转换波综合静校正技术在新场地区的应用

APPLICATION OF COMPREHENSIVE STATICS CORRECTION TECHNOLOGY IN XINCHANG AREA

转换波静校正问题一直被认为是转换波处理中较难解决的问题,目前已研究的转换波静校正方法都存在一定的不足。这里根据新场地区转换波资料的特点,采用多种静校正方法相结合的方式,构建了切实可行的转换波综合静校正技术。首先,利用模型法求取转换波长波长静校正量;然后,采用全局寻优静校正方法解决残留的长波长和中长波长转换波静校正问题;最后,在共检波点叠加道集上相关方法计算短波长静校正量。实际数据处理表明,该转换波静校正技术能较好地解决新场地区的转换波静校正问题,使地震记录质量得到明显改善。

The converted wave statics correction problem has always been considered as more difficult to resolve in processing converted wave.At present,the researched converted wave statics correction methods have some deficiencies.Considering the feature of converted wave in XinChang area,a feasible converted wave statics correction technology is constructed by combining many statics correction methods in this paper.Firstly,the long wavelength statics is obtained according to model method.Then,the residual long wavelength and medium long wavelength statics correction problems are resolved by the global optimization statics correction method.Lastly,the cross-correction method is used to calculate short wavelength statics on common receiver stack gathers.The actual processing results indicate the statics correction technology can better resolve the problem of converted-wave statics correction,and the converted wave record quality is improved clearly in XinChang area.