Analysis of Reservoir Applicability of Hydrophobically Associating Polymer
Analysis of Reservoir Applicability of Hydrophobically Associating Polymer
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DOI：
10.2118/174553-pa
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发表时间：
2016-02-01
期刊：
影响因子：
3.6
通讯作者：
Yu, Qin
中科院分区：
文献类型：
--
作者：
Xie, Kun;Lu, Xiangguo;Yu, Qin
本文以渤海某油田油藏的储层特征和流体性质为研究平台，证实了疏水缔合聚合物（HAP）分子聚集与孔喉尺寸之间存在配伍性。非均质岩心驱油实验表明，HAP对非均质油藏具有适用性，且该适用性受聚合物浓度影响。平行岩心驱油实验从驱油动态行为和驱油效果两个方面论证了聚合物浓度对HAP针对油藏非均质性适用性的影响。结果表明，随着HAP浓度增加，聚合物分子间缔合程度增大，分子线团尺寸变大，岩心孔喉的配伍尺寸增大。HAP浓度的变化不仅对不同渗透率层的吸液量和剖面反转时间有影响，还对聚合物溶液在不同层内的驱替能力有影响。随着聚合物浓度变化，HAP对油藏非均质性的适应性以及采收率均发生变化。
In this paper, the reservoir characteristics and fluid properties of a reservoir of the Bohai Sea oil field were taken as the research platform. It was confirmed that there exists compatibility between hydrophobically-associating-polymer (HAP) molecular aggregation and pore-throat size. The experiment for oil displacement in heterogeneous cores indicated that there exists applicability of HAP for a heterogeneous reservoir and the applicability can be influenced by polymer concentration. The experiment for oil displacement of parallel cores demonstrated the effect of polymer concentration on the applicability of HAP for reservoir heterogeneity from two aspects of the dynamic behavior of oil displacement and the effectiveness of oil displacement. The results show that with the increase of HAP concentration, the association degree between polymer molecules increases, molecular-clew dimension enlarges, and the compatible size of pore throats of the core increases. The change of HAP concentration not only has an effect on the amount of liquid suctioned by different permeability layers and on the time of profile inversion, but also has an effect on the displacement ability of polymer solution within different layers. As polymer concentration changes, the adaptability of HAP for reservoir heterogeneity changes and the oil-recovery efficiency also changes.