聚驱油田采出液处理生成油泥的组成及形成机理

摘要

采用红外光谱、光电子能谱、扫描电子显微镜等方法对聚合物驱油（聚驱）油田采出液处理过程中生成的两种物理性质存在明显差异的油泥（黏弹油泥和非黏弹油泥）进行组成分析及生成机理分析。实验结果表明：黏弹油泥的FTIR谱图、XPS谱图与实验室模拟生成的黏弹油泥对照样的谱图高度相似，证明黏弹油泥是聚季铵盐型清水剂与阴离子聚丙烯酰胺生成的高含油阴阳离子复合物；非黏弹油泥不含季铵盐成分，而含有酰胺和醚官能团，推测有可能来源于采出液处理剂中的聚醚成分。%In the treatment of polymer-flooding produced water,two types of oily sludge with distinct physical properties, viscoelastic oily sludge and non-viscoelastic oily sludge were generated. Their components and formation mechanism were analyzed by FTIR,XPS and SEM. The results show that:The FTIR and XPS spectra of the viscoelastic oily sludge are much similar to those of the simulated sample generated in lab,which proved that the viscoelastic oily sludge is a kind of oil-containing polyanion-polycation complex generated by polyquaternary ammonium salt cationic water clarifier and anionic polyacrylamide;Comparatively,there is no polyquaternary ammonium group but amide groups and ether groups in the non-viscoelastic oily sludge,which suggest that maybe they come from some components of produced liquid treatment agent,such as polyether ingredients.