多波多分量地震勘探在松辽盆地的初步应用

根据松辽盆地陆相薄互层岩性勘探所遇到的困难，近年来在油田上开展了多波多分量地震勘探试验，探讨了一套多波多分量地震资料采集，处理和解释方法。采集时考虑纵，横波入射临界角，求出最大，最小炮检距，决定野外观测系统；处理时，采用τ－ｐ域各向异性介质的平面波理论与波的偏振投影，实现Ｐ波，ＳＶ波分离，对转换波（ＳＶ）处理考虑到射线路径的不对称性，故用共转换点（ＣＣＰ）道集求其时距曲线，从而得到最终转换波叠加剖

The preliminary application of multiwave and multicomponent seismic explorations in Songliao basin

In recent years, multiwave and multicomponent seismic explorations have beentested in oil fields to counter the difficulties encounted in continental--factes thin interbedding exploration of Songliao basin. A series of methods for data acquisition,prooes.ing and interpretation of multiwave and multicomponent seismic explorations have been probed successfully. In consideration of incident critical angles ofP-- and S--waves, maximum and minimum offsets are derived to determine the fieldobservation system. In data processing, plane--wave theory and wave polarizationprojection in r--p domain and anisotropic medium are used to separate p--wave fromSV--wave F due to non--symmetry of its raypath, the time--distance curve of converted--SV wave is derived from common conversion--point trace gathers, thus obtainingthe final stack section of converted wave. In interpretation, the waveform shouldbe correctly identified and horizon marked, then various physical parameters will beestimated precisely. Better results have been obtained in reservoir prediction, physical parameter interpretation and hydrocarbon detection.