地震勘探中炸药震源药型选择问题研究

Research on the problem of dynamite type selection in seismic prospecting

石油物探局科技处,涿州 O72751

Division of Science and Technology, Bureau of Oil Geophysical Prospecting. CNPC, Zhuozhou 072751

运用炸药爆炸理论, 从炸药爆炸作功机理角度, 论述了炸药对地震勘探中激发能量和激发频率的影响。理论分析和生产实验表明, 选择合适的小药最高能炸药, 能够提高炸药作功能力, 增强激发能量, 有利于激发出较强能量的高频震源子波。在含水的高密度介质中, 高频能量衰减小, 传递效率高, 能够获得高品质的地震资料, 为地震解释提供更多的信息。

This paper discusses the effect of dynamite selection on excitation energy and frequoncyfrom the angle of doing -work mechanism of dgnamite explosure by using the theory of dynamite explo-sure Theorectical analysis and field experiments show that the selection of appropriate small-chargehigh-energy dynamite can improve the droamite work capability and enhance the excitation energy,therefore beneflcial to generating high-frequency source wavelet with relatlvely high energy. In high-density medium, high-frequency seismic wave attenuates slowly and has a high transmission efficiency.Thus high-quality seismic data can be obtained, which provides more informtion to seismic interpreta -tion.