用一种震源设备实现多波VSP观测的可能性

本文通过对新疆几口井的可控震源三分量ＶＳＰ观测资料的研究表明：在很多地区，水平震源激发时，不仅可观测到Ｓ波，也可观测到能量较强的Ｐ波；垂直震源激发时，不仅可观测到Ｐ波和ＳＶ波，也可观测到能量足够强的ＳＨ波。

The possibility of multiwave VSP exploration with one kind of source

The results obtained through studing tricomponent VSP data with vibroseis from wells inXinjiang Uygur Autonomous Region show that in many places when horizontal sources (or S wavevibroseis ) are used S wave can be detected and so can more powerful P wave,when vertical sources(or compressional wave vibroseis ) are used P wave and SV wave can be detected and so cansufficiently powerful SH wave,through proper proecssing P wave in the case of horizontal sourcecan be reliably seperated from SH wave in the case of vertical source,the velocity parameters ofboth P wave and S wave are seperately abstracted,then imaging of P wave,SV wave and SH wavecan be realized, and finally reservoir are analpeed through parameters of multiwave. With thisabove advancement difficulties can be overcome that one kind of source can bardly bc used for us toconduct standard multiwave oxploration. It is very important in that it make multiwave explorationcome true very casily, greatly reduce cost and increase cfficiency. Besides, under certaincircumstances this technique can be applied in surface seismic cxploration and the only differenceIies in that characteristies of waves are comparatively not clear and can not be identified casilyin the wave field obtained in the case of surface seismic oxploration.