥环缺陷对套管强度影响研究现状及展望

RESEARCH ON THE INFLUENCE OF DEFECTIVE CEMENT RING ON CASING STRENGTH

在目前国内外的固井施工过程中,往往存在着固井质量不合格的情况,由于顶替效率过低、气窜等原因造成的水泥环缺陷,会大大降低套管的承载能力,减少套管的使用寿命,因此水泥环缺陷对套管强度的影响研究显得非常重要。通过查阅大量文献资料,总结了目前国内外关于水泥环缺陷对套管强度影响的研究现状,分析了所面临的主要技术难点,展望了该研究的发展趋势,指出应结合现场水泥环缺陷实际情况,建立更贴近现实的水泥环缺陷模型,确立推广一套较完善的水泥环缺陷对套管强度影响的研究体系,进一步完善水泥环缺陷形态。进行室内实验与现场调研以及电脑断层扫描技术、计算机辅助软件等技术的研究,以提高水泥环缺陷对套管强度影响研究水平。

For the cement ring defect caused by the low replacement efficiency and gas channeling will greatly reduce the bearing capacity and the service life of the casing,the research on the influence of cement ring defect on casing strength is very important. Through consulting massive literature data,the research status about the effect of cement sheath defect on casing strength were summarized at home and abroad,the main technical difficulties were analyzed,and the development trend of the research was pointed out. That is to say,combining the practical situation of field cement sheath defect,the cement sheath defect model should be established; a set of more perfect research system about the influence of cement ring defect on casing strengthshould be determined to improve the cement sheath defect morphology,and the research level should be enhanced by indoor experiment and field investigation and computer tomography technology,computer aided software technology and so on.