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Naturally Fractured Zone Identification – A Multi Attribute Deepwater Gulf of Mexico ExampleNormal access

Authors: H. Andrade, P. Bt-Mokhta and A. B-Zulkifli
Event name: Second EAGE Workshop on Deepwater Exploration in Mexico: Knowledge transfer and collaboration from shelf to deepwater
Session: Subsurface Session Part II
Publication date: 26 April 2019
DOI: 10.3997/2214-4609.201900357
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 67.28Kb )
Price: € 20

Summary:
This presentation will demonstrate a multi-attribute workflow which includes volumetric curvature parameter optimization, directional GLCM (gray-level co-occurrence matrix) based attributes, and post processing enhancement with 3D Log-Gabor filtering. Comparison between volumetric curvature and texture classification based on GLCM is carried out in order to get an estimation of fracture corridor orientations. An array of sectors response from GLCM-based attributes can be calculated in different directions by inspecting and comparing these different sectors. Areas with clear tendency to directional variations might be associated with fractured zones, changes in lithology, or seismic facies changes. Based on these analyzes it was possible to identify highly fractured zones congruous with the geological model. The main trend shows parallelism with the main faults and a secondary is interpreted as a direct expression of the salt influence. These observations are consistent with modeled anticline generated by salt tectonics and limited by main sealing faults


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