煤系地层地震波区域性发育特征

Coal Measures Seismic Wave Regional Development Characters

由于地震勘探项目的相对独立,地震波运动学特征的分析只局限于单个采区,对区域性发育特征缺乏系统研究。根据华北、东北28个测区的地震数据体及其钻孔统计资料,在综合分析地震波区域性发育规律的基础上取得了垂向传播时间、速度与煤层埋深之间的定量关系:证明它们之间为近似抛物线形式;在特定条件下,埋深在一定深度范围内可用不过原点的直线近似拟合。这些经验公式可用于:(1)指导地震勘探设计、处理、解释;(2)解决地震解释中断面时深转换及缺少钻孔资料区区内目标层时深转换问题;⑶解决地质剖面中自动切制断层的难题.研究结果在安徽、河南、辽宁等地震工区使用,取得了理想的效果,提高了地震地质成果可靠性。

Since relatively independent of seismic prospecting projects, analysis of seismic wave dynamics character only limited in single district, and lack of regional development character systematical studies. Based on seismic data cube and borehole statistical information from 28 working areas in North China and Northeast China, have taken quantitative relation between vertical propagation time, velocity and buried depth after comprehensively analyzed seismic wave regional development pattern, proven that the relation between them is approximately a parabola. Under specific condition, buried depth within a certain depth range may fit proximately to use a line disjointed to zero point. These empirical formulae can be used in： （1） seismic prospecting designing, processing and interpreting guidance; （2） sectional time-depth conversion and target time-depth conversion in the areas lack of drilling data; （3） nodi in automatic locating of fault on geologic sections. The method has used in seismic prospecting in Anhui, Henan and Liaoning Provinces,and possessed perfect effects, while improved geological interpretation reliability.