内蒙古西部额济纳旗祥探8井华力西期风化壳原油地球化学特征  

Geochemical characteristics of Variscan weathered crust crude oil of Xiangtan 8 well in Ejin Banner,western Inner Mongolia

作　　者：曹洁[1] 魏仙样[2] 严小鳙[3] 李玉宏[2] 魏建设[2] 

机构地区：[1]中国地质科学院矿产资源研究所,北京100037 [2]中国地质调查局西安地质调查中心,陕西西安710054 [3]中国石油大学(北京)地球科学学院,北京102249

出　　处：《地质通报》2012年第10期1639-1644,共6页Geological Bulletin of China

基　　金：中国地质调查局国土资源大调查项目<银额盆地及其邻区石炭-二叠系油气远景调查>(编号:1212011120962)

摘　　要：根据对祥探8井华力西末期风化壳原油地球化学特征的分析,原油具有饱和烃含量高,芳烃、非烃、沥青质含量低和全油C同位素轻的特点,生物标志化合物藿烷系列具有C30藿烷含量高,伽马蜡烷含量相对较高等特点,指示生烃母质类型好,沉积环境为高含盐的还原环境,烃源岩演化程度较高。与祥探9井烃源岩生物标志化合物特征一致,指示与石炭系烃源岩具有良好的亲缘关系。Based on an analysis of geochemical characteristics of Variscan weathered crust crude oil from Xiangtan 8 well, the authors hold that the crude oil bears the characteristics of high saturated hydrocarbon, low aromatic, no hydrocarbon and asphaltene, and light carbon isotope of the whole oil, and the hopanoid series of biomarkers bears the characteristics of high C30 hopanoid and relatively high gammacerane. All these features show that the kerogen type of hydrocarbon source rocks is good, the sedimentary environment is a re- ducing environment of high-salt, and the evolution degree of hydrocarbon source rocks is fairly high. The whole characteristics of biomarkers are consistent with the hydrocarbon source rocks of Xiangtan 9 well, suggesting a certain genetic relationship between the crude oil and the Carboniferous hydrocarbon source rocks.

关 键 词：额济纳旗 祥探8井 华力西期风化壳 原油 地球化学特征 

分 类 号：TE122.113[石油与天然气工程—油气勘探]