JL油田井间地震测量及纵,横波速度层析成像

我国地球物理工作者在ＪＬ油田利用重锤脉冲震源和多级三分量接收系统成功地进行了井间地震观测试验。本文简要介绍试验的过程，包括数据的采集和处理，重点阐述根据实测数据进行纵，横波速度层析成像处理的效果。

Cross-borehole seismic probing in JL oil field and the velocity tomography of compressional and shear waves

Chinese geophysic1sts have made an experimental cr0ss-boreh0le seismic 0bser-vation in JL oil field by using drop weight source and multistage three-componentreceiving system- The experimental process is briefly described, which inv0lves da-ta acquisition and data processing including the velocity tomography of compres-sional and shear waves in real data. Chinese geophysicists came to following conclu-slons:. The experimental observation is conducted in production boreholes, and realseismic data show quite high signal/noise ratio.. Borehole-side result of velocity tomography of cross-borehole compressionalwave coincides with acoustic logglng data quite satisfactory, thus it can be knownthat the veloclty tomography of cross-borehole selsmlc data 1s more reliable thanothers.. The low value part of the ratlo of P-wave velocity to S wave velocity, whichhas been derived fron1 the veloclty tomography results of P- and S-waves, tallieswith the interpreted resistivity logging data, and corresponds to producing reser-Vo1 r.. Lithology and fluld ln reservoir can be ascertained by comprehensivelyanalysing geologlca1 - logglng and other data in this area.