频率自适应子波反褶积在VSP中的应用  

Application of Frequency Adaptive Wavelet Deconvolution in VSP

作　　者：王腾宇[1] 陈豪 张振[1] 汪洋[1] 易浩然 蔡涵鹏 曹川 WANG Tengyu;CHEN Hao;ZHANG Zhen;WANG Yang;YI Haoran;CAI Hanpeng;CAO Chuan(Research Institute of Exploration and Development,Tarim Oilfield Company,PetroChina,Korla 841000,Xinjiang,China;Chengdu Love for Beth Technology Co.,LTD.,Chengdu 611731,China;School of Resources and Enyironment,University of Electronic Science and Technology of China,Chengdu 611731,China)

机构地区：[1]中国石油塔里木油田勘探开发研究院,新疆库尔勒841000 [2]成都爱为贝思科技有限公司,成都611731 [3]电子科技大学资源与环境学院,成都611731

出　　处：《科技和产业》2023年第23期255-262,共8页Science Technology and Industry

摘　　要：子波反褶积在垂直地震剖面(vertical seismic profile,VSP)多次波压制中效果较好,使用最为广泛。但是,该方法忽视了地震子波在地层中的频率衰减,在衰减明显的资料中,对于多次波效果压制不明显。针对该类VSP资料,在子波反褶积的基础之上,选取下行子波作为输入,根据每一道的频率衰减特征选取不同主频的子波作为期望输出,通过求解Toepplitz方程得到反褶积算子,应用至上行波场中。在理论模型和实际数据中,通过与子波反褶积对比,多次波压制效果更明显。Wavelet shaping deconvolution has a good effect in vertical seismic profile(VSP)multi-wave suppression and is the most widely used.But,the method neglects the frequency attenuation of seismic wavelet in the formation,and the suppression effect of multiple waves is not obvious in the data with obvious attenuation.For this kind of VSP data,based on the wavelet shaping deconvolution,the downgoing wavelet is selected as the input,and the wavelet with different main frequency is selected as the expected output according to the frequency attenuation characteristics of each line.By solving the Toepplitz equation,the deconvolution operator is obtained and applied to the upgoing wave field.By comparing with wavelet shaping deconvolution in theoretical model and real data,the effect of multiple wave suppression is more obvious.

关 键 词：多次波 分辨率 反褶积 垂直地震剖面(VSP) 

分 类 号：P631.429[天文地球—地质矿产勘探]