稠油HLB值与含水率反相点的关联研究

CORRELATION OF HEAVY OIL HLB VALUE AND ITS MOISTURE INVERTED POINT

采用常规法测定胜利油田8个稠油样品的HLB值,并与羟基吸收峰的面积以及含水率反相点相关联,结果表明:8个稠油含水率反相点、HLB值以及羟基吸收峰面积由大到小的顺序均为辛6斜6>垦东52排222>胜坨3排12斜181>垦东52排225>辛68斜87>单56排11更9>单56排4斜4>草古126,并从界面层的角度进一步解释了出现这种差异的原因,油水界面层由沥青质聚集体、聚集体之间的链节以及极性官能团组成,HLB值越大则聚集体之间的作用力越强、极性官能团越多,稠油的含水率反相点越高,乳化能力越强;其定量关系为:5个普通稠油含水率反相点与HLB值的比值约为6;HLB值与羟基吸收峰面积的比值约为0.01;3个超稠油含水率反相点与HLB值的比值约为5;HLB值与羟基吸收峰面积的比值约为0.015。由此可见,用HLB值解释稠油乳化能力差异是合理的。

HLB values of eight heavy oil samples method, and the correlations between the HLB value area were studied. The results show that HLB value, of Shengli oilfield were measured by conventional and the inverted point and the hydroxyl absorption inverted point and hydroxyl absorption area of the 8 samples have the same order： xin6xie6〉 kendong52pai222 〉 shengtuo3pai12xie181〉 kendong52pai225 〉xin68xie87〉shan56paillgeng9〉shan56pai4xie4〉caoku126. The reason from the perspective of oil- water interface layer is that the oil-water interface layer is made up of asphaltene aggregates and their chains as well as polar functional groups. The higher HLB values of the oil, the stronger the interacting forces and the emulsifying ability, resulting in higher moisture inverted point and more the functional groups. The quantitative relation shows that for the five ordinary heavy oils, the ratio of the inverted point to the HLB value is 6 and the ratio of the HLB value over the absorption peak area of hydroxyl re- spectively is 0.01. While for the three super heavy oils, the above two ratios are 5, and 0. 015, respec- tively. It is concluded that using the HLB value to measure heavy oil emulsifying ability is reasonable.