地震资料面波波形计算研究

Waveform computation of seismic surface waves

中石化新星公司西南石油局第二物探大队, 四川成都610059

1. The Second Geophysical Prospecting Party of SINOPEC New Star Petroleum Exploration &Production, De yang 618000, China;2. Information Engineering College of Chengdu University of Science and Technology, Chengdu 610059, China

地震面波波形的计算是相当困难而又很有意义的研究课题,它不仅有利于地震资料的去噪处理,而且还可以直接利用面波信息探测地下含油气情况。经过一系列研究,取得了如下的一些成果:①引用地震波复速度及地震波能量吸收的形式来描述粘弹性介质;②应用目前国外粘弹性介质面波频散参数计算的快速算法,计算出了多阶振型地震面波的各阶频散参数;③运用哈特莱变换计算出多阶振型地震面波波形。

Waveform computation of seismic surface waves is a very difficult and yet very important topic. Information of surface waves can facilitate noise suppression, or even be used to detect hydrocarbon accumulation directly. This paper presents some results. 1) Aanelasticity is represented in terms of complex velocity and energy absorption of seismic waves. 2) Dispersion parameters of different orders of seismic surface waves are calculated with available fast algorithms of dispersion parameter computation for surface waves in a anelastic model. 3) Waveforms of seismic surface waves are calculated with fast Hartley transform.