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气顶油藏作为一类较为复杂的油气藏类型,在开发中遇到的最主要问题就是气顶气锥进,造成油井气窜,严重影响油井产能。以渤海锦州25-1南油田Es3-I油藏为研究对象,应用数值模拟方法对屏障注水技术开发大气顶窄油环油藏的对策机理进行了系统论证,并分析了对该类油藏实施屏障注水的技术可行性以及合理屏障注水比例、注水时机等开发参数。结果表明:与衰竭开发脑及常规注水开发方式相比,屏障注水开发能显著提高此类油藏的采收率。
Gas cap reservoir, as a kind of more complex reservoir type, is the most important problem encountered in the development of gas cap coning, resulting in gas well channeling and seriously affecting well productivity. Taking Es3-I reservoir in Jinzhou 25-1 South Oilfield in Bohai as the research object, the numerical simulation method was used to systematically demonstrate the mechanism of barrier water injection in the development of the top-narrow oil-ring reservoir in the atmosphere, Technical feasibility of barrier waterflooding and reasonable barrier waterflooding ratio, waterflooding timing and other development parameters. The results show that barrier waterflooding can significantly improve the oil recovery of such reservoirs compared to exhausted development of brain and conventional waterflood development methods.