石油物探2017，Vol.56Issue(1)：38-49,12.DOI:10.3969/j.issn.1000-1441.2017.01.005
特征波反演成像理论框架
The theoretical framework of characteristic wave inversion imaging
摘要
Abstract
The core of seismic wave inversion imaging is to translate solving a strong nonlinear inverse problem to a further convex inverse problem.The reason of strong nonlinearity in inverse problem lies in the far from linear relation between the real data and the model parameters and the forward problem cannot accurately predict the full wave field.Therefore,we put forward the theoretical framework of characteristic wave inversion (CWI).Its basic idea is not to seek predicting the whole wave phenomena in the real data,but to aspire for interpreting characteristic wave field.Comparing with the full waveform inversion (FWI),CWI is consisted of four basic steps:characteristic wave field (CWF) extracting;wave equation based transmitted wave tomography;wave equation based reflection wave tomography;least square prestack depth migration.CWI is an inversion-imaging framework based on the characteristic wave phenomena in the real data.CWF extraction is the key step,which has three levels meaning:decomposing of the wave phenomena (such as vector wave filed is decomposed into scalar wave field,primaries and multiples are decomposed);decomposing of the temporally and spatially local,single seismic phase,directional and bandlimited wave field from real data;decomposing of the wavelet on the events into the travletime,phase and something else.The compressive sensing method is used in CWF extractior.Wave equation based transmitted wave tomography is based on the first arrival and early arrival traveltime.The inversion imaging based on the disturbance wave field firstly deal with the reflection wave from the layered strata,and then the scattered wave and diffracted wave.The background velocity estimation in the data domain mainly depends on the traveltime and phase,and the effect of the amplitude of the wavelet on the traveltime and phase measuring is removed as possible.The traveltime or phase information can be only used in the background velocity estimation in the imaging domain;it is not suitable for using the amplitude information.For the parameter disturbance estimation,the azimuth/opening-angle reflectivity estimation should be firstly implemented,and then the scattering strength is estimated.Characteristic Wave Inversion Imaging is a realistic procedure to push the classical FWI into the practical application.The numerical experimentation proves the statements.关键词
反演成像/特征波场/非线性问题/凸问题/数据域反演/像域反演Key words
inversion imaging/characteristic wave field/characteristic wave inversion/nonlinear problem/convex problem/data domain inversion/imaging domain inversion分类
天文与地球科学引用本文复制引用
王华忠,冯波,王雄文,胡江涛,刘少勇,李辉,周阳..特征波反演成像理论框架[J].石油物探,2017,56(1):38-49,12.基金项目
国家自然科学基金项目(41374117)和国家油气重大专项(2011ZX05005-005-008HZ,2011ZX05006-002,2011ZX05023)联合资助.This research is financially supported by the National Natural Science Foundation of China (Grant No.41374117) and the National Science and Technology Major Project of China (Grant Nos.2011ZX05005-005-008 HZ,2011ZX05006-002,2011ZX05023). （41374117）
