Screening and Optimization of Demulsifiers and Flocculants Based on ASP Flooding-Produced Water

Processes

Ying Wang¹  Bin Huang²  Jie Wang²  Cheng Fu²  Xiangbin Liu³  Wei Zhang⁴ 

[1] Aramco Asia, Beijing 100102, China;Key Laboratory of Enhanced Oil Recovery, Ministry of Education, College of Petroleum Engineering, Northeast Petroleum University, Daqing 163318, China;Research Institute of Production Engineering, Daqing Oilfield, Daqing 163453, China;Shandong Key Laboratory of Oil-Gas Storage and Transportation Safety, College of Pipeline and Civil Engineering, China University of Petroleum, Qingdao 266580, China;

关键词: emulsifier;    flocculant;    produced water;    ASP flooding;    orthogonal experiment;   

DOI  :  10.3390/pr7040239

来源: DOAJ

【 摘 要 】

The water produced by alkaline−surfactant−polymer (ASP) flooding is difficult to treat due to the presence of residual chemicals. Therefore, research and development of efficient and low-cost methods for the treatment of ASP flooding produced water is necessary. Chemical destabilization is the most common and effective way to treat the produced water. This paper describes an optimization method for demulsification and flocculation. Some demulsifiers and flocculants commonly used in oilfields were screened, compounded, and optimized. Since the effect of treatment using only demulsifier or flocculant to treat the produced water is often not enough to meet the reinjection standard, an orthogonal experiment was carried out to study the demulsification−flocculation method to treat produced water. Five main influencing factors of the oil concentration were investigated. Based on the results of the range analysis and the relationship between the five factors and oil concentration, the order of significant factors was found to be demulsifier dosage > flocculant dosage > settling time > stirring time > stirring intensity, and the optimal demulsification−flocculation treatment conditions were successfully optimized.

【 授权许可】

Unknown