额济纳旗土壤油气地球化学特征及其意义  

Characteristics and Significance of Soil Oil-Gas Geochemistry in Ejina Qi Region

作　　者：卢进才[1] 魏仙样[1] 李玉宏[1] 魏建设[1] 

机构地区：[1]西安地质矿产研究所,西安710054

出　　处：《新疆石油地质》2009年第1期6-8,共3页Xinjiang Petroleum Geology

基　　金：中国地质调查局国土资源大调查项目;西北地区中小盆地群油气资源远景调查(1212010733506)资助

摘　　要：额济纳旗土壤油气化探试验剖面地球化学研究成果表明,酸解烃化探指标具有高的烃类背景值和强的烃类异常显示,并具有甲烷碳同位素偏重、干燥系数大的特点。烃类指标在剖面上的丰度变化受石炭-二叠系分布及其构造的控制,在石炭-二叠系深埋区,酸解烃甲烷和重烃均具有较高的背景值,并且强异常段与石炭-二叠系局部构造高有良好的对应关系,表明土壤酸解烃异常应为与古生界烃源岩有关的油气赋存信息的反映。The geochemical research of＇soil hydrocarbon geochemical test profile in Ejina Qi region shows that the geochemical indices of acid hydrocarbon display higher hydrocarbon background value and stronger hydrocarbon anomaly, being characterized by heavier methane carbon isotope and bigger drying coefficient. The Carboniferous-Permian distribution and structures control the abundance changes of hydrocarbon indices on the profile. The background values of methane and heavy hydrocarbon are higher in the deep buried area of Carboniferous-Permian, and also the higher anomaly section corresponds well to the local structural highs of Carboniferous- Permian. It shows that the anomaly of soil acid hydrocarbon reflects the information of oil and gas accumulation related to Palaeozoic hydrocarbon source rocks.

关 键 词：额济纳旗 油气化探 烃类异常 古生界 烃源岩 

分 类 号：TE122.3[石油与天然气工程—油气勘探]