Apparent flow-dimension approach to the study of heterogeneous fracture network systems

The generalized radial flow (GRF) model in well-test analysis employs noninteger dimensions to represent the variation area with respect distance from a borehole. However, dimension is influenced not only by changes area, but also permeability variations medium. In this report, combined effect of dimensionality and permeability/conductance interpreted referred as apparent (AFD). AFD determined using second derivative drawdown-time plot pressure transient testing, which may have varied values time. A systematic set investigations presented, starting idealized channel networks one, two three (1D, 2D 3D, respectively), proceeding case study complex fracture network based on actual field data. Interestingly, general relation between upsurge/dip conductance contrast adjacent channels established. derived calculations for 1D shown be useful even data interpretation more 3D cases. an application at real site, presence clusters identified plot. Overall, tool detecting conductance/dimensionality system, serve one different types that can jointly analysed characterizing heterogeneous system.