Fractured reservoirs are more complicated than matrix reservoirs and they do require to be evaluated correctly. Information on the accurate characterization of fault zones and on the way in which faults and fractures affect fluid flow are needed. In this study, a 3D multi component and multi directional deterministic operator is designed and developed to detect sub-seismic faults from seismic data that converge at a point, to map conduits in naturally fractured reservoirs. This operator is cubic and composed of nine symmetrical two dimensional plane templates. They are designed to search all possible directions and angles, to detect and match any two sub-seismic faults that meet at its center. It covers seventy two detection directions, and angles range from 22.5° to 157.5°. Three binary decisions are performed with each of the nine symmetrical planes. the first is for detecting a sub seismic fault at a point, the second is for evaluating a linear arrangement of these points and the third is to verify if two linear arrangements exist on the same plane.
The case study is presenting conduits maps to demonstrate the behavior of three different sub-seismic fault size ranges. The conduits intensities vary within and for each formation. They are minimal to absent in reservoirs top seal. This technique detects only small scaled faults. It can't detect primary sedimentary structures and random noises. It provides an output related to the variation of dual porosity and permeability and can be considered a supporting input for more realistic reservoir simulation. This technique helps determine the effect of natural fractures in the reservoirs as early as possible so that the evaluations and planning can be done correctly from day one. It is a reliable tool for reservoir top seal fracturing evaluation, sweet spots in fractured reservoirs delineation and potential compartments identification.