Functional polymer for enhanced oil recovery

摘要

The present invention relates compositions and methods for enhanced oil recovery. The method is directed to employing a water-soluble The present invention relates compositions and methods for enhanced oil recovery (EOR). The method is directed to employing a water-soluble functional polymeric surfactant (FPS), with a medium IFT value, preferably ranged from about 0.1 to about 15 dyne/cm between water phase containing polymeric surfactant and hydrocarbon phase, for recovery of hydrocarbons from subterranean formations. The FPS solution demonstrates a strong interaction with oil and the great potential to increase both volumetric sweep efficiency and microscopic displacement efficiency in EOR.

主权项

1. A functional polymeric surfactant, comprising:
a) a first repeating monomer unit having a first formula of b) a second repeating monomer unit having a second formula of c) a third repeating monomer unit having a third formula of wherein R0 and R2 are hydrogen or C1-C4 alkyl; wherein the hydrophilic moiety is hydrophilic and selected from the group consisting of anionic, cationic, nonionic, zwitterionic, betaine, and amphoteric ion pair; wherein an oil phase-aqueous phase IFT value of the functional polymeric surfactant is from about 0.1 to about 15 dyne/cm; wherein the content of the second repeating monomer unit is about 2% to about 15% in the functional polymeric surfactant; wherein the second repeating monomer unit is selected from the group consisting of wherein RL is an alkyl, phenyl or derivatives of the alkyl or phenyl; and X−is Cl−or Br−, Ac−,NO3−, or ½SO42−, and G represents a bis-ammonium Gemini surfactant moiety.