This paper reports a new method for the synthesis of phosphorus tagged polymeric scale inhibitors, laboratory based testing to validate these new molecules and their application in oil field reservoirs with comparison to existing commercially available technologies. Existing phosphorus tagged polymeric scale inhibitors are expensive to synthesise and result in low levels of phosphorus making detection difficult. With growing environmental concerns regarding incumbent phosphonate based scale inhibitor chemistries a shift to more environmentally benign polymeric scale inhibitors is required.
A new method for the synthesis of phosphorus tagged polymeric scale inhibitors has been developed. These novel molecules contain a greater level of phosphorus compared to existing techniques. This is achieved by polymerising new novel phosphonate monomers. These monomers may be polymerised or copolymerised with other species to yield phosphonate-functional polymers or oligomers. This results in highly detectable, environmentally friendly molecules with enhanced oilfield reservoir adsorption characteristics. These phosphorus tagged polymers are readily detected by ICP and HPLC techniques offering advantages over conventional phosphonate and polymeric scale inhibitors.
These new phosphorus tagged polymers have been developed as a range of new scale inhibitors to be deployed as down hole squeeze products. Due to their high detection by both polymer and elemental methods this makes them excellent candidates to replace both existing phosphonate and polymer inhibitors. The large range of monomers available allows the chemistries to be tailor made to specific wells and to a range of scaling conditions.
This paper will include laboratory evaluation of these new chemistries with coreflood data in comparison to existing chemistries. This new chemistry shows a significant step forward in the synthetic development of truly detectable phosphorus tagged polymers for an ever evolving industry.