草20馆陶一砂体水侵规律研究及潜力评价

Study of the Water Invasion Rules and Potential Evaluation to the First Sands of Ng Formation

乐安油田草20块特稠油油藏馆一砂体自2001年起全面水淹。通过建立精确地质模型,进行开发历史拟合、蒸汽吞吐效果分析,同时研究边水水侵规律,研究边水对开发工作制度的影响以及下一步控制边水可能的措施、方向和做法。结合建立的精细地质模型和模拟结果,对目前草20区块的剩余油分布规律进行分析,得到有关定量的技术指标,确定了后期改善开发效果挖潜方向。

The first sands of the Ng Formation, an super-heavy-oil reservoir in Cao20 block in Lean oilfield, have been completely flooded since 2001. In this paper, by building the exact geological model, we conduct the simulation of the development history, analyze the effect of the steam stimulation, then find out the rules of the edge water invasion, investigate the effect of the edge water on the development parameters, define the steps and the directions to control the edge water in future. According to the exact geological model that has been built and the simulation result, we can analyze the rules of the remainding-oil distribution in Cao20 block and get the quantitative technique index we want. After that, we find out a way to improve the production rate in the late development period.