The Effect Analysis of Shut-in Coning Control

Bottom water coning is the main problem in reservoir development with bottom water,and shut-in coning control is widely used.To guide on-site shut-in coning control and achieve maximum economic profit,analysis and evaluation of the influencing factors and effectiveness of the shut-in coning control are done in this paper through mechanism analysis,theoretical calculation and numerical simulation,etc.In addition,the paper defines the simulation factor,a dimensionless parameter to evaluate the effect of shut-in coning control method and this factor can make the effect evaluation with the above method more accurate.The research shows that shut-in coning control played a role in increasing oil production;the coning control effect is related to the duration of shut-in and water cut,and the incremental oil would be lower with longer shut-in and higher water cut.However,due to the fact incremental oil is less than the oil lost during the shut-in stage,the well shows a decrease of cumulative oil production.The effect analysis of field applications in the Bohai bottom water reservoir verifies the theoretical and numerical simulation results.Therefore,it is suggested that shut-in coning control method should be used with caution during the development of the bottom water reservoir to overcome the adverse effect by the bottom water coning.