文献类型：期刊文献

英文题名：Laboratory studies on a novel salt-tolerant and alkali-free flooding system composed of a biopolymer and a bio-based surfactant for oil recovery

作者：Ge, Meng-Ru[1,2];Miao, Si-Jia[1,2];Liu, Jin-Feng[1,2,3];Gang, Hong-Ze[1,2,3];Yang, Shi-Zhong[1,2,3,4];Mu, Bo-Zhong[1,2,3,4]

机构：[1]East China Univ Sci & Technol, State Key Lab Bioreactor Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem & Mol Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[3]Minist Educ, Engn Res Ctr Microbial Enhanced Oil Recovery, Shanghai 200237, Peoples R China;[4]Shanghai Collaborat Innovat Ctr Biomfg Technol, Shanghai 200237, Peoples R China

年份：2021

卷号：196

外文期刊名：JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING

收录：;EI(收录号：20203309042801);WOS:【SCI-EXPANDED(收录号:WOS:000600808100084)】；

基金：This research was supported by the National Key Research and Development Program of China (No. 2017YFB0308900) and National Natural Science Foundation of China (No. 51574125).

语种：英文

外文关键词：Biopolymer/surfactant formula; Ultra-low interfacial tension; Enhanced oil recovery; Salt-tolerant; Alkali-free

摘要：Alkali/surfactant/polymer (ASP) flooding is one of the most effective tertiary oil recovery technologies. However, the formation of an alkali scale potentially results in the reduction of the formation permeability and pipeline corrosion, which affect its industrial application. Recently, the surfactant/polymer (SP) flooding system in the absence of alkali has received increasing attention. Here, we screened a high-yielding strain, which is capable of producing salt-tolerant biopolymer. The results of rheological properties evaluation showed that this biopolymer possessed a stable viscosity at high salinities (up to 200 g/L NaCl, 100 g/L Ca2+, and 100 g/L Mg2+) and a wide range of pH (4-11), indicating its superior salt and pH resistance. Based on these properties, a novel salt-tolerant and alkali-free binary flooding system was constructed with this biopolymer and bio-based surfactant newly synthesized in our lab. The ultra-low interfacial tension (IFT) between crude oil and the binary system containing 0.5 wt % biopolymer and 1.00 g/L surfactant could be achieved in the presence of 100 g/L NaCl or 400 mg/L Ca2+. Moreover, it exhibited good resistance to oil sands adsorption, excellent anti-dilution, and ageing stability. These results indicate that the biopolymer produced by the Kosakonia oryzae strain possessed great potential in the construction of an alkali-free SP system for enhanced oil recovery (EOR) in high salinity and high temperature oil reservoirs.