转换波组合静校正技术在大庆地区的应用研究

Application study of combined static technology for P-SV wave in Daqing area

P-SV转换波静校正问题是陆地多波勘探的"瓶颈"问题,目前尚未有公认的有效解决方法。针对大庆地区的实际情况,提出了一种转换波组合静校正方法,即将基于三分量微测井资料的模型法和改进型共接收点叠加道集相干法组合在一起进行转换波静校正。模型法较好地解决了转换波长波长静校正问题,改进型共接收点叠加道集相干法解决了转换波中、短波长静校正问题。两种方法的有机结合,较好地解决了该地区转换波静校正问题,消除了因静校正问题造成的假构造现象,增强了同相轴的连续性,提高了转换波地震剖面的品质。

P-SV wave statics is the'bottle neck'in land multi-wave ex- ploration.Till now,there is not an effective method to solve this problem.Aiming at the actual situation in Daqing area,we pro- posed the combined statics method for P-SV wave.The model method based on three-component uphole data was used in combi- nation with the modified common receiving point(CRP)stacking gather coherent method.Of the two methods,the model method can effectively solve statics problem for P-SV wave with long wave- length and the modified CRP stacking gather coherent method can solve the statics problem for P-SV wave with middle and short wavelength.The combination of the two methods can almost solve the statics problem for P-SV wave,remove the pseudo-structure caused by statics,increase the continuity of event,and obtain good seismic profiles of P-SV wave.So,the method can be widely popu- larized at flat area.