Fractures have been known to exist in reservoirs for the last half century, yet the practice of characterizing fractured rock reservoir system has been extremely slow. Why is this so? The greatest contributor to this point of view is that fractured reservoirs are extremely complex. The complexity is attributed to vast number of both dependant and independent geometrical variables that dictates final reservoir response.
Fracture characterization is essential step to understand the overall reservoir performance, and to accomplish this, it is imperative to integrate all facets of information to achieve optimization of permeability response. A basic physics-understanding is absent of the fracture morphology that commonly occur in naturally fractured-reservoirs (NFR). This knowledge will help understand flow and recovery patterns in fractured reservoirs. For example, fracture-population and fracture-spacing, fracture area (length & width), fracture opening (fracture-porosity), and fracture-orientation. The model will simulate several scenarios of hypothetical fracture geometries in pursue of overall reservoir permeability. Anyone who has dealt with natural fractured reservoirs will realize that these variables are few of other numerous variables that when combined properly would have a better prediction for the reservoir overall performance.
Systematic fractured reservoir physical-models are proposed for this study. It is known that almost all fractured reservoirs respond in a unique way according to the class of their fracture. Therefore, the principal objective of the study is to construct a physical model of an artificial permeable reservoir that will host many sets of controlled fracture geometry and morphology. These fractures will be designed and tested. Further these fractures will be studied and modeled in order to seek fundamental knowledge of their impact on total reservoir performance.