Acidification retardation caused by shielding of cationic surfactants
In order to reduce the damage of adsorption and retention of traditional gelled acid in carbonate porous media, and reduce the damage to permeability of dense carbonate rock after stimulation. It is proposed that the quaternary ammonium cationic surfactant can be adsorbed on the rock surface for mod...
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Editorial Department of Petroleum Reservoir Evaluation and Development
2023-02-01
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| Series: | Youqicang pingjia yu kaifa |
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| Online Access: | https://red.magtech.org.cn/fileup/2095-1426/PDF/1675063828351-551518901.pdf |
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| author | SHEN Xin,GUO Jianchun,WANG Shibin |
| author_facet | SHEN Xin,GUO Jianchun,WANG Shibin |
| author_sort | SHEN Xin,GUO Jianchun,WANG Shibin |
| collection | DOAJ |
| description | In order to reduce the damage of adsorption and retention of traditional gelled acid in carbonate porous media, and reduce the damage to permeability of dense carbonate rock after stimulation. It is proposed that the quaternary ammonium cationic surfactant can be adsorbed on the rock surface for modification and then show retarding performance. Taking the carbonate rock in Majiagou Formation of Ordos Basin as the research object, based on the basic property tests, the adsorption capacity of cationic surfactant with different carbon chain length is determined, and the retarding mechanism of cationic surfactant is proposed by using molecular simulation technology combined with atomic force microscope and wetting angle observation. Then, the retarding performance and formation damage degree of cationic surfactant are studied by dynamic/static retarding performance test and damage evaluation experiment. The research results show that: ① Carbon chain length affects the interfacial adsorption effect by changing the adsorption form of surfactant molecules. C14TAC can form a vertical dense adsorption layer on the rock surface with the best wetting modification effect. ② The surface of rock is covered by cationic surfactant with interface adsorption, which can increase its hydrophobicity, prevent H+ from contacting the rock surface, control the surface reaction rate, and achieve the purpose of retardation. ③ Compared with conventional acids, cation surfactants have good actionic and static slow performance, the kinetic parameters are reduced by 50 %~60 %, reducing the damage to the carbonate orifice throat. It is concluded that the quaternary ammonium salt cationic surfactant has the advantages of low molecular weight and strong interfacial adsorption ability, while maintaining the retarding ability, and effectively reducing the damage of thickened acid to the formation. This study is helpful to understand the rapid performance of the surfactant, improve the slow acid system, and improve the effect of carbonate reservoir reformation. They are all of positive significance. |
| format | Article |
| id | doaj-art-89327bb280784bd9a2007baac2afe76f |
| institution | DOAJ |
| issn | 2095-1426 |
| language | zho |
| publishDate | 2023-02-01 |
| publisher | Editorial Department of Petroleum Reservoir Evaluation and Development |
| record_format | Article |
| series | Youqicang pingjia yu kaifa |
| spelling | doaj-art-89327bb280784bd9a2007baac2afe76f2025-08-20T03:19:19ZzhoEditorial Department of Petroleum Reservoir Evaluation and DevelopmentYouqicang pingjia yu kaifa2095-14262023-02-0113111712610.13809/j.cnki.cn32-1825/te.2023.01.013Acidification retardation caused by shielding of cationic surfactantsSHEN Xin,GUO Jianchun,WANG Shibin0State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, ChinaIn order to reduce the damage of adsorption and retention of traditional gelled acid in carbonate porous media, and reduce the damage to permeability of dense carbonate rock after stimulation. It is proposed that the quaternary ammonium cationic surfactant can be adsorbed on the rock surface for modification and then show retarding performance. Taking the carbonate rock in Majiagou Formation of Ordos Basin as the research object, based on the basic property tests, the adsorption capacity of cationic surfactant with different carbon chain length is determined, and the retarding mechanism of cationic surfactant is proposed by using molecular simulation technology combined with atomic force microscope and wetting angle observation. Then, the retarding performance and formation damage degree of cationic surfactant are studied by dynamic/static retarding performance test and damage evaluation experiment. The research results show that: ① Carbon chain length affects the interfacial adsorption effect by changing the adsorption form of surfactant molecules. C14TAC can form a vertical dense adsorption layer on the rock surface with the best wetting modification effect. ② The surface of rock is covered by cationic surfactant with interface adsorption, which can increase its hydrophobicity, prevent H+ from contacting the rock surface, control the surface reaction rate, and achieve the purpose of retardation. ③ Compared with conventional acids, cation surfactants have good actionic and static slow performance, the kinetic parameters are reduced by 50 %~60 %, reducing the damage to the carbonate orifice throat. It is concluded that the quaternary ammonium salt cationic surfactant has the advantages of low molecular weight and strong interfacial adsorption ability, while maintaining the retarding ability, and effectively reducing the damage of thickened acid to the formation. This study is helpful to understand the rapid performance of the surfactant, improve the slow acid system, and improve the effect of carbonate reservoir reformation. They are all of positive significance.https://red.magtech.org.cn/fileup/2095-1426/PDF/1675063828351-551518901.pdf|retarded acid|cationic surfactant|carbonate rock|retardation mechanism|reservoir damage |
| spellingShingle | SHEN Xin,GUO Jianchun,WANG Shibin Acidification retardation caused by shielding of cationic surfactants Youqicang pingjia yu kaifa |retarded acid|cationic surfactant|carbonate rock|retardation mechanism|reservoir damage |
| title | Acidification retardation caused by shielding of cationic surfactants |
| title_full | Acidification retardation caused by shielding of cationic surfactants |
| title_fullStr | Acidification retardation caused by shielding of cationic surfactants |
| title_full_unstemmed | Acidification retardation caused by shielding of cationic surfactants |
| title_short | Acidification retardation caused by shielding of cationic surfactants |
| title_sort | acidification retardation caused by shielding of cationic surfactants |
| topic | |retarded acid|cationic surfactant|carbonate rock|retardation mechanism|reservoir damage |
| url | https://red.magtech.org.cn/fileup/2095-1426/PDF/1675063828351-551518901.pdf |
| work_keys_str_mv | AT shenxinguojianchunwangshibin acidificationretardationcausedbyshieldingofcationicsurfactants |