品质因子Q估算方法研究

Reviews on estimation methods of Q factors

对地层吸收结构进行观测和估算,并消除地层吸收对地震数据分辨率的影响,是近年来高分辨率地震勘探的重要尝试。地层吸收常用品质因子Q进行定量描述。基于前人研究成果,综述了历年的Q值估算方法,重点对比了几种常用的Q值反演算法,指出每种方法的适用条件及局限性,之后开展了基于射线理论的Q值层析反演算法研究,且利用模型和实际资料验证方法的准确性,最后总结了Q值估算的发展趋势。

Eliminating absorption and attenuation effect on seismic resolution via accurate near surface Q factor model is an important trial for high resolution seismic exploration in recent years.Quality factor Q is commonly used in quantitative description for seismic absorption.Based on the achievements in the past,we reviewed the development of Q inverse methods in this paper,contrasted several commonly used methods,pointed out the applicable conditions and limitations of each method.In addition,ray-tracing Q tomography method as well as its principle was introduced.Also,synthetic and field data are tested using Q tomography.Finally the development tendency of Q estimation was summarized.