新型原油萃取剂降黏减阻研究

RESEARCH ON A NEW EXTRACTANT FOR REDUCING VISCOSITY AND RESISTANCE OF CRUDE OIL

DRIVE原油萃取剂是一种新型的以含特殊表面活性剂如氟聚酯类化合物为主的表面活性剂复配物,它可以有效地解决油井因本身胶质、蜡、沥青含量多造成的积垢或油稠无法正常开采、产量下降、作业频繁、区块采油速率低等难题。为验证其增采效果,进行了一系列的室内实验研究,结果表明:DRIVE原油萃取剂可以将稠油均匀降黏、分散成流动稀油,改善原油的异常流变性,并且其剥离油垢的速率快、效果好。成膜特性实验和腐蚀实验结果表明,该原油萃取剂的吸附成膜特性可使颗粒表面的黏附力降低,并且不会对管柱等钢制设备造成严重腐蚀。现场试验结果表明,DRIVE原油萃取剂具有较强的驱油增产效果。

DRIVE oil extractant is a new type of surfactant mixture which mainly contains fluorine polyester complex. It is developed to solve difficult problems, such as descaling, viscosity reduction of crude oil, declining of production and oil recovery rate. A series of tests in laboratory was carried out to study its function and performance. Test results show that this oil extractant can effectively reduce the viscosity of heavy crude, thus the fluidity and rheological property of crude oil are improved, besides, it also can help crude to separate from grease stain and scale quickly. Experiments of film forming and cor- rosion tests show that the characteristic of film forming with this oil extractant could reduce the adhesive force of particle surface; furthermore, this extractant will not cause heavy corrosion of equipment steel parts. The results of field experiments indicate that DRIVE oil extractant shows excellent oil displace-ment efficiency.