VSP资料矢量波场分离方法

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英文篇名：VSP vector wavefield separation 作者：李飞 ; 梁向豪 ; 王雪峰 ; 龚艳平 ; 张新东 英文作者：LI Fei;LIANG Xianghao;WANG Xuefeng;GONG Yanping;ZHANG Xindong;New Resources Geophysical Exploration Division,BGP Inc.,CNPC;Tarim Oilfield Company,PetroChina; 关键词：VSP ; 矢量波场分离 ; 参数约束 英文关键词：vertical seismic profile(VSP);;vector wavefield separation;;parameter constraint 中文刊名：SYDQ 英文刊名：Oil Geophysical Prospecting 机构：东方地球物理公司新兴物探开发处;中国石油塔里木油田公司; 出版日期：2018-12-30 出版单位：石油地球物理勘探 年：2018 期：v.53 基金：国家科技重大专项“随钻地震波震源研制与数据处理解释软件开发”(2016ZX05020-005)资助 语种：中文; 页：SYDQ2018S2011 页数：6 CN：S2 ISSN：13-1095/TE 分类号：9+85-89

摘要

为了提高VSP矢量波场分离时参数反演的效率、增强方法对实际资料的适用性,在零井源距层状速度模型基础上,通过射线追踪正演计算不同波场的射线参数,约束不同深度下行、上行波场的入射角和视慢度参数,使反演快速收敛,反演过程更加稳定,有效提高了反演的效率,同时也避免了反演参数局部极值引起的频率混叠现象。
        In order to improve the efficiency of parameter inversion during VSP wavefield separation,the horizontal layered velocity model is established based on zero-offset VSP data.Then the ray parameters of different wavefields are calculated with forward ray tracing.These parameters are used to constrain the incident angle and the apparent slowness parameter of the downgoing and upgoing wavefields at different depths.This method makes the inversion converge quicker,and makes the inversion process more stable and effective,and avoids the frequency aliasing caused by local extreme values of inversion parameters.

引文

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