摘要
在采用声波全波列测井评价固井质量时,由于低密度水泥比高密度水泥的声耦合差,会对评价结果造成很大的误差。通过数值模拟和波形对比,分析了低密度水泥固井对套管波幅度的影响,进而提出了在固井质量评价中的套管波幅度校正方法,把低密度水泥固井的套管波幅度校正到高密度水泥固井时套管波幅度,这样可用常规水泥固井评价标准来进行评价。实际资料处理证明了该方法的有效性。
When the cementing quality was evaluated with acoustic full waveform logging data,big errors were caused on evaluating results because the acoustic coupling to the low density cement was poorer than that of high density one.The effect of low density cement on casing wave amplitude was analyzed based on numerical simulation and waveform contrasting.The method was proposed for wave amplitude correction in cementing quality evaluation.Data obtained in application demonstrate that the method is effective.
出处
《石油天然气学报》
CAS
CSCD
北大核心
2008年第5期77-80,共4页
Journal of Oil and Gas Technology
基金
教育部重点实验室开放基金项目(2006Z0202)
关键词
低密度水泥固井
套管波
固井质量
校正
low-density cementing
casing wave
cementing quality
correction
