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根据井下透射波旅行时数据获取的速度层析图的精度对旅行时静校正值极为敏感。本文提出一种包括旅行时静校正项的最小平方层析算法。该算法可同时求取速度场和旅行时静校正值,这就使我们能将旅行时信号与噪声区分开,以减少静校正引起的人为层析速度误差。通过在速度场谱分量较差处加入先验约束条件,可压制覆盖不均匀引起的速度人为误差,从
The precision of the velocity tomogram acquired from the traveling data of the downhole transmitted wave is extremely sensitive to the static correction value when traveling. In this paper, we propose a least squares algorithm that includes statics of travel. This algorithm can calculate the velocity field and travel time statics at the same time, which makes it possible to distinguish the travel time signal from the noise and to reduce the error of artificial tomography caused by static correction. By adding a priori constraints to the poorer spectral components of the velocity field, man-made errors in velocities caused by uneven coverage can be suppressed. From