CAJ | 학술논문

依据现代信号分析理论,对叠前地震道集剩余动校正黾的消除技术进行研究,在模型数据和实际数据的试验基础上,探讨基于时频分析技术的叠前道集校平方法.结果表明:通过对地震信号进行时频分解,并在信号重构时完成高精度的剩余动校正量的消除,处理前后信号振幅不变,道集同相性增强,叠加后信号有效频带变宽;利用近偏移距地震道的叠加道作为模型道,在有效消除剩余时差和校平同相轴的同时,避免了叠前道集动校拉伸畸变对模型道的影响,保证了技术实现的精度;该方法在消除叠前道集中剩余动校正量方面具有较强的实用性.
의거현대신호분석이론,대첩전지진도집잉여동교정민적소제기술진행연구,재모형수거화실제수거적시험기출상,탐토기우시빈분석기술적첩전도집교평방법.결과표명:통과대지진신호진행시빈분해,병재신호중구시완성고정도적잉여동교정량적소제,처리전후신호진폭불변,도집동상성증강,첩가후신호유효빈대변관;이용근편이거지진도적첩가도작위모형도,재유효소제잉여시차화교평동상축적동시,피면료첩전도집동교랍신기변대모형도적영향,보증료기술실현적정도;해방법재소제첩전도집중잉여동교정량방면구유교강적실용성.
In terms of the modern signal analysis theory and the experiment of model data and actual data, the method based on time-frequency analysis to conduct pre-stack gather smoothing was discussed through the research of eliminating the residual normal moveout( NMO) of the pre-stack gather. The results show that the amplitude remains unchanged after processing, gather in phase increases, and the effective frequency band of the post-stack signal broadens by time-frequency decomposition seismic signal and high-accuracy elimination residual NMO in signal reconstruction. Using sub-stack of near-offset seismic gather as a model trace, the impact of the dynamic stretching distortion on the model trace is avoided when the residual move-out is eliminated effectively and the event is flattened; thus the accuracy of the technology can be ensured. This method shows practicalness for eliminating the residual NMO in the pre-stack gather.