综合利用动静态资料研究剩余油分布规律

由于海上油田开发成本高,油田高含水后期打高效调整井对油田稳产和提高油田采收率有重要意义。打高效调整井的关键取决于对剩余油的深入了解和再认识。首先对油藏进行小层划分与对比、储层沉积微相、储层非均质性等研究,建立精细地质模型,对油藏进行数值模拟研究,得出数值模拟的剩余油分布规律;其次应用碳氧比测井结果、油藏动态分析得到的水淹规律验证数值模拟的剩余油分布规律;根据剩余油分布的研究结果,设计调整井方案并实施。实施结果表明,综合利用动静态资料研究剩余油分布的方法合理可靠,得到的剩余油分布认识是正确的,揭示了沉积微相、储层非均质、微构造及井网条件等因素对剩余油分布的控制作用。该方法对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。

Residual oil distribution research comprehensively utilizing dynamic and static data

For high development cost of offshore oilfield,it is much significance for stable production and higher recovery efficiency of oilfield to drill high effective adjustment well at later period of high water.The key of drilling high effective adjustment well is deep understanding and re-understanding of residual oil.First of all,fine geological model is established by reservoir researches on thin layer division and contrast,sedimentary micro facies of reservoir,reservoir heterogeneity and so on,and residual oil distribution law of numerical simulation is obtained by reservoir research on numerical simulation.Secondly,water-flood law obtained by c/o logging results and reservoir dynamic analysis is applied to verify residual oil distribution law of numerical simulation.According to research results of residual oil distribution,adjustment well plan is designed and implemented.It shows that comprehensively utilizing dynamic and static data to study residual oil is reasonable and the recognition of residual distribution obtained is correct,which reveals the controlling function on residual oil distribution such as sedimentary micro-facies,reservoir heterogeneity,microstructure,well network condition and so on.The said method is of certain reference for research on residual oil distribution of such reservoir at period of high water.