东濮凹陷西斜坡地区原油成熟度  

Oil Maturity in West Slope Area of Dongpu Sag

作　　者：李林强[1] 林壬子[1] 

机构地区：[1]石油大学资源与信息学院,北京102200

出　　处：《新疆石油地质》2005年第1期44-46,共3页Xinjiang Petroleum Geology

摘　　要：胡状集和庆祖集油田是东濮凹陷西斜坡地区的两个主要油田,原油主要分布在长垣断层与石家集断层之间二台阶构造带上,该区原油具有饱和烃含量低、含蜡量高、碳同位素较重的特征。利用GC-MS技术对原油分析结果显示,饱和烃馏分中C29甾烷立体异构体比值、三降藿烷w(Ts)/w(Tm)比值普遍较低,这些参数值与我国不同盆地典型低熟原油分布范围十分相似。芳烃馏分中检出了反映低成熟阶段生物标志物——烷基噻吩、四氢噻吩等含硫化合物及多羟基维生素E系列。综合分析认为,胡状集和庆祖集油田的原油为低成熟原油,而非成熟原油。The crude oils in Huzhuangji and Qingzuji oilfields in west slope area of Dongpu sag are mainly distributed in Ertaijie structural belt between Changyuan (placanticline) fault and Shijiaji fault, with characteristics of low content of saturated hydrocarbons, high content of wax and weight carbon isotope. The GC-MS analysis results show that the isomer ratio of C29 sterane and the ratio of trisnorhopene w(Ts)/w(Tm) are generally low and similar with the distributing scope of typical low maturity of crude in other basins in China. Also, in aromatic hydrocarbons, the biomarkers reflecting low maturity stage, such as alkyl thiophenes, tetrahydronthiophene and dehydroxytocopherol series compounds, are detected. Comprehensive analysis indicates that the crude oils found in Huzhuangji and Qingzuji oilfields are all in low maturity rather than in maturity.

关 键 词：原油分析 庆祖集油田 东濮凹陷 馏分 含蜡量 饱和烃 芳烃 斜坡 构造带 碳同位素 

分 类 号：TE624[石油与天然气工程—油气加工工程] P618[天文地球—矿床学]