鄂尔多斯盆地旬邑探区延长组烃源岩及原油地球化学特征  

Source rocks and geochemical characteristics of crude oil of the Yanchang Formation in Xunyi exploration area,Ordos Basin

作　　者：唐建云[1,2] 王志维[3] 也尔哈那提.黑扎提 朱剑兵 陈玉宝[5] 

机构地区：[1]克拉玛依职业技术学院石油工程系,新疆克拉玛依834000 [2]中国石油大学(北京)克拉玛依校区,新疆克拉玛依834000 [3]中国石油新疆油田分公司勘探开发研究院,新疆克拉玛依834000 [4]中国石油胜利油田分公司物探研究院,山东东营257002 [5]陕西延长油田股份有限公司,陕西延安716005

出　　处：《岩性油气藏》2017年第2期107-116,共10页Lithologic Reservoirs

基　　金：国家重大科技专项专题"东西部火山岩储层与鄂尔多斯长6致密砂岩储层成岩演化序列与有利储层评价"(编号:2011ZX05001-002-008);山东省自然科学基金项目"基于时频技术地震层序分析及应用研究"(编号:ZR2010DM016);克拉玛依市科技计划项目"吉木萨尔凹陷二叠系芦草沟组致密储层成岩演化与成藏过程耦合机理"(编号:SK201532)联合资助

摘　　要：为了明确鄂尔多斯盆地旬邑探区三叠系不同层位烃源岩的生烃潜力及延长组油藏油-源等地质问题,针对旬邑探区三叠系延长组是否存在有效烃源岩及石油来源的争议,应用有机岩石学和地球化学对探区内的烃源岩及原油样品进行了分析。结果表明,探区延长组长7烃源岩干酪根类型主要为Ⅰ型和Ⅱ型,其次为Ⅲ型,有机质成熟度中等,为好烃源岩。通过油-油及油-源样品对比分析,认为长6原油、长8原油与长7烃源岩具有相似的沉积环境与成熟度,均为成熟油,其沉积环境为淡水、弱氧化还原环境;生油母质类型具有以藻类生源为主的混合型特征。旬邑探区长7烃源岩对长6和长8油藏的形成具有一定的贡献。There is controversy about effective source rocks of Triassic Yanchang Formation and oil source of Triassic Yanchang reservoir in Xunyi area, Ordos Basin. To clarify the problem, organic petrology and geochemical analysis were used to analyze the samples of source rocks and oil-gas samples. The results show that the type of kerogen of Chang 7 source rock is mainly type I and 11 , followed by type llI , the maturity of organic mat- ter is medium, so it is good source rock. Based on the characteristics of light hydrocarbon, carbon isotope, satu- rated hydrocarbon gas chromatography and the characteristics of biomarker, it is considered that the oil of Chang 6 and Chang 8 have the similar sedimentary environment and maturity with Chang 7 source rock, they all are mid-mature oil, with fresh water and weak redox environment, and the parent material is with hybrid source based on algae. The Chang 7 source rock has certain contribution for the formation of Chang 6 and Chang 8 reser- voirs in Xunyi exploration area.

关 键 词：烃源岩 油-源对比 延长组 旬邑探区 鄂尔多斯盆地 

分 类 号：TE122.1[石油与天然气工程—油气勘探]