Study on Filling Characteristics and Mechanism of Structural Fractures in Underground Reservoir

Through core CT analysis and cyclic reaction simulation experiment, the filling characteristics of structural fractures are analyzed, mechanism is revealed in this paper. The results show that fracture degree has obvious inverse correlation with length, maximum opening, absolute linear density, inclination fractures, which indicates poor connectivity more likely to be filled. Within networks, mineral controlled by flow speed overflow. When fluid from deep underground flows through system connectivity, its velocity relatively slow, environment stable, leads components saturated solution easier precipitate deposit fractures. very overflow low, will reduced accordingly. research have guiding significance for prediction permeability distribution.