利用结构导向平滑方法解释断层

发布时间：2018-04-27 15:46

本文选题：断层解释 + 结构导向平滑　；参考：《石油地球物理勘探》2017年01期

【摘要】：在深层地震资料解释过程中,受资料品质的限制,断层解释难度较大。为此,研究了对叠后地震资料进行处理的基于梯度结构张量的结构导向平滑方法,该方法能有效改善地震资料的品质,进而辅助断层解释。具体流程为:1利用原始地震数据求取每个采样点在空间(或时间)方向的导数,并求取梯度结构张量矩阵;2通过特征分解求取梯度结构张量矩阵的特征向量,并构建扩散张量矩阵;3将扩散张量矩阵代入改进的偏微分扩散方程,采用共轭梯度迭代法求解该方程,求得的解即为平滑后的图像。实际资料处理结果表明:经结构导向平滑方法处理后的地震资料信噪比有较大提高,剖面上的断点更清晰,断层的空间组合关系更明确,解释结果的可靠性更高。
[Abstract]:In the process of deep seismic data interpretation, fault interpretation is difficult due to the limitation of data quality. For this reason, the structure orientation smoothing method based on gradient structure Zhang Liang for post-stack seismic data processing is studied. This method can effectively improve the quality of seismic data and assist in fault interpretation. The flow chart is that the derivative of each sampling point in space (or time) direction is obtained by using the original seismic data, and the eigenvector of the gradient structure Zhang Liang matrix is obtained by eigendecomposition of Zhang Liang matrix with gradient structure. The diffusive Zhang Liang matrix 3 is constructed to replace the diffusive Zhang Liang matrix with the modified partial differential diffusion equation, and the conjugate gradient iterative method is used to solve the equation. The obtained solution is a smooth image. The actual data processing results show that the signal-to-noise ratio of seismic data processed by structure-oriented smoothing method is greatly improved, the fracture points on the section are clearer, the spatial combination relationship of faults is clearer, and the reliability of the interpretation results is higher.
【作者单位】：中海石油(中国)有限公司深圳分公司;
【分类号】：P631.44

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