| 1. | In this paper , we present a new migration velocity analysis method - synthetic source record interactive residual migration velocity analysis method based on controlled illumination
摘要提出了一种新的偏移速度分析方法基于控制照明的合成震源记录交互剩余偏移速度分析方法。 |
| 2. | The synthetic source record migration method is tested on mamousi model , 3d seg / eaeg salt model and field datasets . this migration method is proved to be correct , effective and practical
Marmousi模型和三维seg / eaeg盐丘模型及实际海洋和陆地地震资料的试算结果验证了方法的正确性、有效性和实用性。 |
| 3. | In comparison , some actual data are processed by both the conventional method and the new one , indicating that the new method is more effective in improving the consistency of the two kinds of source record than the conventional one
处理结果表明，多点综合串联匹配滤波法比常规的匹配滤波法能更有效地提高2种震源记录的一致性。 |
| 4. | So a new method , the cascade matched filtering processing technique characterized by pre - stack multi points , is proposed , which uses iteration before stack and utilizes stack to improve the stability of the matching operator to realize the consistency of the two kinds of source record
该技术在叠前通过逐步逼近法，并利用叠加手段提高匹配算子的稳定性，实现提高2种震源记录一致性的目的。 |
| 5. | Undulate acquisition surface is one of the main properties of the seismic datasets from western china . based on the synthetic source record migration method and wave stack principle , a method of migrating directly from the undulate surface is presented and tested
结合我国西部地震资料的特点，针对起伏地表情况下的地震数据成像问题，提出了与合成震源记录偏移方法相应的成像方法以及基于共聚焦点技术的基准面向上校正方法。 |
| 6. | The differences between this method and other similar methods are : ( 1 ) the fast synthetic source record algorithm based on the wave theory is adopted in prestack depth migration . ( 2 ) the plane wave source is used in migration that is consistent with the velocity analysis method . ( 3 ) by using the controlled illumination , the distortion of the plane wave source wavefield due to the lateral velocity variation is avoided therefore the error of velocity analysis is reduced and ( 4 ) the practical velocity spectrum makes the interactive migration velocity analysis feasible and convenient
与其他类似偏移速度分析方法的不同点在于： ( 1 )叠前深度偏移采用基于波动理论的快速合成震源记录算法； ( 2 )偏移方法采用平面波震源，与速度分析方法一致； ( 3 )应用控制照明技术，避免了因横向变速而导致的平面波震源波场在传播过程中的畸变，从而减小了速度分析的误差； ( 4 )实用的速度谱设计，使交互偏移速度分析可行且易于操作。 |
| 7. | The synthetic source is the generalization of plane wave source , controlled illumination source , piecewise plane wave source and areal sources with phase encoding etc . by migrating the synthetic source record , the computational cost of the conventional areal shot record migration can be reduced by several times without significantly degrading the image quality
合成震源既包括了已有的平面波震源，也包括了控制照明震源，分段平面波震源和相位编码震源。合成震源记录叠前深度偏移方法是炮记录偏移、平面波偏移、控制照明偏移和相位编码面炮记录偏移方法的推广和统一形式。 |
| 8. | The migration results of the synthetic and ocean field datasets show that this method is correct and effective . several prestack depth migration methods are proposed and unified to the synthetic source record migration method . these methods include plane wave migration with fourier finite difference ( ffd ) extrapolator , maximum energy plane wave migration and prestack migration with phase encoding of areal shot records
通过对本文提出的平面波傅立叶有限差分叠前深度偏移方法、最大能量面炮记录叠前深度偏移方法和相位编码面炮记录叠前深度偏移方法的研究，试算和对比，提出了合成震源三原则，根据这些原则，提出了合成震源概念和合成震源记录叠前深度偏移方法。 |
