注水油田转周期注水开发影响因素探讨  

Study on Factors Affecting Cyclic Water Injection Performance

作　　者：姜泽菊[1] 安申法[1] 于彦[2] 赵延茹[1] 沈静[1] 

机构地区：[1]胜利油田有限公司采油工艺研究院,山东东营257000 [2]胜利油田有限公司孤岛采油厂,山东东营257231

出　　处：《石油钻探技术》2005年第6期54-56,共3页Petroleum Drilling Techniques

摘　　要：简要分析了周期注水改善注水开发效果的作用机理,给出了周期注水的适用条件和评价注水油田转为周 期注水的可行性计算公式,详细分析了影响周期注水效果的因素,得出:周期注水越早越好,但最佳时机需进行数值 模拟;渗透率越小周期注水的周期越长,地层弹性越差,周期注水的周期越短;油层越不均质,周期注水的注水效果 越好;毛管力适中时,周期注水的效果最好;垂直渗透率与水平渗透率之比为0．5时,周期注水的效果最好;采用不 对称的短注长采的注水和采油交替进行的工作制度,周期注水的效果最好。国外大量的现场应用试验证明,采用周期 注水可以取得较好的开发效果。This paper briefly analyzes mechanisms of enhancing recovery effectiveness by cyclic water injections, presents applicable conditions of cyclic water injection process and equations to evaluate feasibility of turning continuous water injection into cyclic water-injection , analyzes in detail factors affecting cyclic water flooding effectiveness. The following conclusions are drawn. the earlier the cyclic waterflooding process, the better the effectiveness, but the optimal time should be determined by numerical simulations; the longer the cycle of the process, the less the permeability; the shorter the cycle, the less the formation elasticity; the better the effects, the less the pay zone uniformity; the effectiveness will be the best at proper capillary force. If the ratio of vertical permeability to horizontal one is 0.5, the process effects will be the best ; Carrying out nonsymmetrical injection-production process and oil production in turn will get the best cyclic waterflooding effects. Field applications abroad show that cyclic waterflooding process can achieve better recovery effectiveness.

关 键 词：注水 周期性注入 注水时机 注水效果 注水周期 提高采收率 

分 类 号：TE357.6[石油与天然气工程—油气田开发工程]