西藏伦坡拉盆地原油地球化学特征  

Geochemical Analysis of Oil in Lunpola Basin,Tibet

作　　者：李一腾 叶加仁[1,2] 曹强[1,2] 刘一茗[1,2] 刘中戎[3] 

机构地区：[1]构造与油气资源教育部重点实验室,湖北武汉430074 [2]中国地质大学(武汉),湖北武汉430074 [3]中国石化勘探分公司,四川成都610041

出　　处：《特种油气藏》2016年第3期71-74,154,共4页Special Oil & Gas Reservoirs

基　　金：中国石化勘探分公司"伦坡拉盆地牛堡组沉积储层特征及成藏规律研究"(G0800-14-KK-169);国家自然科学基金项目"残余盆地古流体动力场演化"(40172051)

摘　　要：基于伦坡拉盆地的原油地球化学资料,在原油物性特征归纳和类型划分的基础上,系统分析了原油族组成、碳同位素、轻烃、饱和烃和芳烃等地球化学特征。结果表明:伦坡拉盆地原油存在稠油和常规油2种类型,稠油为常规油遭受轻微或重度的生物降解作用后形成;生油源组成以藻类为主,亦有陆生高等植物输入贡献,母质类型属于腐泥型—腐殖腐泥型,形成于强还原高盐度咸水湖盆环境;原油为低成熟—成熟阶段产物。研究结果为盆地原油的成因与分布认识及油源对比提供了科学依据,具有重要的研究意义。The geochemical data of oil in the Lunpola Basin,physical properties and oil classification are used to systematically analyze the oil group composition,carbon isotope,light hydrocarbon,saturated hydrocarbon,aromatics and other geochemical properties. Research shows that the crude oil in the Lunpola Basin can be classified into 2 categories and heavy oil is generated by slight to severe biodegradation effect on conventional oil. The oil sources are dominated by algae and part contribution of terrestrialhigher plants. The parent material is considered as sapropelic-humic-sapropelic type,which generates in strong reduction high salinity salt lake basin environment. The crude oil is considered as the product in low-mature to mature stages.This research with great significance could provide a scientific basis for the oil genesis,distribution and oil-source comparison in this basin.

关 键 词：稠油 生物降解 生物标志化合物 伦坡拉盆地 西藏地区 

分 类 号：TE122[石油与天然气工程—油气勘探]