1.    surfactants for recoveries of viscous crude oils 

  For specially thick crude oil  ,we have to use surfactant to improve the thermal recovery performance, this surfactant is  heat resisting foaming agent.

2.    surfactants for recoveries of waxy crude oil 

  In the production of waxy crude oil, it is necessary to prevent and remove wax frequently. The commonly used oil-soluble surfactants are petroleum sulfonates and amine surfactants .

3.    surfactants for modifing clay stability

  Stabilizing clay include two aspects:preventing clay minerals expansion and preventing clay mineral particle migration.To prevent clay expansion mainly use amine salt,quaternary ammonium salts,pyridine salt, imidazoline salt ,etc.

4.    Surfactants  for  acidification measures 

  To improve the acidification performance,it is necessary to add variety of acid solution. Generally use fatty amine hydrochloride, quaternary ammonium salts, non-ionic anionic surfactant  as foaming agent, which can slow down corrosion and deep acidification  

5.    Surfactants for fracturing measures

6.    Surafactants for profile control and water shutoff measures

7.    Water treatment surfactants

  Mainly use amine salts, quaternary ammonium salts, such as BKC, DDAC,etc.The purpose of water treatment include six aspects, corrosion inhibition,scale prevention,oxygen removal,oil removal and solid suspended matter removal.Therefore, it is necessary to use corrosion inhibitor,scale inhibitor,fungicides,deoxidizer, oil remover and flocculant agent.