Research of Synthesis and Performance of Water Soluble Polyacrylic Acid Stable Foam Agent

The foam flooding oil is of great significance to petroleum exploration, the stability of foam at high temperature is one of key technology. Firstly, we used potassium persulfate as polymerization initiator, lauryl mercaptan as chain transfer agent, acrylic acid as monomer, and then Polyacrylic acid (PAA) aqueous solution can be obtained by polymerization. Furthermore, the stabilizing foam system PAA-PEG is prepared by the polyacrylic acid(PAA) and Polyethylene glycol(PEG). Secondly, the foaming system AOS-AES is made by alpha olefin sulfonate(AOS) and vinyl alkyl sodium sulfate(AES).And then, the AOS-AES/PAA-PEG foaming-stabilizing foam system is prepared by the AOS-AES and the PAA-PEG. Its half-life period is determined by national standards to evaluate the stability of foam at the different temperature. The results found that the higher temperature, the better of stabilizing foam. That is, the half-life of AOS-AES/PAA-PEG is 14 times the half-life of AOS-AES at 75℃, but only it is 2.4 times at 30℃.