基于频率搬移的地震资料约束测井资料外推

于地震资料本身频带有限的特性，导致在利用地震资料作为约束条件进行测井资料外推时存在奇异性. 文中利用通信中常用的频率搬移技术，将频带有限的地震资料转化成一种频带拓宽的伪超分辨率资料来控制测井资料的外推，从而解决地震资料约束下的测井资料外推技术中的奇异性问题. 并利用同相轴自动追踪和时频分析技术，解决子波时变的问题，实现沿地层自适应地外推测井资料. 对实际资料的测井速度和反射系数外推结果表明, 此法具有较好的应用前景.

SEISMIC-CONTROLLED EXTRAPOLATION OF WELL-LOG PARAMETERS BASED ON FREQUENCY-SHIFT

Since seismic data are band-limited, it leads to singularity of extrapolation of well-log data when using seismic data. To overcome the singularity, a novel technique based on frequency-shift, which is popular in communication, is proposed in this paper to extend the bandwidth of seismic data. It transforms the band-limited seismic data into pseudo-supper-resolution data by frequency-shift to control the extrapolation of well-log data. To be seasoned with time-variable wavelet, automatic seismic event tracking and time-frequency techniques are applied to extrapolate well-log data along the stratum adaptively. The results of the extrapolation of velocity and reflectivity show a good perspect of application.