Directional filter aided sub-basalt interpretation: A case study from the Faroe-Shetland basin

作者：Ebrahimi Pouyan; Jaiswal Priyank^*

来源：Journal of Applied Geophysics, 2017, 137: 82-91.

DOI：10.1016/j.jappgeo.2016.12.004

• Post-stack processing
• Seismic interpretation
• Sub-Basalt
• Directional filtering

In complex geological settings, post-stack image processing aids geological interpretation. This case study shows how directional filtering, which is a spatial convolution that focuses energy along a pre-determined direction, can be used for post-stack processing. Application of coherency filtering can improve the mappability of both horizon and fault when applied in the following manner. One or more Region of Interest (ROI) are identified in the stack image and isolated for processing. Within a ROI, the directional filter is applied along the dominant horizon dip. For each ROI the coherency attribute, which provides an image of the discontinuities (e.g. faults), is also generated. The directional filtering is applied to the coherency image along the dominant dip of the faults/fractures. Finally, for each ROI, the filtered coherency image and the filtered stack are co-rendered. The co-rendered image can be merged with the unprocessed stack for a more complete interpretation of the geology. This simple yet intuitive workflow can greatly aid geological interpretation. Here, direction filtering is demonstrated on sub-basalt stratigraphy using a 2D profile from the Faroe-Shetland Basin but the methodology is applicable to any setting.

• 出版日期2017-2