Constraining fracture distribution in an atoll-like carbonate platform - Results from field observations and 3D geomec

It is known that the presence of fractures in carbonate reservoirs will have significant impact on the fluid flow. Depending on their properties, fractures could act either as a conduit or as a barrier, therefore understanding their distribution throughout reservoir is really important. In this study we present our results on fracture analysis affecting the Latemar carbonate platform. The newly developed fracture acquisition method, equipped with GIS application, has been applied in the field to acquire full description of outcrops. Through statistical analysis, fractures are then characterized from various domain and structural setting to observe the controlling factors. The numerical modelling approach has been incorporated into this study. Guided by hi-res Lidar images interpretations, the 3D geological model of Latemar is produced to constrain the geometry of different domains for the mechanical modelling. Through finite element method, several loading scenarios have been applied to the 3D model, to observe the distribution of the deformation, i.e. fracturing. The results from numerical modelling and field observation will provide better insight to predict fracture distribution in subsurface reservoirs.