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self-aggregating behavior of poly(4-vinyl pyridine)and the potential in mitigating sand production based onπ-πstacking interaction

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Petroleum Science 2022年第5期19卷 2165-2174页

作者： Jian-Da Li Gui-Cai Zhang Ji-Jiang Ge Wen-Li Qiao Hong Li Ping Jiang Hai-Hua Pei School of Petroleum Engineering China University of Petroleum(East China)Qingdao266580ShandongPR China College of Pharmacy Shandong University of Traditional Chinese MedicineJinan250000ShandongPR China

Unconsolidated sandstone reservoirs are most susceptible to sand production that leads to a dramatic oil production *** this study,the poly(4-vinyl pyridine)(P_(4)VP)incorporated with self-aggregating behavior was proposed for sand migration *** P_(4)VP could aggregate sand grains spontaneously throughπ-πstacking interactions to withstand the drag forces *** influential factors on the self-aggregating behavior of the P_(4)VP were evaluated by adhesion force *** adsorption as well as desorption behavior of P_(4)VP on sand grains was characterized by scanning electron microscopy and adhesion force test at different pH *** result indicated that the pH altered the forms of surface silanol groups on sand grains,which in turn affected the adsorption process of P_(4)*** spontaneous dimerization of P_(4)VP molecules resulting from theπ-πstacking interaction was demonstrated by reduced density gradient analysis,which contributed to the self-aggregating behavior and the thermally reversible characteristic of the P_(4)*** sand stabilization test revealed that the P_(4)VP showed wide pH and temperature ranges of *** production of sands can be mitigated effectively at 20-130℃ within the pH range of 4-8.

关键词： self-aggregating Poly(4-vinyl pyridine) π-πstacking Sand migration control

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