用折射方法提取反射资料的解释参数

TO GET PARAMETERS OF REFLECTIVE EXPLANATION IN THE WAY OF REFRACTION

在浅层反射地震勘探中 ,速度参数的准确提取一直是广大数据处理和资料解释人员所追求的目标。多年来 ,广大物探工作者为了取得较好的解释效果 ,一般都采用钻孔资料反演或借用VSP资料来标定层位 ,但是由于浅层地质条件在横向上是千变万化的 ,这两种方法时常会张冠李戴 ,影响解释精度。利用地震折射方法在定量解释中能准确提取速度参数和反演界面深度的优势 ,在反射地震勘探剖面上 (满足折射勘探前提 )通过少量的地震折射排列提取反射资料的时深转换速度及层速度参数 ,对反射资料进行解释 ,可以取得较好的地质效果。应用实例说明这种方法不失为一种行之有效和经济快捷的方法。

In superficial reflective seismic exploration , the operators of data processing and interpreting have paid attention to how to get exact parameters, and made great efforts to achieve them. For many years, to gain good results, drilling and VSP information are usually adopted as layers, but sometimes they may be confused each other because superficial geologic information is metamorphic in landscape orientation. Time-depth transforming velocity and layer＇s velocity are gained in a little refracting seismic information, which leads to good result, because in mensurable explanation ,refracting seism may get exact parameters of velocity and interracial depth. The practical examples have indicated it is effective and inexpensive.