Surfactants and Spotting Fluids
Surfactants and Spotting Fluids
Surface-active agents that reduce interfacial tension between oil, water, solids and gas, and can change surfaces from water-wet to oil-wet or vice versa.
- Emulsifiers in OBM/SBM to stabilize water-in-oil emulsions and keep cuttings oil-wet for better lubrication and shale stability
- Spotting fluids – drilling application
- Surfactants in the spotting fluid alter filter-cake and formation wettability, break down the mud cake, and reduce adhesion between pipe and wall so the string can be worked free (used in both land and offshore wells).