海上稠油油藏层间干扰系数确定新方法

发布时间：2018-06-05 06:01

本文选题：海上油田 + 稠油油藏　；参考：《中国海上油气》2017年05期

【摘要】：海上油田开发一般采用多层合采方式,层间干扰严重,现有数值模拟软件得到的层间干扰系数与矿场产能测试结果差别较大。提出了考虑拟启动压力梯度确定层间干扰系数的油藏数值模拟方法。以渤海SZ稠油油藏为例,利用束缚水下油相驱替实验建立了SZ油藏拟启动压力梯度与储层流度的关系式;数值模拟时根据油藏非均质性情况设置平衡分区,利用THPRES关键字将两个不同平衡分区间的门限压力设置成拟启动压力(拟启动压力梯度乘以网格尺寸),实现了考虑拟启动压力梯度的数值模拟过程。实例应用结果表明,利用本文方法模拟所得层间干扰系数与产能测试结果吻合程度提高。本文方法在海上稠油油藏合理划分和调整开发层系中有较好的实用性。
[Abstract]:In offshore oilfield development, multi-layer combined production is generally adopted, and the interlayer interference is serious. The interlayer interference coefficient obtained by the existing numerical simulation software is quite different from the result of field productivity test. A reservoir numerical simulation method considering quasi-starting pressure gradient to determine interlayer interference coefficient is proposed. Taking the SZ heavy oil reservoir in Bohai Sea as an example, the relationship between the pseudo-start pressure gradient and the reservoir mobility in SZ reservoir is established by using the bound underwater oil phase displacement experiment, and the equilibrium zoning is set up according to the reservoir heterogeneity in the numerical simulation. By using THPRES keyword, the threshold pressure of two different equilibrium intervals is set to pseudo-start pressure (pseudo-start pressure gradient times mesh size), and the numerical simulation process considering quasi-start pressure gradient is realized. The results of practical application show that the interlayer interference coefficient simulated by this method is in good agreement with the result of productivity measurement. This method has good practicability in rational division and adjustment of development series in offshore heavy oil reservoirs.
【作者单位】：中国地质大学(北京);中海油研究总院;
【基金】：“十三五”国家科技重大专项“中海油油气开发发展战略研究(编号:2016ZX05016-006-006)”部分研究成果
【分类号】：TE53

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