文留油田高含水期开发特点及技术界限的探讨

分析论证了复杂断块油田高含水期的开发特点，指出了当前开发中亟待解决的几个问题。油田在高含水期主要的开发特点是：水驱油方式发生变化，含水上升速度变缓．水油比增长快，采液指数增加，采油指数下降，产量递减加剧，地下剩余油分布状况进一步复杂．套管腐蚀和井况变坏更加严重等等。文章最后提出了高压、高温深层、低渗复杂断块油田在高含水期开发的几个主要技术界限，包括注水压力、井底流压和地层压力保持界限，最大产液量和注水量界限。

The Development Characteristics of Wenliu Oilfield in High Water-Cut Period and Several Technical Boundaries

The development characteristics of complicated fault-block reservoir inhigh water-cut period, in this paper, is analysed and expounded, and several existingquestions which are urgent to be solved in development are pointed out. The maindevelopment characteristics of oilfield in high water-cut period is the way of water-drive-oilchanging, the velocity of water-cut increasing slowly, the rate of water/oil increasing fast,liquid production index increasing, productivity index decreasing, the production decreasingfast. Distribution of formation residual oil becoming more complicated, casing corrosionbecoming more serious and hole condition being worse and worse- Finally, several maintechnical boundaries of the complicated fault-block reservoir which has the peculiarities ofhigh formation pressure, high temperature, deep formation and low permeability during itshigh water-cut period,are put forward. They are the boundaries of water injection pressure,flowing bottom hole pressure, formation pressure, the maximum fluid production and thewater injection rate.