Laboratory Evaluation and Field Application of a Type of Surface–ActivePolymer Oil Displacement Agent

摘要

Aimed to obtain a type of oil displacement with both surface activity and polymer performances, this paperbased on mixing initiators at low temperatures, prepared a type of anion–nonionic surface–active polymer oil displacementagent (ANSP–1) by introducing polymerizable anion–nonionic surfmer (ANS–1), acrylamide (AM) and acrylic acid(AA). Structure of ANSP–1 was measured by FTIR. Laboratory studies show that ANS–1 occurs graft copolymerizationwith AM, avoids chromatographic separation, it has better performances on molecular properties, tackifying performance,salt resistance, shear resistance and thermal stability, oil–water interfacial tension can reach 1x10–1 mN/m. Field applicationshows that average recovery ratio of the test wells which used ANSP–1 is 11%, is 6.2% higher than the whole area.