After many years of water injection development,Ng42 reservoir in Guanshang section of East Chengdao Oilfield has formed strong waterflooding.With the adjustment of infill horizontal wells and the great increase in production capacity demand,it's necessary to optimize proper producing pressure differen-tial to ensure high production capacity and oil recovery speed,and reasonably control water cut rise to a-chieve high recovery efficiency in platform's lifespan.By establishing a reservoir physical model,six produ-cing pressure differentials were established to simulate and evaluate the characteristics of water-cut chan-ges,liqid production changes,and extraction degree changes,and then to carry out comprehensive develop-ment effect evaluation.The results show that the proper producing pressure differential is 1.2 MPa during the development life cycle of the Chengdao offshore platform,and better enhancement effects have also been achieved in 251GB-P1 and 251GB-P2 wells.Therefore,it is feasible to increase oil production,oil re-covery rate and ultimate recovery degree by optimizing proper producing pressure differential in water-floo-ded reservoir.
关键词
埕岛东区/水淹油藏/加密水平井/合理生产压差/开发效果
Key words
east area of Chengdao Oilfield/water-flooded reservoir/infill horizontal wells/proper produ-cing pressure differential/development effect
维普
万方数据