原油相对分子质量测定新方法

发布时间：2018-02-24 02:08

本文关键词： 原油相对分子质量碳数分布元素分析　出处：《石油与天然气化工》2017年03期 　论文类型：期刊论文

【摘要】：针对辽河油田沈84-安12块高凝油,利用元素分析仪测定原油碳、氢元素含量及氢碳原子个数比,判定原油主要组成。对原油进行气相色谱分析,采用归一化法得到原油碳数分布。结合原油的元素分析和碳数分布,计算出原油的相对分子质量。实验结果:辽河油田沈84-安12块高凝油的碳、氢元素质量分数之和达99.21%,氢碳原子个数比为2.10,说明此原油以饱和烷烃为主;气相色谱测得原油碳数分布为nC_(12)~nC_(35)之间的烃类组分,分离效果好;由碳元素浓度和碳数分布计算所得辽河油田沈84-安12块高凝油相对分子质量为334.98,由氢元素浓度和碳数分布计算所得数值为332.92,两者相差2.06。
[Abstract]:In view of the high pour point oil of Shen84- an 12 block in Liaohe Oilfield, the main components of crude oil were determined by elemental analysis instrument, the content of carbon and hydrogen elements and the ratio of hydrogen to carbon atoms were determined, and the crude oil was analyzed by gas chromatography. The carbon number distribution of crude oil is obtained by normalized method, and the relative molecular mass of crude oil is calculated by combining the elemental analysis and carbon number distribution of crude oil. The sum of the mass fraction of hydrogen element is 99.21 and the ratio of hydrogen to carbon atom is 2.10, which indicates that the crude oil is mainly saturated alkane, the carbon number of crude oil measured by gas chromatography is distributed in the range of nCC- 12nCCnC ~ (35), and the separation effect is good. The relative molecular weight of high condensate oil of Shen84- an 12 block in Liaohe oilfield is 334.98, and that of hydrogen concentration and carbon number distribution is 332.92, the difference between them is 2.06.
【作者单位】：中国科学院大学;中国科学院渗流流体力学研究所;中国石油勘探开发研究院廊坊分院;中国石油机关服务中心北京华油科隆开发公司;
【分类号】：TE622

【参考文献】