论文部分内容阅读
在油田开发中,注水是保持油层压力、实现油田高产稳产,提高原油采收率的有效方法。油田注水系统的特点是注水量大,注水压力高,系统效率低,耗电量大。在当前供电紧张的情况下,分压注水(即根据不同水井所需注水压力的大小而分成不同的注水系统)则是提高管网效率、油田节电的重要措施。例如大庆喇、萨、杏油田是非均质多层系的砂岩油田,油层多(9组137层),渗透率差别大(从0.02μm~2到1μm~2),油层深度不一样(从700m至1100m),因此各类注水井注水压力相差很大(从9MPa到15MPa以上)。如果全部注水井在同一注水压力下
In the development of oilfields, water injection is an effective way to maintain the pressure of oil layer, realize the high and stable output of oilfields and increase the recovery rate of crude oil. Oilfield water injection system is characterized by a large amount of water injection, water injection pressure, low system efficiency, power consumption. Under the current shortage of power supply, partial pressure water injection (that is, according to the different water injection pressure required for the size of the water injection into different systems) is to improve the efficiency of the pipe network, an important measure for saving oil. For example, the Daqing La, Sa and Xing oilfields are heterogeneous multi-layered sandstone oilfields with many oil layers (9 groups of 137 layers) with large differences in permeability (from 0.02μm 2 to 1μm 2) and different reservoir depths (from 700m To 1100m), so all kinds of water injection well water pressure vary greatly (from 9MPa to 15MPa above). If all injection wells are under the same injection pressure