摘要
速度分析是地震资料处理的重要环节,制作准确的速度谱,可为动校正提供可靠的速度资料,并最终决定叠加资料的质量.本文在对速度分析的基本估算方法和应用要素做系统的概括总结后,对面元细分与速度分析关系进行了详细的理论研究和实际资料的检验.理论模型数据和胜利油田永新工区高密度实际资料处理表明,面元细分对速度谱的主要影响是覆盖次数,覆盖次数较低时,要准确获知速度较难;覆盖次数增大,速度谱变好,但其精变并不按覆盖次数线性增大.要实现高密度资料分辨率品质的提高,必须提高检波器接收精度.
Velocity analysis is an important procedure in seismic data processing. We can obtain accurate stack velocity using velocity analysis program to provide reliable velocity parameters for NMO, which ultimately determine the quality of stack sections. Based on the summary of recent velocity analysis methods and applying factors, we analyze the basic principle of velocity analysis and conduct test using synthetic and Yongxin high-density data of Shengli Oilfield to research the relation between bin-subdivision and velocity analysis. The results show that the most important effect of bin-divisible on velocity analysis is fold number. When the fold number is small, it is difficult to gain accurate velocity. While it is large, the velocity analysis results are better. However, the accuracy isn＇t linearly improved with fold numbers. In order to improve the resolution of high-density data, we should improve the receiving ability of geophones.
出处
《地球物理学进展》
CSCD
北大核心
2009年第6期2079-2086,共8页
Progress in Geophysics
