电喷雾质谱法分析三次采油用石油磺酸盐

采用电喷雾质谱法测定了胜利油田三次采油用石油磺酸盐样品的分子量分布范围在200～600,数均分子量为488,重均分子量为534.鉴别出烷基苯磺酸盐、烷基萘磺酸盐、烷基茚满磺酸盐等为胜利油田磺酸盐的主要组分.同时对来自胜利、大庆、克拉玛依和玉门4个不同油田的石油磺酸盐进行区别分析.

Analysis of Petroleum Sulfonate in Enhanced Oil Recovery by ESI-MS

In this paper, electrospray ionization mass spectrometry has been used for the rapid analysis of petroleum sulfonates for enhanced oil recovery (EOR). The molecular weight distribution range, average molecular weight and main structure types of petroleum sulfonates can be confirmed. Through examining the ionization efficiency of eight commonly used solvents on petroleum sulfonates, it shows that 50% methanol-water solution has the maximum sensitivity for the ionization of petroleum sulfonates. The results showed that the molecular weight distribution range of the petroleum sulfonates from Shengli Oilfield is from 200 to 600, the number-average molecular weight is 488 and the weight-average molecular weight is 534. The main components of Shengli petroleum sulfonates are alkylbenzene sulfonate, alkylnaphthalene sulfonate and alkylindane sulfonate. A distinguishing analysis for petroleum sulfonates from Shengli, Daqing, Karamay and Yumen oil fields has also been carried out.