Simulation study of areal sweep efficiency versus a function of mobility ratio and aspect ratio for staggered line-drive waterflood pattern

摘要

Pattern geometry plays a major role in determining oil recovery during waterfloodingand enhanced oil recovery operations. Although simulation is an important tool fordesign and evaluation, the first step often involves rough calculations based upon arealsweep efficiencies of displacements in homogeneous, two-dimensional, scaled, physicalmodels. These results are available as a function of the displacement pattern and themobility ratio M.In this research I studied the effect of mobility ratios on five-spot and staggeredwaterflood patterns behavior for areal (2D) displacement in a reservoir that ishomogeneous and isotropic containing no initial gas saturation. Simulation wasperformed using Eclipse 100 simulator.Simulation results are presented as graphs of areal sweep efficiency at breakthroughversus Craig mobility ratio for various staggered line drive aspect ratios.The main results of the study are presented in the form of a graph of areal sweepefficiency at breakthrough as a function of staggered line drive aspect ratio. This shouldenable engineers to utilize the results in a convenient manner.