用地震道积分法提高地层的识别能力

ENHANCEMENT OF THE DISCERNIBILITY ON FORMATION BY SEISMIC TRACE INTEGRATION

地矿部第一海洋地质调查大队

本文介绍了一种能得到类似于虚速度测井结果的新方法——地震道积分法,它不像虚测井那样依赖于井的资料和地球物理学家的经验,其结果对应于地层的波阻抗。道积分剖面能够用于岩性解释,而且对于薄层识别非常有利。文中在楔形模型上用不同频带滤波器的反射系数序列进行滤波,合成地震记录,计算对应的道积分响应。还设计了其它模型来考察地震道积分方法的效果。并且对实际资料进行了处理。

The paper presents a newly-developed technique,the Seismic Trace Integration[1] which yields a similar result as expected from the pseudo, velocity log. But it is unlike the pseudo velocity log depending so largely on the well-data and geophysicists’ personal experience. The effect from the Trace Integration could correspond to wave impedance. The trace integration section can be used for lithological interpretation. Moreover, it is proved very contributive to recognize the thin-layer.Also, what are elaborated in the paper include the performance done using different frequency band filters on the wedge model with regard to filtering of reflection coefficient series; synthesizing of seismogram and computing of corresponding trace integration response.In addition, models designed for observing and studying the effectiveness of Seismic Trace Integration Technique have been developed. And the field data processing is performed.