盐水组成对极性组分在石英表面吸附的影响
发布时间：2018-09-11 17:55
【摘要】：油藏按储层岩性分类主要包括:砂岩油藏、砾岩油藏、碳酸盐岩油藏等。中国砂岩油藏的储量最高,而砂岩的主要成分是石英、长石、黏土矿物等,其中石英的含量居于首位。应用岩心驱替实验、石英砂静态吸/脱附实验、模拟油接触角实验、Zeta电位实验研究了盐水的化学组成对原油中酸/碱极性组分在石英表面吸/脱附的影响。结果表明,在中性/弱碱性地层水条件下,原油中的酸性极性组分发生电离,可以通过二价阳离子架桥吸附在石英表面;碱组分不发生电离处于分子状态,且与石英表面的范德华力较弱,无法吸附在石英表面。在弱酸性条件下,酸性极性组分因电离被抑制,处于分子状态,可通过氢键吸附在石英表面;碱性组分发生电离后带正电,可通过库仑力吸附在带负电的石英表面。
[Abstract]:Reservoir classification mainly includes: sandstone reservoir, conglomerate reservoir, carbonate reservoir and so on. The reserves of sandstone reservoirs in China are the highest, and the main components of sandstone are quartz, feldspar and clay minerals, among which the content of quartz is the first. The effects of chemical composition of brine on the adsorption / desorption of acid / alkali polar components on quartz surface in crude oil were studied by using core displacement experiment, static adsorption / desorption experiment of quartz sand and simulated oil contact angle experiment (Zeta potential). The results show that under the condition of neutral / weak alkaline formation water, the acidic polar components of crude oil can be ionized, which can be adsorbed on the surface of quartz through a bridge of divalent cations, while the alkali components are not ionized in molecular state. Moreover, the van der Waals force on quartz surface is weak and can not be adsorbed on quartz surface. Under the condition of weak acidity, the acidic polar component is inhibited by ionization and is in a molecular state, which can be adsorbed on the surface of quartz by hydrogen bond, while the basic component is ionized with positive charge, which can be adsorbed on the surface of negatively charged quartz by Kulun force.
【作者单位】： 中国石油大学提高采收率研究院;中国石油化工股份有限公司胜利油田分公司滨南采油厂;
【分类号】：TE311;TE357.6
，
本文编号：2237428
[Abstract]:Reservoir classification mainly includes: sandstone reservoir, conglomerate reservoir, carbonate reservoir and so on. The reserves of sandstone reservoirs in China are the highest, and the main components of sandstone are quartz, feldspar and clay minerals, among which the content of quartz is the first. The effects of chemical composition of brine on the adsorption / desorption of acid / alkali polar components on quartz surface in crude oil were studied by using core displacement experiment, static adsorption / desorption experiment of quartz sand and simulated oil contact angle experiment (Zeta potential). The results show that under the condition of neutral / weak alkaline formation water, the acidic polar components of crude oil can be ionized, which can be adsorbed on the surface of quartz through a bridge of divalent cations, while the alkali components are not ionized in molecular state. Moreover, the van der Waals force on quartz surface is weak and can not be adsorbed on quartz surface. Under the condition of weak acidity, the acidic polar component is inhibited by ionization and is in a molecular state, which can be adsorbed on the surface of quartz by hydrogen bond, while the basic component is ionized with positive charge, which can be adsorbed on the surface of negatively charged quartz by Kulun force.
【作者单位】： 中国石油大学提高采收率研究院;中国石油化工股份有限公司胜利油田分公司滨南采油厂;
【分类号】：TE311;TE357.6
，
本文编号：2237428
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