TTI各向异性参数初始建模为层析反演精细建模提供初始模型，初始模型的优劣直接影响层析反演的效率和精度，研究精确的TTI各向异性参数初始建模方法非常必要。基于常规TTI各向异性参数初始建模方法流程，优化了各向异性参数提取公式，引入了局部层析方法，完善了TTI各向异性参数初始建模方法流程，进一步提高了TTI各向异性参数初始模型的精度，与实际地质情况更加吻合，有利于后期的层析反演精细建模。模型试算和实际资料处理结果表明基于局部层析的TTI各向异性参数初始建模方法有效且实用。

The initial modeling method based on TTI anisotropy can provide an initial model for the fine modeling of tomographic inversion, and the quality of the initial model directly affects the efficiency and accuracy of tomographic inversion. It is necessary to study the accurate initial modeling method of TTI anisotropy. Based on the conventional flow of the initial modeling method of TTI anisotropic, in this paper the anisotropic parameter extraction formula was perfected, a local tomography method to optimize the flow of the initial modeling method of TTI anisotropy was introduced, and the accuracy of the initial model was further improved, which is more consistent with the actual geological conditions and conducive to the fine modeling of the later tomographic inversion. The processing results of model and filed data show that the initial modeling method of TTI anisotropy based on local tomography is effective and practical.