Oilfield nanoparticles: Synthesis, characterization and application.

10000Nano-particle return curve:Ca-DTPMPReturn curve of Ca-DTPMPNano-particles in 1%KCl1000DTPMP mg/L1001010.10.1 1 10 100 1000 10000Pore Volume• The return curve of squeeze simulation indicated of the retention andlong term flow back performance of Ca-phosphonate particles;• The flow back phosphonate concentration of higher than 1 mg/L cankeep up to 1700 PV;