渤海L油田早期注聚效果评价方法研究

目前对于早期注聚效果的评价没有成熟的方法,增油降水的效果基本依靠动态分析方法评价,由于早期注聚与晚期注聚的很大不同,造成动态分析方法在评价早期注聚效果方面存在很大的局限性。本文引入一种早期注聚效果评价的新方法,运用数值模拟技术对渤海L早期注聚效果进行全面的评价,建立高精度历史拟合的数值模型,并建立假想的水驱模型,使之与实际模型对比,结果表明,通过数值模拟法计算的增油量与动态分析法相比更加精确,原因是数值模拟法排除了各种措施带来的干扰,且考虑了油田的递减规律。另外建立了不同含水时机注聚的模型,通过分析认为,目前渤海L油田实行的早期注聚在各方面相较其他含水时机注聚具有很大优势。

New Evaluation Method of Early Polymer Flooding in L Offshore Oilfield

L oilfield is an offshore heavy oil field, which is developed by early polymer flooding because of the short life of platform. There is still no reliable way to evaluate the effect of early polymer flooding. Usually dynamic analysis is used to evaluate polymer flooding. But it is not suitable for early polymer flooding because it is different with ordinary polymer flooding. In this paper, a new evaluation method using numerical simulation was introduced. High accuracy history matched field-scale model and hypothetical water flooding model were built separately to do the comparison. It showed that, numerical simulation as an early polymer flooding evaluation method is more convenient and accurate than dynamic analysis. The reason is that the effect of well stimulation and decline is eliminated. Besides, models with different injection time were built and calculated. It showed that early polymer flooding is the optimal way to develop L oilfield, contrasting with late polymer flooding.