Ground Roll Wave Suppression Based on the Combination of Adaptive and Curvelet Transform
The ground roll wave is one of the serious interference waves in the seismic raw data,and the split frequency progressive method which based on the combination of adaptive and curve let transform was proposed to suppression it.Firstly,the adaptive method was used to suppression the majority of the ground roll wave,the step includes that,statistics the characteristic parameters of ground roll wave by time frequency analysis,simulate the ground roll wave and suppress the medium and low frequency components using the method of least-squares adaptive subtraction.Secondly,the curvelet transform was used to suppression the residual noise,we carried out the transform and separated the residual ground roll wave and the effective wave,and then by processing the curvelet coefficient the high frequency component was further suppressed.The combined method can eliminate the high and low frequency components of the ground roll wave step by step,and better protect the low frequency information of the original data,so it is a relative amplitude preserving method for ground roll wave attenuation.The test effect of the actual data shows the effectiveness and utility of this method.
seismic prospectingadaptive filtercurvelet transformground roll wavetime-frequency analysis
万方数据
维普
