确定合成地震记录子波主频的方法研究

针对目前合成地震记录质量不高导致层位标定解释、构造解释、储层反演精度低的问题．基于模型正演研究认为合成地震记录质量不高的原因主要是地震子波主频与实际地震子波主频不一致造成的；研究据此提出了基于模型建立地震子波主频与实际地震记录主频两者的差异之间的关系，在实际的应用过程中根据已建立的差异关系和实际地震记录主频可以获得比较准确的地震子波主频，利用这样的主频子波进行合成可获得较好的合成地震记录质量。

Method to Determine the Dominant Frequency of the Synthetic Seismogram

In consideration of the problem of lower precision of horizon calibration and interpretation, structural interpretation, reservoir inversion .according to the forward modeling theory, the major reason resulted from the difference between the seismic wavelet dominant frequency and practical seismic wavelet dominant frequency, was the lower quality of synthetic seismogram. However, based on the modeling theory, the dominant frequency of seismic wavelet and practical dominant frequency of seismic wavelet and their difference of relationships were all induced by the disagreement. Furthermore, the dominant frequency of accurate seismic wavelet would be obtained because of the difference of relationships, thus the synthetic seismogram of higher quality is achieved with this kind of dominant frequency wavelets.