Synthesis and Properties of Branched Polymer Based on Modified Chitosan for Enhanced Oil Recovery

2019 3rd International Workshop on Renewable Energy and Development

能源学;生态环境科学

Liu, Yanqin^1 ; Lai, Nanjun^1^2^3

School of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, Sichuan

610500, China^1

State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu, Sichuan

610059, China^2

State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai

200433, China^3

关键词: Apparent viscosity;    Branched structures;    Displacement experiments;    Enhanced oil recovery;    Hydrolyzed polyacrylamides;    Mobility control abilities;    Residual resistance factor;    Thickening properties;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/267/2/022038/pdf
DOI  :  10.1088/1755-1315/267/2/022038

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

In this study, chitosan and polyamide-amine(PAMAM) were utilized to prepare a branched polymer based on modified chitosan (HPDCS) for enhanced oil recovery(EOR). The structure of the product was confirmed by FT-IR, 1HNMR and SEM. Compared with hydrolyzed polyacrylamide (HPAM), HPDCS exhibited better thickening properties and shear resistance due to its special branched structure and the flexible molecular chains can be deformed through the pore throat of the porous medium, which can avoid serious damage to the molecular chains. After a 45-hour reaction period with biological enzyme, the apparent viscosity of the HPDCS solution decreased significantly, and the viscosity retention rate was only 67.7%, indicating that the introduction of chitosan in the polymer could improve the biodegradability of polymers to a certain extent. Based on sandpacked tube displacement experiments, the HPDCS could build high resistance factor and residual resistance factor in the corresponding porous medium which indicated that the HPDCS performed excellent mobility control ability. Besides, compared with HPAM, the HPDCS solution of 2000 mg/L showed better oil recovery of 24.12% in the corresponding porous medium, which demonstrated that the branched polymer has a more outstanding EOR ability.