{"title":"Interaction of Cationic Surfactants with Anionic Polymers for Improving Oil Production","authors":"L. Xu, M. Han, J. Wang, A. Alsofi","doi":"10.3997/2214-4609.202112760","DOIUrl":null,"url":null,"abstract":"Surfactants used for chemical flooding were usually anionic surfactants such as sulfate, sulfonates and carboxylates with different hydrophobic chains (Hirasaki et al. 2011, Negin et al. 2017). This is due to most chemical flooding applications were in sandstone reservoirs (Sheng 2010, Guo et al. 2018, Alvarado and Manrique, 2010). Sandstone is composed of quartz (SiO2) grains cemented together with a variety of minerals. As a result, the rock surface of sandstone is negatively charged. The adsorption of anionic surfactants on sandstone is low due to electrostatic repulsion. Polymers used were also negatively charged such as partially hydrolyzed polyacrylamides (Needham and Doe 1987, Zhu et al. 2015) and sulfonated polyacrylamides (Moradi-Araghi et al. 1987, Levitt et al. 2008).","PeriodicalId":143998,"journal":{"name":"82nd EAGE Annual Conference & Exhibition","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"82nd EAGE Annual Conference & Exhibition","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.3997/2214-4609.202112760","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
Surfactants used for chemical flooding were usually anionic surfactants such as sulfate, sulfonates and carboxylates with different hydrophobic chains (Hirasaki et al. 2011, Negin et al. 2017). This is due to most chemical flooding applications were in sandstone reservoirs (Sheng 2010, Guo et al. 2018, Alvarado and Manrique, 2010). Sandstone is composed of quartz (SiO2) grains cemented together with a variety of minerals. As a result, the rock surface of sandstone is negatively charged. The adsorption of anionic surfactants on sandstone is low due to electrostatic repulsion. Polymers used were also negatively charged such as partially hydrolyzed polyacrylamides (Needham and Doe 1987, Zhu et al. 2015) and sulfonated polyacrylamides (Moradi-Araghi et al. 1987, Levitt et al. 2008).
用于化学驱的表面活性剂通常是阴离子表面活性剂，如具有不同疏水链的硫酸盐、磺酸盐和羧酸盐(Hirasaki et al. 2011, Negin et al. 2017)。这是由于大多数化学驱应用于砂岩储层(Sheng, 2010; Guo等，2018;Alvarado和Manrique, 2010)。砂岩是由石英(SiO2)颗粒与多种矿物胶结在一起而成。因此，砂岩的岩石表面带负电荷。阴离子表面活性剂由于静电斥力的作用，在砂岩上的吸附较低。所使用的聚合物也带负电，如部分水解的聚丙烯酰胺(Needham and Doe 1987, Zhu et al. 2015)和磺化的聚丙烯酰胺(Moradi-Araghi et al. 1987, Levitt et al. 2008)。
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