Numerical simulation of filtration in a fractured-porous oil-saturated reservoir drilled on overbalance for various types of development

Abstract

Structural features of fractured-porous reservoirs lead to the need to apply dual porosity/permeability models to correctly describe filtration and other processes in such media. The paper presents a model of an oil-saturated fractured-porous reservoir penetrated by overbalance drilling and an example of numerical calculation of the most important parameters. The model is based on the Barenblatt approach, when the systems of fractures and blocks are presented as continuous media connected by fluid exchange. In addition, unlike the known models, it takes into account the influence of deformation processes associated with reservoir development on filtration characteristics. The model allows for various assessments of filtration, flow and other parameters in various well operation modes, such as production or drilling.