准东三台-北三台地区储层沥青和稠油特征与成因分析  

Characteristics and origin analysis of viscous oil and reservoir bitumen in Santai-Beisantai area

作　　者：路俊刚[1,2] 陈世加[1,2] 王绪龙[3] 王熠[1] 张纪智[1] 石正灏[1] 

机构地区：[1]西南石油大学资源与环境学院,四川成都610500 [2]西南石油大学油气藏地质及开发工程国家重点实验室,四川成都610500 [3]新疆油田分公司,新疆克拉玛依834000

出　　处：《中国石油大学学报（自然科学版）》2011年第5期27-31,50,共6页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：国家'973'项目(2006CB202305);四川省重点学科项目(SZD0414)

摘　　要：根据原油、储层抽提物和烃源岩地球化学特征,对三台-北三台地区储层沥青和稠油成因进行分析,并研究沥青和稠油对勘探的影响。结果表明:该区稠油和储层沥青分布广泛,稠油主要分布在侏罗系和三叠系地层中,沥青主要分布在侏罗系头屯河组及其以上地层中;稠油和储层沥青均表现出严重生物降解的特征,且来源单一,主要来自二叠系平地泉组烃源岩;三台-北三台地区储层沥青和重质稠油主要是低-未成熟阶段的原油遭严重生物降解的结果,中质稠油主要是成熟阶段原油遭中等生物降解或散失所致;研究区源岩生烃高峰期产物并没有遭受严重破坏,具有较好勘探前景,下步勘探应以中细砂岩分布带和构造下倾部位储层为主要目标。According to the geochemical characteristics of crude oil, reservoir bitumen and source rocks, the origin of viscous oil and reservoir bitumen was analyzed. The effects of bitumen and viscous oil on the exploration were researched. The results show that the viscous oil distributes widely in Jurassic and Triassic formation, and the reservoir bitumen distributes mainly in the Toutunhe formation and above the formation. Both viscous oil and reservoir bitumen are suffered from strong biodegradation, and most hydrocarbon components and n-alkanes in oil are loss. The oil and bitumen in the region come mainly from Pingdiquan group source rocks of Permian. The heavy viscous oil and reservior bitumen all derived from the result that the low-maturity crude oil suffered from loss and strong biodegradation. The medium density oil comes from the result that the mature oil suffered from loss and moderate biodegradation. The oil and gas at peak stage is not destroyed seriously, and the later target of exploration should be middle-fine sandstone belt and the downdip part of the Santai-Beisantai uplift.

关 键 词：生物降解 储层沥青 稠油成因 三台-北三台 准噶尔盆地 

分 类 号：TE122.1[石油与天然气工程—油气勘探]