地震勘探中速度信号转化为加速度信号的分析及应用

目前,广泛应用在地震勘探中的检波器类型主要是速度型检波器和加速度型检波器,分别接收振动的速度信息和加速度信息,不同类型的检波器接收的地震资料具有不同的响应特征.在滩浅海地震勘探中,不同的地表区域使用不同类型的检波器接收,滩上使用速度检波器接收、海中使用加速度检波器和速度检波器组成的"双检"检波器接收,所以存在着两类检波器资料的拼接、融合处理问题.本文在理论上通过速度检波器和加速度检波器机电转化原理不同,跟踪不同物理量说明了两种信号之间的关系,并通过理论分析、实际的地震数据资料分析和证明了速度信号通过微分计算转化为加速度信号的可行性和正确性,并进行了相应的对比和验证.在滩浅海以及浅海地震勘探中应用加速度检波器和速度检波器联合采集后,应用这种转换方法进行资料的拼接处理和融合处理,得到的地震剖面质量得到了很好的提升.

Analysis and application of the conversion of velocity signal into acceleration signal in seismic exploration

At present,the types of geophones widely used in seismic exploration are mainly velocity geophones and acceleration geophones.They receive vibration velocity information and acceleration information respectively.Different types of geophones receive different seismic data with different response characteristics.In transition zone and shallow sea seismic exploration,different surface areas use different types of geophones reception,on the beach use velocity geophones reception,and in the sea use acceleration geophone and velocity geophone composed of“double geophones”reception.Therefore,there are two kinds of data splicing and fusion processing problems.This paper theoretically explains the relationship between the two signals by tracking different physical quantities through the principle of electromechanical conversion of velocity geophone and acceleration geophone.The feasibility and correctness of velocity signal converted into acceleration signal through differential calculation are proved by theoretical analysis and actual seismic data analysis.After using acceleration geophone and velocity geophone in shallow sea and shallow sea seismic exploration,the data splicing and fusion are processed by using this conversion method,and the quality of the seismic profile obtained is improved.