海上底水稠油油藏热采适应性预测新方法

以渤海底水稠油油藏地质油藏参数为基础,建立机理模型,利用数值模拟方法研究了水体倍数、油层厚度、原油黏度、渗透率、Kv/Kh、非均质性对蒸汽吞吐效果的影响;采用灰色关联方法进行了多因素敏感性分析,并通过多元回归建立了底水稠油油藏蒸汽吞吐的采收率计算公式,该公式综合考虑了影响底水稠油油藏蒸汽吞吐效果的各种因素;应用拟合公式对渤海实际油田的采收率进行预测,证实该方法简便、易于实现,且具有较高的精度。

A new forecast method of thermal recovery adaptability in offshore heavy oil reservoirs with bottom water

Based on reservoir parameters of Bohai heavy oil reservoir with bottom water,the mechanism model has been established.By using numerical simulation methods,the impacts of water multiples,the reservoir thickness,oil viscosity,permeability,Kv/Kh,heterogeneity on steam stimulation have been analyzed.With the gray correlation method,a multivariate sensitivity analysis has been carried out.Besides that,through multiple regressions,the recovery calculation formula of heavy oil reservoir with bottom water has been established.Taking the comprehensive consideration of various factors affecting the steam stimulation into account,the fitting formula has been applied to predict the actual recovery of Bohai.The results indicate the method is simple,easy to implement and has a high accuracy.