Experimental study of acrylamide monomer polymer gel for water plugging in low temperature and high salinity reservoir. Issue 24 (17th December 2018)

• Record Type: Journal Article
• Authors: Zhang, Yi; Cai, Hongyan; Li, Jianguo; Cheng, Rui; Wang, Meijie; Bai, Xiang; Liu, Yifei; Sun, Yongpeng; Dai, Caili
• Is Part Of: Energy sources. Volume 40:Issue 24(2018)
• Page Start: 2948
• Page End: 2959
• Publication Date: 2018-12-17
• Subjects: Flooding resistance -- monomer polymer gel -- plugging performance -- shear resistance -- Water plugging agent; Natural resources -- Periodicals; Energy consumption -- Periodicals; Energy consumption -- Climatic factors -- Periodicals; Energy conversion -- Periodicals; Energy conversion -- Environment aspects -- Periodicals; Power (Mechanics) -- Periodicals; 333.7905
• DOI: 10.1080/15567036.2018.1514436
• Languages: English
• ISSNs: 1556-7036

Abstract

ABSTRACT: Water plugging agent has been widely applied on oilfield EOR processes for decades. Conventional plugging agents used on reservoirs with low temperature (50°C) and high salinity (28.6 × 10 4 mg/L) encounters with some limitations, such as slow gelling, weak gel strength, and poor instability. To overcome these problems, a novel acrylamide monomer polymer gel with strong gel strength, controllable gelling time and good stability was developed. The gelation processes of the plugging agent system at low temperature and high salinity is studied. The cross-linking reaction process of plugging agent is found to be in three stages: induction stage, rapid cross-linking, and stable stage. The composition of this plugging agent system is optimized: 5~7.5 wt% acrylamide + 0.5~0.75 wt% cross-linking agent + 0.005 ~0.12 wt% retarder + 0.5 wt% initiator. The plugging rate is over 96.5% in high permeability sandpack. It also displays good shear resistance. With the continuous flooding by water after the gel is formed, the polymer gel shows good flooding resistance. It can block the water effectively until 10 PV of injected water.