鄂尔多斯盆地裂缝性低渗透油藏渗吸驱油研究

发布时间：2018-06-27 08:19

本文选题：低渗透油藏 + 渗吸　；参考：《断块油气田》2017年05期

【摘要】：裂缝性低渗透油藏储层岩性致密,裂缝发育,非均质性强,注水开发效果差,利用水的自发渗吸作用驱油是一种经济有效的开发手段。文中利用鄂尔多斯盆地延长油田西区采油厂的天然露头岩心,通过自发渗吸实验,研究了边界条件、润湿性、温度、原油黏度、界面张力及渗透率等因素对渗吸驱油作用的影响。实验结果表明:润湿性、黏度、界面张力及渗透率是影响渗吸驱油的主要因素,岩石越亲水,原油黏度越低,渗吸驱油效果越好。对于亲水岩心,渗透率相近时,界面张力为0.04 m N/m时渗吸效果最佳;岩石渗透率差异明显时,渗透率为2.94×10~(-3)μm~2时渗吸效果最佳。实验结果为鄂尔多斯盆地裂缝性低渗透油藏渗吸驱油提供了重要的指导作用。
[Abstract]:The reservoir lithology of fractured low permeability reservoir is compact, the fracture is developed, the heterogeneity is strong, and the effect of water injection development is poor. It is an economical and effective development method to use the spontaneous permeability and suction of water to drive oil. In this paper, the natural outcrop cores in the western oil production plant of Yanchang Oilfield in Ordos Basin are used to study the boundary conditions, wettability, temperature and viscosity of crude oil through spontaneous permeation and suction experiments. The effect of interfacial tension and permeability on oil absorption and flooding. The experimental results show that wettability, viscosity, interfacial tension and permeability are the main factors that affect oil absorption and flooding. The hydrophilic rock, the lower the viscosity of crude oil, the better the oil absorption and displacement effect. For hydrophilic core, when the permeability is close, the permeability is the best when the interfacial tension is 0.04 m / m, and the permeability is 2.94 脳 10 ~ (-3) 渭 m ~ 2 when the permeability difference is obvious. The experimental results provide important guidance for oil absorption and flooding in fractured low permeability reservoirs in Ordos Basin.
【作者单位】：陕西延长石油(集团)有限责任公司研究院;
【基金】：陕西省科技新星项目“延长油田西部长7油层组储层特征研究”(2016KJXX-42)
【分类号】：TE357.6

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