转换波的静校正

STATICS OF CONVERTED WAVE

横向不均匀风化层和甚低速剪切波使得P-SV转换波静校正量大且横向变化剧烈。这种大的静校正量不可能通过常规的P波折射静校正得到消除。采用模型相关和曲线圆滑消除接收点静校正量。其步骤为:(1)利用优化共接收点叠加道确定总的接收点静校正量;(2)利用圆滑的方法得到对构造起伏的估计;(3)总的接收点静校正量减去构造起伏便得到了接收点的静校正量。

Laterally-nonuniform weathered layer and very low velocity of shear waves cause high statics and severe lateral variation of converted P-SV wavesGenerally,such high static can not be removed through conventional P-wave refraction static methods The technique described in this paper shows that receiver statics can be removed by modeling correlation and curve smoothing method The procedures include:(1) determining the total receiver statics using the value derived from the correlation of optimized common receiving point stack traces; (2)evaluating the value of structural dip using curve smoothing;(3)getting receiver statics by subtracting static values of structural dip from total static valuesThis method can be applied to removal of high static of converted P-SV waves.