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本文利用热解和热蒸发气相色谱分析技术,研究了塔里木轮南油田三叠系油藏剖面上储层的含油性和原油组成变化,发现低孔渗层段油砂的含油性低,原油的成熟度较低,正烷烃呈前峰型分布;高孔渗层段含油性高,原油成熟度较高,正烷烃里后峰型分布;孔渗中等的油砂中含油性和原油组成性质介于两者之间。油藏中不同孔渗层段的这种原油组成非均质性能反映油藏的聚油史。
In this paper, pyrolysis and thermal evaporation gas chromatographic analysis techniques were used to study the changes of oil-bearing and crude oil composition of reservoirs in the Triassic reservoir section of the Lunnan Oilfield in Tarim Basin. It is found that the oil sand in the low- Maturity is low, n-alkanes showed a pre-peak distribution; high-permeability zone high oil content, high crude oil maturity, n-alkane peak distribution; oil and oil porosity in the pore permeability of the nature of the nature of composition Between the two. The compositional heterogeneity of this crude oil in different pore-formation intervals in a reservoir reflects the history of oil accumulation in a reservoir.