摘要
为进一步厘定车排子凸起新近系沙湾组的油气来源,利用全烃气相色谱和热蒸发烃色谱方法对研究区的原油和油砂进行轻烃组成分析,结果表明车排子凸起北部稠油和南部稀油具有相似的轻烃地球化学特征。其原油母质来源均为腐泥型有机质,轻烃地球化学特征反映原油成熟度均处于成熟阶段。分析不同类型原油具有相似轻烃地球化学特征的原因认为,研究区早期充注原油的轻烃组分多已散失或遭受生物降解作用,现今稠油和稀油中的轻烃组分主要为后期油气充注的结果,主要反映的是二次充注的原油特征。根据对准噶尔盆地烃源岩的研究认为,车排子凸起后期充注的原油应来源于昌吉凹陷二叠系富含低等水生生物母质类型的烃源岩。
In order to clarify the problem of oil-gas source, and by means of the total hydrocarbon chromatography analysis and thermalevaporation hydrocarbon chromatography analysis of crude oils and oil sands, we discover that, there are similar light hydrocarbon geo-chemical characteristics between northern heavy oil and southern light oil. Its original organic matters are all sapropelic and the crudeoils are all mature reflected by light hydrocarbon. Taking account of the fact that the light hydrocarbon characteristics of different typeoil are similar, it is concluded that the light weight fractions of early charged oils are dissipated or degraded, and the light weight frac-tions of present heavy and light oil are mainly from the late charged oils, so the present oils show the characteristic of late charged oils.The source rocks of late charged oil in this area are rich in lower hydrobios. Based on the correlation of source rocks in Junggar Basin,it is concludedthat, the late charged crude oil is derived from Permian sourcerocksof Changji sag.
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2014年第3期10-14,111,共5页
Petroleum Geology and Recovery Efficiency
基金
国家科技重大专项"准噶尔盆地碎屑岩层系大中型油气田形成规律与勘探方向"(2011ZX05002-002)
关键词
轻烃
地球化学特征
成熟度
沙湾组
油气来源
车排子凸起
light hydrocarbon
geochemicalcharacteristic
maturity
Shawanformation
oil and gassource
Chepaizi uplift
