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中文摘要：
品质因子Q值是描述介质黏性大小最重要的物理量，准确获取地下介质Q值分布，是黏性介质叠前属性反演、地震波正演模拟及黏性介质偏移成像的基础。为此，基于迭代反演思想，将地下介质的黏滞性引入最小二乘框架中，对品质因子Q值进行线性反演，形成了一种基于多次迭代策略的Q值反演方法；通过简单Q模型、二维盐丘Q模型试算，验证了方法的正确性及适应性。研究结果表明，利用最小二乘迭代反演方法不仅可以得到地下Q值扰动界面，而且可以得到Q绝对值分布。
英文摘要：
The quality factor （Q）, an important physical parameter of the viscous media, is the basis of the pre-stack attributes inversion, seismic forward modeling and seismic image for the viscous media. In this paper, we introduce the viscosity into the least-squares framework based on the iterative strategy and implement an iterative method to calculate Q by linear inversion. Numerical tests on synthetic data suggest that the proposed method is correct with good validity and high accuracy. In addi- tion, the proposed least-squares iterative inversion method can not only get the interface of Q perturbation but also the distri- bution of absolute Q value which are both very important to describe the attenuation attribution of the media.
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