【摘要】 采用适用于层序地震学分析的时频分析方法,分别计算地震和测井曲线的时频谱。依据测井资料与地震资料沉积旋回时频谱特征以及显著反射界面在时频谱图像上的特征,利用测井资料与地震资料的时频谱研究层位对应关系。在合成记录标定的基础上,进行合成记录和井旁道的时频谱相关度分析,通过对应井震上相同层位旅行时对已有的时深关系进行校正,从而提高时深转换的精度。由于测井中存在漂移,且在井震标定中地震层位是固定不变的,测井层位相对于地震层位进行测井曲线的拉伸、压缩与平移。本文根据图像映射原理对测井曲线层位进行校正。基于一个参考时深关系,利用该方法对不同地区实际井震资料多种曲线进行时频分析及时深关系校正,取得了良好的效果。更多还原

【Abstract】 Using the time-frequency analysis method which is applicable to the seismic sequence analysis,this paper calculates seismic and well log time-frequency spectra,respectively.Based on the characteristics of the sedimentary cycle and remarkable-reflection interface time-sequency spectra,it studies the horizon corresponding relationship using the time-sequency spectra of the log data and seismic data.On the basis of the synthetic seismogram calibration,it also analyzes the correlation of the sequency spectra from the synthetic seismogram and the trace near the wed.Then,the existing time-depth relationship is corrected through the traveling time of the same horizon in the corresponding well and seismic in order to improve the accuracy of time-depth conversion.Because there exists drift in the logging and the seismic horizon is fixed in well-seismic calibration,the well log in the logging horizon is stretched,compressed and translated relative to that in the seismic horizon.According to the image mapping principle,the well log horizon is adjusted.Finally,based on a reference time-depth relation,the good effects are obtained by using this method to analyze the timesequency spectrum and correct the time-depth relationship of multiple curves of the real well and seismic data from different areas.更多还原