纵横波浅层折射和纵横波微测井方法联合应用研究

Joint application of the shallow refraction and microlog methods for both Pwave and S-wave

1. 南京石油物探研究所, 南京 210014;2. 东北石油局, 长春 130062

Research Institute of Geophysical Prospecting for Petroleum, CNSPC, Nanjing 210014

在一个工区同时开展了浅层纵横波折射、纵横波微测井的野外勘探,并取得较为丰富的野外资料以及处理和解释成果。本文着重介绍野外采集方法及最终解释成果。在横波微测井观测过程中,灵活性地解决了一些施工难题,并取得了较为理想的资料。在对比纵横波折射和纵横波微测井所求数据的基础上,首次用地震方法获取了该工区浅水面的高程,并得出了一些有意义的结论。获得了低速带的纵横波速度,低速带的高程以及低速带的层厚度。通过对比微测井和小折射求得的速度,最终给出了整个工区的纵波及横波低速带校正值。

Field surveys of the shallow refraction and microlog for both P-wave and S-wave have been made simultaneously in a work area. Rich field data and processing and interpretation results are obtained. In the paper, the field acquisition method and the final interpretation result are introduced emphatically.In the S-wave microlog survey, we flexibly solve some difficult woking problems and obtain desirable data. Also, SH-wave shallow refraction data with high S/N ratio are obtained. Based on the correlation of data derived from refraction and microlog for both P-wave and S-wave, we acquire the water table elevation in the work area by seismic method for the first time and draw some meaningful conclusions. P-wave and S-wave velocities, elevations, and layer thickness of the low velocity zone are derived.Finally, through the correlation of velocities extracted from microlog and weathering refraction shooting,the low velocity zone correction value for both P-wave and S-wave is given for the whole work area.