生排烃热模拟中页岩生物标志化合物的变化及其地质意义  

Changes of shale biomarkers in thermal simulation of hydrocarbon generation and expulsion and its geological significance

作　　者：何大祥 唐友军 郑彬 傅宁 胡锦杰 莫少武 HE Daxiang;TANG Youjun;ZHENG Bin;FU Ning;HU Jinjie;MO Shaowu(State Key Laboratory of Petroleum Resources and Prospecting,China University of Petroleum,Beijing 100029,China;MOE Key Laboratory of Exploration Technologies for Oil and Gas Resources,College of Resources and Environment,Yangtze University,Wuhan 430100,China;No.2 Gas Production Plant,Qinghai Oilfleld Complany,PetroChina,Dunhuang 736200,China;CNOOC Research Institute Co.,Ltd.,Beijing 100028,China)

机构地区：[1]中国石油大学(北京)油气资源与探测国家重点实验室,北京100029 [2]长江大学资源与环境学院、油气资源与勘探技术教育部重点实验室,湖北武汉430100 [3]中国石油青海油田分公司采气二厂,甘肃敦煌736200 [4]中海油研究总院有限责任公司,北京100028

出　　处：《断块油气田》2020年第6期689-694,共6页Fault-Block Oil & Gas Field

基　　金：国家自然科学基金项目“苯基多环芳烃检测及其石油地球化学意义”(41972148);油气资源与探测国家重点实验室开放基金项目“塔里木盆地深层天然气氦、氩同位素年代积累效应研究”(PRP/open-1710)。

摘　　要：文中采用黄金管生排烃热模拟实验方法,开展了湖相页岩从低熟—成熟—高成熟—过成熟系列的热演化模拟实验。结果表明:页岩热演化阶段中,不同系列的生物标志化合物具有不同的地球化学指示意义;根据正构烷烃ΣC21-/ΣC22+、类异戊二烯烃Pr/Ph的变化特征分析,395~470℃是模拟样品的生油高峰期,对应理论镜质组反射率Ro为0.87%~1.66%;芳烃各参数对于高成熟—过成熟原油成熟度的指示意义较好,其中,甲基菲参数MPI1与原油成熟度的相关性最好,4-MDBT/1-MDBT、苝/苯并[e]芘和苯并荧蒽/苯并[e]芘次之,三甲基萘参数TMNr、四甲基萘参数TeMNr最差;处于成熟阶段的页岩中残留液态烃体积分数较高。因此,在页岩油勘探工作中,应重视处于成熟阶段(Ro分布在0.5%~1.2%)的烃源岩。The simulation experiment on the lacustrine shale of thermal evolution from immaturity to overmaturity was conducted by thermal simulation experimental method of hydrocarbon generation and expulsion in gold tube.The results show that the different series of biomarkers have different significance in all the stages of shale thermal evolution.The n-alkaneΣC21-/ΣC22+values and isoprenoid Pr/Ph variation characteristics indicate that the temperature of the generation peak period is between 395 and 470℃,corresponding to the Ro value of 0.87%-1.66%.The aromatic parameters show better indicating significance of the maturity for high-over mature oil.It is suggested that the methylphenanthrene parameter MPI1 is positively correlated to the oil maturity,4-MDBT/1-MDBT,perylene/benz[e]pyrene and benzofluoranthen/benzo[e]pyrene take the second place,TMNr and TeMNr are poorly correlated to the oil maturity.The mature shale had high residual liquid hydrocarbon content,thus the mature shale should be payed more attention during the exploration of shale oil.

关 键 词：热模拟 芳烃 成熟度 页岩 渤海湾盆地 

分 类 号：TE122[石油与天然气工程—油气勘探]