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胡立新 ,杨德宽 ,何兵寿 ,魏修成 .延迟爆炸法的理论分析 .石油地球物理勘探 ,2 0 0 2 ,37(1) :33～ 38通过分析野外试验数据 ,研究了延迟爆炸情况下地震波的传播特点。采用正演模拟和其他数学手段 ,探讨了延迟爆炸时地震波主频、频宽、能量的变化规律 ,分析了入射角对上述因素的影响特征。研究结果表明 :相同药量条件下 ,采用延迟爆炸激发方式可增大地震波主频、拓宽地震波频宽、增大下行地震波能量 ;在常规地震勘探入射角范围内进行延迟爆炸激发时 ,由入射角所引起的地震波波形及其频谱畸变十分微小。从野外叠加剖面可看出 ,延迟爆炸法能够在一定程度上提高勘探分辨率
Theoretical Analysis of Delayed Explosion Method. Petroleum Geophysical Prospecting, 2002, 37 (1): 33 ~ 38 Based on the analysis of the field test data, the seismic wave propagation under delayed explosion The spread of characteristics. Using forward modeling and other mathematical methods, the variation rules of seismic wave frequency, frequency bandwidth and energy during delayed explosion are discussed, and the influence characteristics of incident angle on these factors are analyzed. The results show that under the same dose conditions, the delayed excitation method can increase the dominant frequency of seismic waves, broaden the bandwidth of seismic waves and increase the seismic energy of down-going waves. In the case of delayed explosion excitation within the range of conventional seismic exploration angles, Caused by the seismic waveforms and spectral distortion is very small. As can be seen from the field superimposed profiles, delayed explosion method to a certain extent, improve exploration resolution