摘要
地震波激发方式是影响地震数据采集质量的主要因素之一。本文以野外试验数据为基础,对时延爆炸法原理进行了分析。运用数值模拟和其它数学手段,分析了延迟爆炸情况下地震波主频、频宽、能量的变化规律,研究了入射角对上述因素的影响特征。分析表明:相同药量条件下,采用延迟爆炸的激发方式可增大地震波主频,拓宽地震波的频带宽度,增大向下传播的地震波能量;在常规地震勘探的入射角范围内进行时延爆炸激发时,由入射角变化所引起的地震波波形及其频谱的畸变可忽略不计。
Dynamite source pattern in seismic data acquisition is one of main factors influencing quality of seismic data. Based on the field experiment, a theoretical analysis of time-lapse explode method is proposed in the paper. Using forward molding and other mathematical method, the changes of main frequency, frequency bandwidth, energy and the influence of incidence angle on above factors are studied, which indicate time-lapse explode method can improve the main frequency, widen the frequency bandwidth, enhance the seismic energy successfully. The study also implies that under the condition of time-lapse explode, the influence of incidence angle can be ignored.
出处
《中国煤田地质》
2001年第4期47-49,共3页
Coal Geology of China
