地震资料解释中的边缘检测方法应用比较

Application and Comparison of Edge Detection Methods in Seismic Interpretation

地震勘探是工程物探中一种重要的勘探方法,做好地震解释对于工程物探结果的分析十分重要。边缘检测能够更直观地反映地震剖面地层的边缘,对于提高地震资料解释效果显著。某工程物探项目要求探明该区域覆土层厚度及地层边界,不同地层波阻抗利用不同的原理进行反射波处理成图显示地层边界的效果不够明显。就边缘检测的6种常用方法,即Roberts算子、Sobel算子、Prewitt算子、Laplace算子、LOG算子和Canny算子,在该工程物探地震剖面识别层界面的解释效果进行了比较。结果表明,在本项目中,采用canny算子进行边缘检测效果最好,适用于其他类型的地震剖面边缘检测效果有待进一步实验。

Seismic exploration is one of the most important exploration methods in engineer- ing geophysical prospecting, and it is very important to make good seismic interpretation for the analysis of engineering geophysical exploration results. Edge detection can reflect the edge of the seismic profile strata more directly, which has a significant effect on impro- ving the seismic data interpretation. A project requires that the thickness of overburden and the boundary of the stratigraphy should be ascertained in this area, and the effect of usingreflection wave processing based on different wave impedance of different stratigraphy to show the stratigraphic boundary is not obvious. In this paper, six methods of edge detection namely Roberts operator, Sobel operator, Prewitt operator, Laplace operator, LOG operator and Canny operator are compared in the geophysical and seismic profile recognition layer, and the results show that the best edge detection for this project is canny operator, and the effect of edge detection for other types of seismic profile needs further experiments.