高分辨率地震采集方法的研究

从弹性波动理论出发,结合实际的浅层激发条件,系统的讨论了炸药源激发子波的形成及近地表附近地震波的传播特征,研究了地震激发井深与炸药量的地震激发机制,并对实际试验资料进行了分析,提出了地震激发条件的选择方法。从爆炸动力学的角度出发推导了理论上的最佳激发井深,指出了选择并深应优先考虑信噪比,井深的选择对增加地震信号的反射能量是重要的,在理论研究的基础上进行了实地试验,试验结果与理论研究成果是一致的。

Research on Acquisiton Method of High-resolution Seismic Exploration

From the point of elastic wave theory, combine with the condition of shallow excitation, the paper gives a system atic discussion on the forming of wavelet excited by the explosive source and propagation characteristic of seismic wave near the surface, and researches into seismic excitation mechanism of explosive charge and seismic excitation well depth, and analyses real data, puts forward method for choosing conditions of seismic excitation.Optimum excitation well depth was derived theoretically based on explosion dynamics, and indicate that must priority consider to the signal-to-nois ratio before choosing well depth. It is important to choose well depth for enhancing reflection energy from the seismic signal. Field testing had been carried out based on theoretical researches and the result is just the same as that from researches.