Alkali/Surfactant/Polymer Flooding in the Daqing Oilfield Class II Reservoirs Using Associating Polymer. (17th July 2013)

• Record Type: Journal Article
• Authors: Feng, Ru-Sen; Guo, Yong-Jun; Zhang, Xin-Min; Hu, Jun; Li, Hua-Bing
• Other Names: Hussien Ibnelwaleed Ali Academic Editor.
• Is Part Of: Journal of chemistry. Volume 2013(2013)
• Publication Date: 2013-07-17
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1155/2013/275943
• Languages: English
• ISSNs: 2090-9063

Abstract

Abstract : Hydrophobically modified associating polyacrylamide (HAPAM) has good compatibility with the Daqing heavy alkylbenzene sulfonate surfactant. The HAPAM alkali/surfactant/polymer (ASP) system can generate ultralow interfacial tension in a wide range of alkali/surfactant concentrations and maintain stable viscosity and interfacial tension for 120 days. The HAPAM ASP system has good injectivity for the Daqing class II reservoirs (100–300 × 10 −3 μ m 2 ) and can improve oil recovery by more than 25% on top of water flooding. In the presence of both the alkali and the surfactant, the surfactant interacts with the associating groups of the polymer to form more micelles, which can significantly enhance the viscosity of the ASP system. Compared with using HPAM (M w = 2.5 MDa), using HAPAM can reduce the polymer use by more than 40%.