速度场平滑的协克里格法及应用
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摘要
建立地震速度场的数据，主要来源于速度谱，速度的影响因素较复杂，并且由速度谱数据过渡到地层的层速度与平均速度的各种方法都存在一定的局限性，在速度数据体中异常数据较多。协克里格法在分析数据时，同时考虑了网格内数据点距离和方向的影响，能较好压制速度场中的异常数据，提高速度场数据的精度。应用该方法对某盆地Y构造带T6层平均速度数据进行处理，效果十分显著。
Data used to establish velocity field mainly come from velocity spectrum.Influencing factors of velocity are complicated, and all the methods used to acquire interval velocity from velocity spectrum have certain limitations,so there exist many abnormal data in velocity data set.When analyzing data with colocated Kriging method, both distance influcence and direction infiucence of data points in grids can be taken into account, therefor random velocity errors in velocity field can be removed and accuracy of velocity data can be improved.This method was applied to process the average velocity data of layer T6 in one basin,and very good results have been achieved.
Data used to establish velocity field mainly come from velocity spectrum.Influencing factors of velocity are complicated, and all the methods used to acquire interval velocity from velocity spectrum have certain limitations,so there exist many abnormal data in velocity data set.When analyzing data with colocated Kriging method, both distance influcence and direction infiucence of data points in grids can be taken into account, therefor random velocity errors in velocity field can be removed and accuracy of velocity data can be improved.This method was applied to process the average velocity data of layer T6 in one basin,and very good results have been achieved.
引文
1张启锐.地质趋势面分析.北京:北京科学出版社,1990:139～142
2刘秀珍,孙雪洁,高福.用趋势面分析方法探讨YG气田天然气成藏控制因素及气藏类型.石油物探,1996,35(4):77～88
3桂志先,朱广生,陈遵德等.地震速度场的趋势面分析及应用.江汉石油学院学报,1997,19(3):46～50
2刘秀珍,孙雪洁,高福.用趋势面分析方法探讨YG气田天然气成藏控制因素及气藏类型.石油物探,1996,35(4):77～88
3桂志先,朱广生,陈遵德等.地震速度场的趋势面分析及应用.江汉石油学院学报,1997,19(3):46～50
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