Next month we’ll be exhibiting and presenting at the SPE International Symposium on Oilfield Chemical.
13-15th April 2015
Through an investigative project, summarised in a paper being presented at The Chemical Symposium we are continually exploring new chemistries for commercialisation.
- Time: 15:30 hrs
- Date: 14th April 2015
- Location: Montgomery Ballroom
- Timetable section: 8 – Flow assurance
Development and evaluation of non-ionic polymeric surfactants as asphaltene inhibitors
Asphaltenes are of particular interest to the petroleum industry because of their depositional effect which creates problems for production, storage, transportation and refinery processes. A class of non-ionic polymeric surfactants has been developed to prevent the aggregation of asphaltene colloids in crude oils. A surfactant dosage rate as low as 25 ppm can be used to keep the asphaltenes dispersed at nearly 100%. These polymeric surfactants are made from sustainable and biodegradable raw materials and free of BTEX, other aromatic solvents and phenol formaldehyde resin.
The polymeric surfactants were synthesized with a range of monomers at various ratios and under different conditions. The products were then tested in three crude oils from the USA and Canada (API: 45-11°) to evaluate their performance in a range of systems. The inhibition effect was analyzed with an optical scanning device according to ASTM D7061-06. It was found that the chemical bonding and physical absorption between an asphaltene molecule and the polymeric surfactant played an important role in stabilizing the asphaltene colloids in crude oil. The hydrophobic chain of the polymeric surfactant provided steric hindrance between the asphaltene colloids while the polar groups gave multiple interaction points for bonding and absorption to the asphaltene. Achieving a balance between these aspects of the molecular design has created a new class of polymeric surfactants based on sustainable and biodegradable raw materials which efficiently inhibit the precipitation of asphaltenes from a range of crude oils at low dose rates.
To find out more about the conference please visit the SPE International Symposium on Oilfield Chemical website.