CAJ | 학술논문

阳霞工区位于南天山前缘斜坡，地表条件复杂，处理后的地震数据信噪比低，难以可靠解释层位，影响常规方法建立初始深度-速度模型准确性。利用约束速度反演(Constrained Velocity Inversion简称CVI)建立层速度模型，将其由时间域通过比例法转换到深度域建立初始深度-速度模型，得到的速度模型包含一定的地质属性，在此基础上迭代修正深度-速度模型，并进行叠前深度偏移以提高其精度和效率。
양하공구위우남천산전연사파，지표조건복잡，처리후적지진수거신조비저，난이가고해석층위，영향상규방법건립초시심도-속도모형준학성。이용약속속도반연(Constrained Velocity Inversion간칭CVI)건립층속도모형，장기유시간역통과비례법전환도심도역건립초시심도-속도모형，득도적속도모형포함일정적지질속성，재차기출상질대수정심도-속도모형，병진행첩전심도편이이제고기정도화효솔。
Yang Xia area is in the south of Tian Shan foreslope of which the surface condition is very complex.With var-ious of interference waves,the signal to noise ratio of seismic data processed is very low,so it is hard to interpret hori-zon reliably. It’s difficult to establish accurate depth interval velocity model by convenient methods. This paper has pre-sented using Constrained Velocity Inversion (CVI) to build the interval velocity model which is transformed from time domain to depth domain with scaling method to establish the initial depth interval velocity model that keeps some geo-logical attributes,and refining the depth interval velocity model iteratively for pre-stack depth migration,which enhanc-es the accuracy and efficiency of pre-stack depth migration.