NUMERICAL ANALYSIS OF THE NEAR WELLBORE FLOW MECHANISMS CONTROLLING WELL PRODUCTIVITY

Year 2018, , 63 - 74, 30.06.2018

Bakhbergen Bekbauov , Zemfira Imansakıpova

https://doi.org/10.36222/ejt.468477

Abstract

This study
presents three-dimensional (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 (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 (RPM) (or disproportionate
permeability reduction (DPR)), well completion (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 (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

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