粘弹性介质中地震波的吸收衰减补偿方法

Compensation Method of Seismic Wave Absorption and Attenuation in Viscoelastic Media

地震波在地下介质中传播时,高频成分易被吸收。研究地震波的吸收与衰减机制可以部分地补偿被吸收与衰减的地震波成分,但是,实际地下介质的地震波吸收与衰减机制很复杂,非一个简单的数学模型可以充分描述的。尽管如此,地震波的吸收与衰减补偿对提高地质构造和岩性分布反演的分辨率仍有重要意义。地震波的吸收与衰减不但与岩性有关,而且也依赖于传播路径。因此,除了研究常规的单道吸收与衰减补偿方法外,研究沿地震波传播路径的吸收与衰减补偿方法更接近真实情况,补偿更准确。

The high frequency part of seismic wave propagation in subsurface is easy to be absorbed or attenuated. The study of mechanism of the seismic wave absorption and attenuation is conducted in order to partly compensate the high frequency part that is absorbed and attenuated. In fact, this complex mechanism is hardly to be described or compensated using a simple mathematic model and seismic instrument. However, the compensation is still of significance in improving the inverse resolution of geological structure and lithologic distribution. The absorption and attenuation of seismic wave propagation is not only related to lithology, but also depended on the complicated propagation path with non-vertical self-transmitting and self-receiving. It is concluded that studying the compensation method of seismic wave absorption and attenuation along its propagation path is more precise and closed to the real conditions than available single-trace compensation technique as a conventional or fundamental method.