一种新型嵌段类两性表面活性剂的分子结构设计与合成

Molecular Structure Design and Synthesis of a New Block Amphoteric Surfactant

基于气相色谱/质谱联用的方法,对J油田Z井区的原油组分进行了分析,并利用内标法进行了定量测试。设计合成了一种亲油基与原油结构相似的嵌段聚醚类阴–非两性表面活性剂(PPS)。对合成产物及其与脂肪醇聚氧乙烯醚硫酸盐(AES)复配体系的油水界面张力进行了测定,两者的油水界面张力数量级均可达10?2 mN/m。室内驱油试验结果表明,与水驱相比,PPS/AES (1:1)复配体系可提高驱油效率11.1%。2017年,该复配体系应用于216斜-6-6井,累积增油95%。

Based on the GC/MS method, the crude oil composition of Wellblock Z in J Oilfield was analyzed, and the internal standard method was used for the quantitative test. Based on this, a block po-lyether anionic-non-amphoteric surfactant PPS was designed and synthesized. The oil-water in-terfacial tension of the synthetic product and its mixture with the fatty alcohol polyethenoxy ether sulfate (AES) was determined. Both of the oil-water interfacial of PPS and the PPS/AES compound system can reach the order of 10?2 mN/m. The results of indoor simulated oil displacement experiments show that compared with water flooding, the PPS/AES (1:1) compound system can improve the oil displacement efficiency by 11.10%. In 2017, the compound system was used in Well X-6-6 with accumulated oil increment of 95%.