汤原断陷生物标志化合物的分布及其地球化学意义  

Distribution and geochemical significance of biomarker in Tangyuan Depression

作　　者：张相春[1] 王振平[1] 孔令芳[1] 

机构地区：[1]河北工业大学化工学院,天津300130

出　　处：《大庆石油地质与开发》2007年第3期22-26,共5页Petroleum Geology & Oilfield Development in Daqing

摘　　要：主要论述了汤原断陷生物标志化合物及原油(显示)生物标志化合物的分布特征及其地球化学意义,指出汤原断陷内检出丰富的正烷烃、类异戊二烯烷烃、萜类化合物及甾类化合物。源岩及原油(显示)生物标志化合物和原油碳同位素的分布特征研究表明,该区源岩有机质以陆源输入为主,水生生物只在个别样品中占有一定比例;沉积环境普遍存在着弱氧化—弱还原的成煤环境;古气候条件比较湿润;成熟度普遍较低,多数样品尚未进入生油门限。区内的原油(显示)应该来自类型不同的两种源岩,在探井中油显示未见高、过成熟特征,多为低熟到成熟阶段的产物。相对而言,宝泉岭组和白垩系的源岩母质类型较好,而新安村组、乌云组、白垩系的成熟度更有利于生油。This paper demonstrates distribution features and geochemical significance of biomarker in Tangyuan Depression and crude oil, and indicates that, abundant n-alkane, isoprenoid-n-alkane, terpenoid and steride are tested in Tangyuan Depression. Study on source rock and crude oil biomarker in this area （show） and distribution features of carbon isotope in crude oil show that, source rock organic matter is dominated by terrestrial input, aquatic life only exists a certain proportion in particular samples. Depositional environment generally exists week oxidation-week deoxidation forming coal environment, paleoclimate condition is wetter, maturity is universally lower, most of samples do not enter oil threshold. Crude oil in this area should generate from two kinds of source rocks with different types, oil in exploration well never observe that it generates from over mature period, but mostly generates between low-mature and mature period. Contrastively, source rock matrix type in Baoquanling Formation and Cretaceous is better, and while maturity of Xinan- cun Formation, Wuyun Formation, Cretaceous is more favorable for oil generation.

关 键 词：汤原断陷 生物标志化合物 源岩 原油 地球化学 有机质成熟度 沉积环境 

分 类 号：TE132.4[石油与天然气工程—油气勘探]