Well Test Analysis of Naturally Fractured Vuggy Reservoirs with an Analytical Triple Porosity – Double Permeability Model and a Global Optimization Method

摘要: The aim of this work is to study the automatic characterization Naturally Fractured Vuggy Reservoirs via well test analysis, using a triple porosity-dual permeability model. inter-porosity flow parameters, storativity ratios, as ratio, wellbore storage effect, skin and total will be identified parameters In work, we perform interpretation in Laplace space, numerical algorithms transfer discrete real data given fully dimensional time space. problem space has been posed nonlinear least squares optimization with box constraints linear inequality constraint, which usually solved local Newton type methods trust region. However, one used our called TRON or well-known Levenberg-Marquardt method, are often not able find an optimal solution good fit data. Also analysis porosity-double model, like most inverse problems, can yield multiple solutions match To deal these specific characteristics, use global algorithm Tunneling Method (TM). design algorithm, take into account issues fact that parameter estimation done high precision, presence noise measurements need solve computationally fast. We demonstrate TM study, showed efficient robust alternative characterization, several solutions, very were obtained.