Preparation and Performance Evaluation of Fatty Amine Polyoxyethylene Ether Diethyl Disulfonate for Enhanced Oil Recovery in High‐Temperature and High‐Salinity Reservoirs |
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| Authors: | Yan Zhang Qing You Jichao Fang Yifei Liu Mingwei Gao Hongfu Fan Caili Dai |
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| Affiliation: | 1. School of Energy Resources, China University of Geosciences, Beijing, China;2. School of Petroleum Engineering, China University of Petroleum, Qingdao, China |
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| Abstract: | To enhance oil recovery in high‐temperature and high‐salinity reservoirs, a novel fatty amine polyoxyethylene ether diethyl disulfonate (FPDD) surfactant with excellent interfacial properties was synthesized. The interfacial tension (IFT) and contact angle at high temperature and high salinity were systematically investigated using an interface tension meter and a contact angle meter. According to the experimental results, the IFT between crude oil and high‐salinity brine water could reach an ultra‐low value of 10?3 mN m?1 without the aid of extra alkali at 90°C after aging. The FPDD surfactant has strong wettability alternation ability that shifts wettability from oil‐wet to water‐wet. The FPDD surfactant with a high concentration also has good emulsion ability under high‐temperature and high‐salinity conditions. Through this research work, we expect to fill the lack of surfactants for high‐temperature and high‐salinity reservoirs and broaden its great potential application area in enhanced oil recovery. |
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| Keywords: | Fatty amine polyoxyethylene ether diethyl disulfonate High temperature and high salinity Interfacial tension Enhanced oil recovery |
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