关键词: 朝鲜, 安州盆地, 原油, 生物标志物, 煤成油, 湖泊相, 油源对比

Abstract: C and GC-MS characterization of the two crude oils from Anzhou basin,DPR Korea,indicates that they have different origins,The oil from Eocene(E₂) Xinli group was mainlysourced from coal measures of the Xinli group.It shows the following biomarker characteris-tics: Pr/Ph=3.87: BP(bicyc/pentacyclic)=2.09;having abundant bicyclic sesquiterpenesand aromatized sesquiterpanes; higher content of compound X(pentacyclic triterpanebiomarker of higher plant) low contents of hopanoids and steroids,and low values ofsteroidslhopanoids(0.09),(C₂₉ +C₃₀)hopanes/Tm(3.32),TNR-1(0.10) and SF/OF(0.13);and poor in aromatized hopanoids and steroids,These characteristics are very similar tothose of the oils from the Gippsland basin of Australia and the Turpan basin of China,whichare typical coalderived oils.Another oil which is from the lower Cretaceous Longban group,was probably formed inlacustrine sediments.It shows the characteristics such as: Pr/Ph=1.88; BP=0.24; highercontents of hopanoids and steroids;(C₂₉ +C₃₀ hopanes/Tm=11.8; steroids/hopanoids 1(having high content of tri-aromatized steroids);containing abundant 3-methyl-phenan-threne and benzothiophenes; having higher values of TNR=1(1.45) and SF/OF(0.23),etc.These characteristics are similar to that of Jurassic oil from the offshore Korea basin and therelated Jurassic source rocks.

Key words: Korea, Anzhou basin, crude oil, biological marker, coal-formed, oil, lake facies, oil source correlation