Modelagem de conectividade de fraturas em aquíferos fissurais

Abstract

The geology of the Brazilian Northeast Region is marked by crystalline bedrock. Aquifers found in this kind of formation are characterized by discontinuous forms of storativity. In them, water is stored and flows through fractures present in the rock. However, the way it has to flow physical links exist between the fractures. Existing connections, fractures act as conduits that carry water from the reservoir to the wells drilled in training. This work used the software MeioFr.exe developed by José Sérgio dos Santos based on the model of Pitombeira (1994) to simulate the flow of groundwater in fractured media to analyze what the most important factors causing the existence of these connections and influence on the transmissivity of a fractured area. The results indicated that the frequency, length and orientation of fractures, influence the connectivity of the medium. Systems with high frequency of fractures exhibit better connectivity to systems with few fractures. Systems with long fractures are better connected to systems with short and fracture systems with large standard deviation in the orientation of fractures that have better connectivity systems parallel fractures. It was found that systems with greater openness have better transmissivity.