Numerical Modelling for the Optimum Design of HorizontalWell Completions with PSCs in Water Drive Reservoirs

摘要

The problem of water coning is a key factor in the development of horizontal wells in water drive reservoirs, and the autonomous phase selection controller (PSC) is a new water control tool for controlling bottom water coning. A PSC is based only on the fluid properties and flow paths to distinguish fluids and limit water production without any moving parts. This paper discusses the problem of water coning and offers a potential solution for horizontal wells completed with PSCs. A 3D dynamic simulation model of two-phase flow for a horizontal well with a PSC completion has been developed and solved by coupling the reservoir heterogeneity, anisotropy, drilling damage, well trajectory, tubing flow and annular flow. The simulation results indicate that horizontal wells with PSC completions can experience improved production performances compared to those of open hole completions. In addition, a large number of sensitivity analyses have also been performed, including the number of PSCs, packers and different locations of the PSCs. Finally, an optimization design methodology of a PSC completion in a horizontal well has been proposed.