井傍地震资料拟合技术及其应用

THE FITTING TECHNIQUE FOR SEISMIC DATA FROM NEARBY WELL AND ITS APPLICATION

中国海洋石油总公司勘探开发研究中心

本文论述了井傍地面地震、VSP及合成记录三种资料循环拟合的技术方法,包括三种资料在拟合前的准备、在过井地震剖面上确定最佳拟合位置、短时窗移动拟合、最终全面拟合和残差分析。应用拟合技术能够准确地确定这三种资料反射同相轴的时间关系,评价它们的质量,从三种资料的差异中提取有用的地质信息。将这一技术应用于我国海域A井时,获得了良好的效果。

This paper deals with the fitting technique used, in turn, for processing the data from nearby well, VSP and synthetic seismogram, which include set-ups prior to performing the fitting technique, locating the optimum fitting on cross-hole seismic section, fitting by moving the small windows and finally doing an overall fitting and residual error analysis. By using the fitting technique, we can exactly define the time interrelation of reflection lineups of the above-mentioned 3 different data and an assessment is made with respect to its quality. From which we can extract the available geological information.The fitting technique being discussed has yielded a substantial result since it was implemented at Well A in China’s marine territory.