曲率属性近年来在地震资料解释上得到了迅速的发展和应用,而曲率属性的计算通常使用3×3网格单元对二次曲面进行拟合,由Roberts推导并给出了具体的计算公式.本文以Roberts推导的思路为基础,应用中心差分方法计算空间导数,引入微分算子的形式来表示,并且在3×3网格拟合的基础上,推导了5×5网格单元对二次曲面进行拟合得到的各种曲率属性的计算公式,并对3×3网格、5×5网格求取曲率的结果进行了对比分析.结果表明,5×5网格拟合结果在断层和构造特征的识别方面有着良好的实际结果. In recent years, curvature attributes have been rapidly developed and applied to seismic data interpretation. However, the calculation of curvature attributes usually uses 3 × 3 grid elements to fit the quadric surface. Derived by Roberts and given a specific formula. Based on the idea derived by Roberts, this paper uses the central difference method to calculate the spatial derivatives and introduces the derivative of the differential operators. Based on the 3 × 3 grid fitting, And the curvature of the 3 × 3 grid and the 5 × 5 grid are compared and analyzed.The results show that the fitting result of 5 × 5 grid is the best in the fault And the identification of structural features have had good practical results.