盐水组成对极性组分在石英表面吸附的影响

doi:10.7623/syxb201702009

石油学报 ›› 2017, Vol. 38 ›› Issue (2): 217-226.DOI: 10.7623/syxb201702009

盐水组成对极性组分在石英表面吸附的影响

陈晨¹, 董朝霞¹, 高玉莹¹, 林梅钦¹, 杨子浩¹, 杨杰¹, 高景滨²

1. 中国石油大学提高采收率研究院北京 102249;
2. 中国石油化工股份有限公司胜利油田分公司滨南采油厂山东滨州 256600

收稿日期:2016-07-09 修回日期:2016-11-13 出版日期:2017-02-25 发布日期:2017-03-08
通讯作者: 董朝霞,女,1974年6月生,1996年获大连轻工业学院学士学位,2002年获石油大学(北京)博士学位,现为中国石油大学(北京)提高采收率研究院教授、博士生导师,主要从事胶体与界面化学提高采收率方面的科研工作。Email:dzx@cup.edu.cn
作者简介:陈晨,男,1991年4月生,2013年获曲阜师范大学学士学位,现为中国石油大学(北京)硕士研究生,主要从事油田提高采收率研究工作。Email:863082364@qq.com

Effects of brine composition on quartz surface absorption of polar components

Chen Chen¹, Dong Zhaoxia¹, Gao Yuying¹, Lin Meiqin¹, Yang Zihao¹, Yang Jie¹, Gao Jingbin²

1. Enhanced Oil Recovery Research Institute, China University of Petroleum, Beijing 102249, China;
2. Binnan Oil Production Plant, Sinopec Shengli Oilfield Company, Shandong Binzhou 256600, China

Received:2016-07-09 Revised:2016-11-13 Online:2017-02-25 Published:2017-03-08

摘要/Abstract

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。

关键词: 盐水组成, 粒子间相互作用, 原油极性组分, 吸/脱附, 岩心驱替实验, 接触角

Abstract:

According to the classification of reservoir lithology, reservoirs mainly include sandstone reservoir, conglomerate reservoir and carbonate reservoir. Except sandstone reservoir, other reservoirs have smaller reserves in China. Sandstones mainly consist of quartz, feldspar and clay minerals, of which quartz has the highest content. Core flooding experiment, quartz sand static adsorption/desorption experiment, simulated oil contact angle experiment, Zeta potential experiment were applied to study the effects of brine chemical composition on quartz surface adsorption/desorption of acidic/basic polar components in crude oil. The results show that under the conditions of neutral/weakly basic formation water, ionization occurs in the acidic polar components of crude oil, and these components are absorbed on quartz surface through bivalent-cation bridging adsorption; no ionization occurs in the basic polar components being in a molecule state, and these components are unable to be absorbed on quartz surface due to the weak Van der Waals force between them. Under the weak acidic conditions, the acidic polar components are inhibited by ionization to be in a molecule state, which are absorbed on quartz surface through hydrogen bond; the basic components are positively charged after ionization, which can be absorbed on the quartz surface with negative charge by Coulomb force.

Key words: brine composition, inter-particle interaction, polar components of crude oil, adsorption/desorption, core flooding experiment, contact angle

中图分类号:

TE135

陈晨, 董朝霞, 高玉莹, 林梅钦, 杨子浩, 杨杰, 高景滨. 盐水组成对极性组分在石英表面吸附的影响[J]. 石油学报, 2017, 38(2): 217-226.

Chen Chen, Dong Zhaoxia, Gao Yuying, Lin Meiqin, Yang Zihao, Yang Jie, Gao Jingbin. Effects of brine composition on quartz surface absorption of polar components[J]. Acta Petrolei Sinica, 2017, 38(2): 217-226.

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盐水组成对极性组分在石英表面吸附的影响

Effects of brine composition on quartz surface absorption of polar components

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