摘要
阐述了平面波的特点;分析了Fourier变换下球面波的平面波分解;阐述了炮道集下波场局部分解与成像。通过Marmousi模型的试算结果,验证了该成像方法可提高计算效率。另一方面表明,射线参数的范围和间隔是影响平面波成像质量的主要因素;不同角度入射的平面波对最终成像结果的贡献是不同的。
The characteristics of plane wave are described.Plane wave decomposition of spherical wave under the transformation of Fourier is analyzed.Local decomposition and imaging of plane wave under shot gather are de-scribed.Finally,from the result of pilot calculation of the Marmousi model,we can test that the methods of local plane wave pre-stack depth migration imaging based on the wave equation can improve the computational effi-ciency,the range and spacing of ray parameters are the main factors for plane wave imaging quality,plane wave of different angles of incidence can make different contribution to the final imaging result.
出处
《煤田地质与勘探》
CAS
CSCD
北大核心
2010年第6期62-65,共4页
Coal Geology & Exploration
基金
国家自然科学基金委员会与中国石油化工股份有限公司联合基金资助项目(40739903)
关键词
平面波
平面波分解
环面波
射线参数
叠前深度偏移
plane wave
surface wave decomposition
spherical wave
ray parameter
pre-stack depth migration
