特高含水期油田剩余油分布研究

高含水后期油田稳产的关键取决于对剩余油的深入了解和再认识.濮城油田濮53断块油藏已经进入特高含水期,油藏产量递减大,含水上升快,注采系统适应性差.本文分别应用物质平衡法、油水相对渗透率法和沉积微相法对其剩余油分布进行了研究.以生产分析为基础,分析研究沉积微相、水淹图和剩余油饱和度之间的关系.同时在精确地质建模的基础上,对该油藏进行数值模拟研究,拟合了油田的生产动态,得出了剩余油分布规律.由此采取油针对性的挖潜措施,达到控水稳油的目的.这些研究方法对特高含水期同类油藏的剩余油分布研究具有一定的借鉴作用.

Study of Development Methods on Pucheng Oilfield in Extra-high-water-cut Stage

The steady production lies mainly in the deep knowing or re knowing,for the residual oil,in the Extra high water cut stage oilfield. Pu53 block reservoir has entered into the extra high water cut stage,oil production decreases,and water cut increases rapidly,thus adapt ability is poor in injection production system. A numerical simulation is conducted in the reservoir on the basis of precisely building a geologic model. Production performance fitting is implemented,and the law of distribution of remaining oil is derived. Based on the current production situation and problems existing in the oilfield,projects for enhancing oil recovery are proposed and the prediction is made,which is the guidance for actual production of the reservoir to a certain degree. After the stimulation of potential production is implemented,oil production enhancement is obvious. The result demonstrates that it could be used for the development of similar oil reservoirs.