CAJ | 학술논문

扫描信号的相关旁瓣是影响可控震源资料质量的主要因素.在常规可控震源扫描信号的设计中,通过对扫描参数的优化选择,可以使相关旁瓣有所减少,但不能彻底消除相关旁瓣的影响.可控震源扫描信号整形设计方法根据Ricker子波无旁瓣的特性,通过整形算法设计扫描信号,使其能够满足相关子波等于Ricker子波、振幅谱等于Ricker子波频谱的要求,将整形扫描信号以文本方式提供给可控震源.以整形设计产生的扫描信号代替扫描信号发生器产生的非线性扫描信号,可以大大提高资料的信噪比.新疆某地区的试验结果表明,该方法是可行和有效的.
소묘신호적상관방판시영향가공진원자료질량적주요인소.재상규가공진원소묘신호적설계중,통과대소묘삼수적우화선택,가이사상관방판유소감소,단불능철저소제상관방판적영향.가공진원소묘신호정형설계방법근거Ricker자파무방판적특성,통과정형산법설계소묘신호,사기능구만족상관자파등우Ricker자파、진폭보등우Ricker자파빈보적요구,장정형소묘신호이문본방식제공급가공진원.이정형설계산생적소묘신호대체소묘신호발생기산생적비선성소묘신호,가이대대제고자료적신조비.신강모지구적시험결과표명,해방법시가행화유효적.
The relative side lobe of sweeping signal is an important factor impacting the seismic data quality acquired by vibrator.In conventional vibrator sweeping signal design,the side lobes will be decreased by optimizing sweeping parameters,but it cannot entirely remove the influence of relative side lobes.In terms of the characteristics of Ricker wavelet without side lobes,shaped design method of vibrator sweeping signal is by designing sweeping signal,to satisfy that the correlation wavelet is equal to Ricker wavelet,and its amplitude spectrum is equal to the frequency spectrum of Ricker wavelet,to provide shaped sweeping signal in text format to vibrator.Replacing non-linear sweeping signal produced by sweeping signal generator with sweeping signal produced by shaped design can largely improve the S/N of seismic data.The testing results in some area of Xinjiang province indicate that the method is feasible and effective.