On the Imbibition Model for Oil-Water Replacement of Tight Sandstone Oil Reservoirs

On the Imbibition Model for Oil-Water Replacement of Tight Sandstone Oil Reservoirs
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致密砂岩油藏油水置换渗吸模型研究

DOI:
10.1155/2021/8846132
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发表时间:
2021-05
期刊:
影响因子:
1.7
通讯作者:
Liu Yafei
Liu Yafei
中科院分区:
地球科学4区
文献类型:
--
作者:
Liu Xiong;Zhou Desheng;Yan Le;Liu Shun;Liu Yafei

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建立了适用于致密砂岩储层评价的模型。该模型包括两种油水置换模式:毛细管力模式和渗透压模式。考虑毛管力、渗透压力、生产压差和启动压力梯度的影响,得出了不同参数下油水驱替速度与无因次时间的关系。结果表明,水相相对渗透率越高,油相相对渗透率越低,油水粘度比越小,油水置换率越高。水相的相对渗透率也影响入渗稳定时间。低矿化度压裂液渗透有利于提高油水驱替效率。
A model suitable for evaluating a tight sandstone reservoir is established. The model includes two oil-water replacement modes: capillary force mode and osmotic pressure mode. The relationship between oil-water displacement rate and dimensionless time under different parameters is drawn considering the influence of capillary force, osmotic pressure, production pressure difference, and starting pressure gradient. Results indicate that the higher the relative permeability of the water phase, the lower the relative permeability of the oil phase, the smaller the oil-water viscosity ratio, and the higher the oil-water replacement rate. The relative permeability of the water phase also affects the infiltration stabilization time. Low salinity fracturing fluid infiltration helps to improve the oil-water replacement rate.
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