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.
出处
《地质通报》
CAS
CSCD
北大核心
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)
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
Ejin Banner
Xiangtan 8 well
Variscan weathered crust
crude oil
geochemical characteristics
