塔里木油田水溶重烃研究及其应用

采用有机溶剂定量萃取方法,从塔里木油田水中分离得到溶解重烃。通过气相色谱、气相色谱—质谱、稳定碳同位素等分析手段,可鉴定出这些溶解重质烃(>C₇)部分组成,主要为中长链正、异构烷烃,也包括烷基甲苯、烷基环已烷系列,其组成和碳同位素分布范围与油藏中原油类似,表明油田水中溶解重烃的来源及其分布与油藏有着直接的联系。对油田水中溶解有机物的研究,可以获得有关油(气)显示的信息,指示邻近油气藏的存在,判断外来污染情况,并为油气运移、聚集方向和路径的确定提供一种新思路。

The Study on Dissolved Heavy Hydrocarbons of Oilfield Water in Tarim Basin

Dissolved heavy hydrocarbons(>C;) have been separated from Tarim basin's oilfield waters by quantitative extraction of organic solvent. Part constituents of the heavy hydrocarbons have been determined based on GC, GC/MS and carbon stable isotopic analyses, which are mainly middle to long chain n- alkane, i-alkane, some alkyl toluenes and alkyl cyclohexanes. Their constituents are similar to that of oil which suggests that there be direct relationship between the origin and distribution of dissolved heavy hydrocarbon in oilfield waters and oil reservoirs. The study on the dissolved organic compounds in oilfield waters can get the informat ion about oil and gas shows; can be used for indicating the existence of oil or gas reservoir nearly and provide a new idea of traling the direction and path of oil and gas secondary migration and accumulation.