Abstract：Fold distribution,offset distribution and azimuth distribution in a bin have direct effects on geometry attributes in 3D seismic survey design.If two adjacent bins have the same fold but different offsets,this non-uniform offset distribution brings some stack amplitude diversity in the adjacent bins.At present,3D geometry attribute uniformity of the most analytical methods is expressed by qualitative analysis chart.We introduce in this paper a uniformity quantitative analysis method for offset distribution by average value,square deviation and weighting factor.The paper analyses effects on offset distribution uniformity of different 3D geometry parameters by the proposed uniformity quantitative analysis method.Furthermore,the paper analyses effects on seismic stack amplitude or frequency uniformity of different 3D geometry parameters by the seismic wave modeling.The results show that offset distribution uniformity is in good agreement with seismic stack amplitude or frequency uniformity.Therefore this improved method can be considered as a useful tool for analyzing and evaluating 3D geometry attribute uniformity.
