期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2020
卷号：474
期号：5
页码：1-6
DOI：10.1088/1755-1315/474/5/052098
语种：English
出版社：IOP Publishing
摘要：Cations such as Ca2+, Mg2+, Fe2+ etc. in recycled produced water seriously affect the viscosity and stability of movable gel. Four types of polymers were evaluated in laboratory including comb-shape polymer and hydrophobically associating polymer. By analyzing two types of polymers' molecular structures, it showed that comb-shape polymer was easier to improve its properties by cross-linking reaction, and the viscosity of the hydrophobically associating polymer mostly came from the viscosity of molecular structure. Cross-linking reaction contributed little to the viscosity of hydrophobically associating polymer. The movable gel was prepared in salt water of TDS=2.64×104mg/L by using comb-shape polymer B and modified phenolic resin prepolymer. By introducing rigid benzene ring structure, the salt tolerance and long-term stability were significantly improved. The viscosity of retain rate was more than 70% after 60d under 90°C. Field application of 3 wells showed that qualification rate of preparing movable gel was 100% and oil increment was 3020t.
