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本文针对碳酸盐岩油藏出水的巨大生产性难题,在地球物理测井难以判断碳酸盐岩储层中流体性质的情况下,从岩心观察入手,从油藏地质特征分析出发,利用岩心分析资料,综合生产动态及国内外调研资料,对乐安油田碳酸盐岩潜山特稠油油藏的出水问题进行了深入探讨。提出了该类油藏具有“双油水系统”的新观点,同时指出了在较浅的进山深度及较低的生产压差下生产,以满足油藏的渗流特点,控制地层水的均匀推进,才是最有效、最根本的控制水快速锥进,延长低含水采油期,增加低含水采油量的最佳方法。
In this paper, aiming at the huge productivity problem of carbonate reservoir water, in the case of geophysical logging it is difficult to judge the fluid properties of carbonate reservoirs, starting from the core observation, starting from the analysis of reservoir geological features, Analysis of data, comprehensive production dynamics and research data at home and abroad, carried out in-depth discussion on the water outflow problem of carbonate oil-bearing special heavy oil reservoirs in the Le’an Oilfield. The new viewpoint that this kind of reservoir has “double oil-water system” is put forward. At the same time, it is pointed out that it should be produced under shallower depth and lower production pressure to meet the reservoir seepage characteristics and control the formation water Uniform propulsion is the most effective and fundamental control of rapid water coning, extending the low-water-harvesting period, increasing the best method for low-water production.