Research On Reasonable Injection And Production Parameters Technology Limits In Polymer Flooding Follow-up Water Flooding

Polymer flooding technique and various allied technique have been gradually improved. Besides, the scale of polymer flooding is getting bigger year by year. Therefore, polymer flooding has been the key technique support for maintaining high production and improving the level of oil-field development for Daqing oil-field in later high water-cut stage. At present, the primary layer in daqing oil-field gradually comes to succeeding water flooding stage. The polymer flooding experiment shows that ,when turning to succeding water flooding, the integrated water-cut is about 93% and the average production of producers per day can maintain 8 tons which shows that the reservior still has proper potential. Therefor, we can see that succeeding water flooding stage is very important in the whole period of polymer flooding. So research on injecting and producing techniques and adjusting methods in succeeding water flooding stage is expecially important for further improving final recovery efficiency.This paper is the combination of dynamic polymer flooding actual production data, monitoring data of Sabei development area in Daqing Oilfield, by numerical simulation, we have researched polymer flooding distribution of the remaining oil.By numerical simulation and more programmes compared, we have established injection and production parameters adjustment technology boundaries. Application of principles of profit and loss, according to production, costs and profits, and setting up the production wells shut-in model of economic and technological boundaries, are given reasonable shut-in economic and technological limits and shut-in approachat at different prices and the cost circumstances...