黄土塬地区地震勘探激发技术探讨

针对黄土塬地区激发岩性疏松，吸收衰减严重以及黄土层下伏高速层，下传能量弱等问题，探讨了激发因素对地震资料品质的影响，提出了改善激发质量的对策。首先，对黄土塬地区的表层和地下地震地质条件以及干扰波特征进行了分析，然后，在分析激发因素的基础上进行了激发方式，激发井深，激发药量等试验，并通过对比分析试验资料，确定了中深井，小药量，多井组合的激发方式。利用该激发方式获得的地震资料，频率高，有效反射能量强，信噪比高，资料的品质明显提高。

Research on shooting techniques of seismic prospecting in Huangtuyuan area.

Aimed at the problems of loose lithology,serious attenuation of absorption,and weak energy transmitted downward because of being shielded by the underlying strata in Huangtuyuan area,the impaction of shooting factors on seismic data quality was researched and the countermeasures of improving shooting quality were pro- posed.First,ground and underground seismic geology and distur- bing wave features in Huangtuyuan area were analyzed.Then, means,depth and explosive quantity of shooting were experimen- ted in terms of former analysis.The shooting manner of middle depth,small amount of explosive and multi-well group was deter- mined through contrasting and analyzing experimental data.The seismic data obtained from this method has a high frequency, strong effective reflection energy,and a high signal/noise ratio. Therefore the data quality has been obviously improved.