High And Low Molecular Weight HPAM Polymer Flooding

The effects of polymer flooding vary and we cannot precisely describe the influence of reservoir geological conditions over polymer flooding effects.The purpose of the experiment was to investigate the effect on recovery,and water cut levels for a range of reservoir permeabilities in unconsolidated sand reservoirs.Experimental data are presented and simulated graphs using computer management group CMG.However,similar important findings were made: some of the data indicated that the applied polymer resulted in added recovery when displacing oil from high permeable layers in comparison with low permeability layers.Reservoirs are heterogeneous formations with multi-layers.Reservoir geological conditions are important influencing factors for polymer flooding effects.Recoverable reserves continue to decline,new discoveries with low permeabilities,low thickness,poor continuity,and the industry looks to methods to effectively increase the recovery of to meet economic demand.Polymers are mixed with soluble water and form polymer solution.The purpose of adding polymers in water is to increase the apparent viscosity of water(displacing fluid)which helps to lower the mobility ratio.This condition maximizes oil-recovery sweep efficiency,creating a smooth flood front with less viscous fingering.Many studies and implementations of polymer flooding in fields have been done with most promising diverse achievements.In spite of having promising results,polymers are expensive and the flooding process is limited by reservoir temperature,make-up brine salinity and hardness due to chemical degradation of the polymer.Also,as polymer forced through formation there is a significant reduction in polymer concentration due to adsorption and plugging which can change reservoir permeability and affect recovery either positively or negatively.Therefore the focus of this study will base on investigating the extent of the effects of polymer properties in terms of oil recovery in different reservoir permeabilities through reservoir simulation.The main objective is to establish the quantity and quality of polymer to be injected so as the quality of the reservoir properties in terms of permeability.This is done as the determination of the screening criteria suitable for polymer flooding aiming to give best yield of oil recovery...