Journal
APPLIED GEOPHYSICS
Volume 12, Issue 3, Pages 334-342Publisher
SPRINGER
DOI: 10.1007/s11770-015-0512-2
Keywords
Salt dome; seismic interpretation; 3D edge detection; 3D Sobel; multidirectional edge detector
Categories
Funding
- Center for Energy and Geo Processing (CeGP) at King Fahd University of Petroleum & Minerals (KFUPM) [GTEC 1401-1402]
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Accurate salt dome detection from 3D seismic data is crucial to different seismic data analysis applications. We present a new edge based approach for salt dome detection in migrated 3D seismic data. The proposed algorithm overcomes the drawbacks of existing edge-based techniques which only consider edges in the x (crossline) and y (inline) directions in 2D data and the x (crossline), y (inline), and z (time) directions in 3D data. The algorithm works by combining 3D gradient maps computed along diagonal directions and those computed in x, y, and z directions to accurately detect the boundaries of salt regions. The combination of x, y, and z directions and diagonal edges ensures that the proposed algorithm works well even if the dips along the salt boundary are represented only by weak reflectors. Contrary to other edge and texture based salt dome detection techniques, the proposed algorithm is independent of the amplitude variations in seismic data. We tested the proposed algorithm on the publicly available Netherlands offshore F3 block. The results suggest that the proposed algorithm can detect salt bodies with high accuracy than existing gradient based and texture-based techniques when used separately. More importantly, the proposed approach is shown to be computationally efficient allowing for real time implementation and deployment.
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