摘要
通过对塔里木盆地塔中隆起典型海相原油和吐哈盆地典型煤成油的轻烃组分、Mango参数和成熟度等分析后发现:2类原油轻烃组分含量差异明显,塔中隆起海相油富含正庚烷,吐哈盆地煤成油则富含甲基环己烷;塔中隆起海相油Mango参数K1值分布在0.97～1.19之间,与Mango所报道的结果相一致,而吐哈盆地煤成油的K1值却异常高(1.35～1.66);塔中隆起海相油成熟度参数庚烷值(32.3%～45.4%)和异庚烷值(1.9～3.7)高于煤成油,已处于高成熟阶段,塔中隆起典型海相油的形成温度要明显高于吐哈盆地煤成油。
Based on the results of earlier studies on light hydrocarbons by several researchers, typical marine oils from the Tazhong area in the Tarim basin and typical coal-formed oils from the Turpan basin were selected and analyzed to find the differences of compositional characteristics of light hydrocarbons between the two oil categories and to provide new geochemical cognition for classifying the origin of oils. Through the GC-MS analytic technology, the light hydrocarbons data for two kinds of oils were obtained. （1） Light hydrocarbons of marine oils in the Tazhong area are rich in nC7, and the coal-formed oils from the Turpan basin are rich in MCyC6. （2） The Mango parameter K1 ranges from 0.97 to 1.19 in the marine oils, and it is consistent with the conclusion that Mango reported on light hydrocarbons based on a majority of crude oils data. But the K1 values of the coal-formed oils are particularly high （1.35-1.66） and far greater than marine oils. （3） Heptane values in the marine oils, from 32.3%to 45.4%, and isoheptane values, from 1.9 to 3.7, are respectively higher than the coal-formed oils, which indicates that it is in a highly mature stage. （4） The expulsion temperatures for the coal-formed oils （96.8-102.2℃） are relatively lower than the marine oils （115.3-129.4℃）.
出处
《天然气地球科学》
EI
CAS
CSCD
2008年第1期18-22,共5页
Natural Gas Geoscience
基金
国家自然科学基金项目(编号:40573030)资助
关键词
海相油
煤成油
轻烃
庚烷值
异庚烷值
Mango轻烃参数
Marine oil
Coal-formed oil
Light hydrocarbon
Heptane value
Isoheptane value
Mango parameter.
