The interfacial tension,IFT,between aqueous solution of sulfobetaine BS11 in produced water of TSD=3.

The core flooding results by SP and ASP solutions containing a sulfobetaine,BS11,as surfactant at conditions of Daqing oil field are presented.

A new sulfobetaine as sufactant for EOR having lipophilic long-chain alkyl with aromatic ring in middle position is presented and notated as SLB-13.

Octadecyl hydroxysulfobetaine was synthesized under reaction temperature 90 ℃ and reaction time 4 h using isopropanol aqueous solution(volume ratio of isopropanol to water 2∶1) as solvent,from octadecyl tertiary amine and sodium 3-chloro-2-hydroxy propane sulfonate which was prepared using sodium hydrogen sulfite as sulfonating agent under 85 ℃.

The slug structure of natural mixed carboxylates (NMCs)/alkyl sulfo betaines (DSB)/xanthan flooding system formulated in laboratory experimental studies is presented as follows: 10 g/L KCl solution as preflush; 1 500 mg/L xanthan solution as prepad; 1.

The Synthesis and Properties Research of Alkyl-Hydroxyl-Sulfobetaines Viscoelastic Surfactant;

Interaction between dodecyl sulfobetaine and various type surfactants;