基于逆散射级数的自由表面多次波压制方法及其应用  

Free-surface multiple removal based on inverse scattering series and its application

作　　者：杨金龙 蔡杰雄 张广利 YANG Jinlong;CAI Jiexiong;ZHANG Guangli(Sinopec Geophysical Research Institute,Nanjing 211103,China)

机构地区：[1]中石化石油物探技术研究院有限公司,南京211103

出　　处：《物探化探计算技术》2023年第3期344-350,共7页Computing Techniques For Geophysical and Geochemical Exploration

基　　金：国家自然科学基金企业创新发展联合基金(U19B6003)。

摘　　要：由于海平面的存在,海洋勘探中自由表面多次波非常发育且能量强,掩盖了有效信号,严重影响速度的准确拾取及地层成像质量。多次波的压制一直是海洋地震资料处理的重点和难点,也是海洋地震勘探成功的关键因素之一。因此针对自由表面多次波发育特点,这里推导了逆散射级数法自由表面多次波压制方法,并改进了原有的自由表面多次波压制流程,在逆散射级数法预测自由表面多次波前后消除子波的影响,来提高多次波的预测精度,从而降低对自适应相减的依赖,实现多次波的精确压制。模型和实际资料应用效果表明了方法的有效性和适用性。In marine seismic exploration,free-surface multiples are generated strongly and affect the effective signals due to the presence of the sea surface.They have severe effects on the accurate acquisition of velocity and imaging quality.Hence,multiple removal have always been the focus and difficulty of marine seismic data processing and one of the critical factors for successful marine seismic exploration.The inverse scattering series(ISS)free-surface multiple elimination method is proposed and derived according to the characteristics of free-surface multiples.Moreover,the processing flow is modified by removing the source wavelet effect to improve the accuracy of multiple predictions and reduce the dependence on adaptive subtraction.Synthetic and field data tests show the validity and applicability of the ISS free-surface multiple elimination method.

关 键 词：逆散射级数 自由表面多次波 子波 海洋资料 多次波压制 

分 类 号：P631.4[天文地球—地质矿产勘探]