石油物探2017，Vol.56Issue(5)：651-657,7.DOI:10.3969/j.issn.1000-1441.2017.05.005
基于反射波动方程的叠前地震反射数据波阻抗相对变化成像研究
A relative impedance variation imaging of pre-stack seismic reflection data based on reflection wave equation
摘要
Abstract
Impedance of subsurface media is an important parameter for lithologic processing and interpretation of seismic data.In this paper,a relative impedance variation imaging in depth domain based on the reflection wave equation is proposed.Starting from the variable density acoustic wave equation,the proposed method derives a linear propagation equation of the primary reflection waves based on the relative impedance variation through high frequency approximation.Then,on the basis of the linear propagation equation,it derives the relative impedance variation imaging method and its formula by using the linear inversion theory.The rela tive impedance variation imaging results obtained by the proposed method are deficient in fidelity and resolution,owing to the limitation of the frequency band of the reflected seismic data and to the inherent limitations of the imaging methods,which are approximate solutions to the waveform linear inversion problem.However,the computational complexity is equivalent to that of reverse time migration.The result of the model tests on synthetic data showed the effectiveness of the proposed method.关键词
叠前地震反射数据/高频近似/反射波动方程/线性反演/波阻抗相对变化/成像Key words
pre-stack seismic reflection data/high frequency approximation/reflection wave equation/linear inversion/relative impedance variations/imaging分类
天文与地球科学引用本文复制引用
陈生昌,周华敏..基于反射波动方程的叠前地震反射数据波阻抗相对变化成像研究[J].石油物探,2017,56(5):651-657,7.基金项目
国家自然科学基金项目(41074133,41374001)、国家科技重大专项(2016ZX05033002)共同资助.This research is financially supported by the National Natural Science Foundation of China (Grant Nos.41074133,41374001) and National Science and Technology Major Project of China (Grant No.2016ZX05033002). （41074133,41374001）
