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针对人工源宽角地震测深中炮点与接收点稀疏的特点 ,利用几何散射理论进行壳幔散射体的相似性剖面成像 ,利用互易性原理计算散射体相似性成像的时间条件 ,研究基于宽角反射地震资料重建壳幔反射结构的相似性成图方法 .其中 ,成像点的时间采用快速、高精度的程函方程求解技术 .利用该方法处理东南陆缘区宽角反射剖面实际资料 ,结果表明 ,较之壳幔反射结构的CDP成图技术 ,相似性成图方法具有提高反射同相轴横向连续性的能力 .
Aiming at the sparse characteristics of shot points and receiving points in wide-angle seismic sounding of artificial sources, the similarity profile of crust-mantle scatterers was imaged by using geometric scattering theory. The reciprocity principle was used to calculate the temporal conditions of scatterer-like similarity imaging. The method of reconstructing the similarity of the crust-mantle reflection structure by wide-angle reflection seismic data is that the time of the image point is solved by a rapid and accurate equation solving method.Based on the actual data of the wide-angle reflection profile in the southeast margin, The results show that compared with the CDP mapping technique of the crust and mantle reflection structure, the similarity mapping method has the ability to improve the lateral continuity of reflection events.