Abstract: In the process of bottom water reservoir development, bottom water coning leads to the problem of increasing water content in production wells. A three-dimensional vertical-well reservoir physical simulation device was established, and was used to study the nitrogen injection for controlling bottom water coning. The influencing rules of nitrogen injection timing, injection rate, injection volume and shut-off time were studied. The research shows that the production wells to injection of nitrogen in bottom water reservoir can effectively reduce the produced liquid water content, prolong production time, so as to achieve the effect of stabilizing oil production by control of the bottom water coning. When the nitrogen injection was carried out, the injection rate of nitrogen had little effect on the water control effect, and the injection rate of nitrogen and the time after the injection of gas had a great influence on the effect of water control.

Key words: Bottom water reservoir,    , Nitrogen,    , Bottom water coning,    , Physical simulation

摘要：         针对底水油藏直井开采过程中底水锥进造成生产井含水不断升高的问题,建立了三维底水油藏直井开采物理模拟装置,对注入氮气控制底水入侵进行了研究,主要考察了氮气注入时机、注入速度、注入量以及关井时间对控制底水入侵的影响规律。研究表明,从生产井向底水油藏中注入氮气能够有效地降低采出液含水率,延长有效生产时间,从而达到控水稳油的效果。实施注氮气时,氮气的注入速度对控水的效果影响较小,而氮气的注入量和注气后的关井时间对于控水的效果影响较大。

关键词: 底水油藏,   ,  氮气,   ,  底水锥进,   ,  物理模拟