地震分辨率对速度计算精度的影响  

Impact of Seismic Resolution on Accuracy of Velocity Calculation

作　　者：朱广生[1] 刘鹏[1] 潘正中[2] 管文胜[2] 

机构地区：[1]江汉石油学院,湖北荆州434102 [2]塔里木油田分公司,新疆库尔勒841000

出　　处：《河南石油》2001年第3期7-9,共3页Henan Petroleum

摘　　要：因地震分辨率的限制，根据速度谱计算出的层速度实质上是层间均方根速度，由此计算出的平均速度大于其实际值，同时也大于VSP平均速度。地震分辨率越低，速度谱计算出的平均速度误差越大。速度谱解释时漏读迭加速度同样会使平均速度计算值偏高，误差增大。文中指出，提高地震分辨率是提高速度谱计算速度精度的基础，研制高分辨速度谱，对速度谱计算出的层速度进行适当校正，细心解释速度谱，可提高速度计算精度。layer velocity calculated with velocity spectrum is in fact intrabed root－mean－square velocity due to the restriction of seismic resolution．Thus the average velocity computed based on these results is larger than its actual value and is higher than VSP average velocity． The lower the seismic resolution is the higher the error of the average velocity derived from velocity spectrum． Omission of stacking velocity during interpretation of velocity spectrum can also result in a higher average velocity． Enhancing seismic resolutios is the base for improving the calculation accuracy of velocity． Utilization of velocity and careful interpretation of velocity spectrum are the ways to improve velocity calculation accuracy．

关 键 词：地震分辨率 层速度 精度 均方根速度 速度谱 VSP 

分 类 号：P631.443[天文地球—地质矿产勘探]