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首页> 外文期刊>Energy and Environment Research >Mechanistic Study of the Wettability Modification in Carbonate and Sandstone Reservoirs during Water/Low Salinity Water Flooding
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Mechanistic Study of the Wettability Modification in Carbonate and Sandstone Reservoirs during Water/Low Salinity Water Flooding

机译：水/低盐度水驱过程中碳酸盐岩和砂岩储层润湿性改变的机理研究

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The paper pertains to the analysis of the chemical interaction between sea water ions, asphaltene colloids and silicate /calcite mineral as a substrate during water/low salinity water flooding. The work tackles modeling of salinity dependent relative permeability and capillary pressure functions from contact angle to estimate oil recovery during water/low salinity water. The paper has two main parts. In the first part, static contact angle is calculated based on disjoining pressure and compared to the experimental values, reported in the literature. In the second part, the model is used to demonstrate that water film is more stable in presence of low salinity water compared to distilled water and sea water, for carbonate and silicate minerals. Increasing temperature enhances the stability of the water film around the substrate for both types of minerals. This could be future interpreted as an indication for extra oil recovery applying low salinity water injection at elevated temperature. It is interesting to observe from the model that, increasing the Mg 2+ ion concentration enhances the hydrophilicity characteristics for calcite mineral modified by asphaltene while for silicate surface modified by asphaltene, SO 4 2- ion enhances the hydrophobicity behaviour.
机译：本文涉及在水/低盐度水驱过程中，海水离子，沥青质胶体和以硅酸盐/方解石矿物为基质的化学相互作用的分析。该工作从接触角着手解决盐度依赖的相对渗透率和毛细管压力函数的建模问题，以估计水/低盐度水期间的油采收率。本文有两个主要部分。在第一部分中，基于分离压力计算静态接触角，并将其与实验值进行比较，文献中对此进行了报道。在第二部分中，该模型用于证明碳酸盐和硅酸盐矿物的水膜在低盐度水存在下比蒸馏水和海水更稳定。温度升高对两种矿物均增强了基材周围水膜的稳定性。将来可以将此解释为在高温下注入低盐度水可额外采油的指示。从模型中可以观察到有趣的是，增加Mg 2+离子的浓度可增强沥青质改性的方解石矿物的亲水性，而对于沥青质改性的硅酸盐表面，SO 4 2-离子可增强疏水性。

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