薄层、薄互层地震反射时间域与频率域正演模拟研究及应用

由于地震勘探分辨率不高，使得每一个地震反射波都是由一组薄互层所产生的地震波相互叠加的结果，利用这样的地震资料进行常规的薄层，薄互层解释是十分困难的，本文对薄层，薄互层地震反射在时间域和频率域进行了正演模拟研究，制作了砂岩楔状及等厚互砂岩厚度与振幅，频率关系曲线，揭示了振幅，频率，波形与砂岩发育程度及互层结构之间的关系。最后利用振幅，频率和波形对汪家屯气田北块扶杨油层砂体进行综合预测，提高了预测精度

Study and application of the forward modeling of thin-layer and thin-interlay in the domains of time and frequency

The seismic exploration resolution is not so high that a seismic reflection wave is the result of a superposition of the thin-interlay reflections. It is very difficult to interpret thin-layer and thininterlay using such seismic data by usual methods. In this paper, the study of the forward modeling was conducted on the thin-layer and thin-interlay seismic reflections in the domains of time and frequency, and the relation curves were done between the thickness of the sand sphenoid body, interlay sandstone of the same thickness with amplitude, frequency. And the relation was revealed between amplitude, frequency, waveform and the degree of the sand development, and also interlay structure. At last, with the aid of characteristic parameters of amplitude, frequency and waveform, this paper made a prediction on the sand-body at Fuyang oil-layer in northern area of Wangjiatun gas field.