Optimization Study On Water Coning Control Of Heavy Oil Reservoir With Bottom Water

The high viscosity of the crude oil cause high mobility ratio of water and oil in heavy oil reservoir with bottom water,leading to bottom water coning,which has an effect on crude oil production.However,enhancing the oil production rate and injecting the cold water are common methods of the bottom water coning control to improve the heavy oil recovery degree,which will greats production pressure drop and the viscosity of crude oil and results in the increasing of the power of bottom water coning and water-oil mobility ratio.So these methods have bad effects on the production of heavy oil reservoir with bottom water,aggravating bottom water coning,and reducing the heavy oil recovery.In this paper,according to the problems in the exploitation of heavy oil reservoir with bottom Water,the techniques of single well integral water production-injection,water drainageoil production,and composite technique of water drainage-oil production with artificial barrier are taken to change the method of water injection and oil production which provides scientific and effective methods for oil recovery improving and water cut control.The mechanism of inhibiting water coning,application condition and parameter of water coning control is studied about the techniques.Reasonable projects are put forward to control the water coning and improve the recovery degree of reservoir when the techniques are used in DongXin oil field.It is shown that the techniques of single well integral water production-injection,water drainage-oil production,and composite technique of water drainage-oil production with artificial barrier are effect methods to inhibit the water coning and to improve the recovery degree of reservoir,and each technique is suitable for the specific conditions.The application conditions in DongXin oil field show that the effectiveness of the techniques of single well integral water production-injection,water drainage-oil production,and composite technique of water drainage-oil production with artificial barrier becomes better gradually,and composite technique of water drainage-oil production with artificial barrier is the best.