摘要
超前注水有利于建立有效的驱替压力系统，有利于提高单井产量和最终采收率．本文在充分考虑特低渗储层存在启动压力特点的基础上，通过渗流规律、数值模拟和矿场数理统计研究，提出超前注水期合理地层压力保持水平、注水压力、注水强度、注水时机等开发技术政策，在长庆油田现场推广应用后取得较好的开发效果。可以提高单井产量20％-30％。
Waterflooding in advance is a considerable advantage in establishing an effective disphcement pressure system and increasing the well production rate and ultimate recovery. A series of technological policies of development has been put forward in the paper such as a rational pressure maintenance level, injection pressure, water intake per unit thickness, and suitable injection time, during the advanced Waterllooding period, through study of percolation laws, numerical simulation, and field mathematical and physical statistics, on the basis of sufficient consideration of characteristics that there is a kick-off pressure in extra-low permeability reservoirs. Good results of development are obtained by application and widespread of the technology of advanced watetflooding to Changqing oilfield. The well production rate can be raised by 20%-30%.
关键词
特低渗
超前注水
开发技术政策
长庆油田
extra-low permeability
waterflooding in advance
technological policy of development
Changqing oilfield
