NUMERICAL ANALYSIS OF THE NEAR WELLBORE FLOW MECHANISMS CONTROLLING WELL PRODUCTIVITY

Authors : Bakhbergen BEKBAUOV, Zemfira IMANSAKIPOVA

Pages : 63-74

Doi:10.36222/ejt.468477

View : 16 | Download : 7

Publication Date : 2018-06-30

Article Type : Research Paper

Abstract :This study presents three-dimensional insert ignore into journalissuearticles values(3D);, thermal mathematical model of the simultaneous flow of two-phase immiscible fluids that can be used as a practical tool for the simulation study and analysis of adjacent to wells flow phenomena controlling productivity. Based on the model, the corresponding near wellbore 3D numerical model is developed subsequently, which can be used for conducting analysis of time dependent development and dynamics of the oil-water interface insert ignore into journalissuearticles values(OWI); around the well producing from a bottom-water reservoir. The specialized simulation tool for analyzing near-well flow has been applied to simulate the effects of relative permeability modification insert ignore into journalissuearticles values(RPM); insert ignore into journalissuearticles values(or disproportionate permeability reduction insert ignore into journalissuearticles values(DPR););, well completion insert ignore into journalissuearticles values(single or dual – with the bottom water drainage); and a barrier injected around the well bore on water coning. This study presents a mechanistic study of gel injection process, the effect of gel treatment for in-situ permeability modification on two-phase flow, and posttreatment production forecasts. Model was also applied for simulating production tests with and without artificial impermeable barrier, the effect of DWS technology on water coning performance and some combination of above processes insert ignore into journalissuearticles values(methods);. We propose a generalized version of the LET correlation for relative permeability approximation which takes into account gel – reservoir fluid transition zone. We also propose using a new formula for approximation of Leverett J-function.
Keywords : Disproportionate permeability reduction, Downhole Water Sink, Near wellbore flow, Water shut off