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时间:2020-03-28
《准噶尔盆地春光区块沙湾组原油芳烃特征.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、37巷:=『j2新油地质VOI_37.NO.22016印4JJX1NJIANGPETR0LEUMGEOLOGYAp1.20l6文章编号:1001—3873(2016)02—0138—07DOI:10.7657/XJPG20160203准噶尔盆地春光区块沙湾组原油芳烃特征尹琴a,b,严永新,王勇,贾秀容a,纪甜甜,马荣芳(中国石化河南油田分公司a.勘探开发研究院,郑州450018.b.博士后工作站,河南南阳473132)摘要:为查明准噶尔盆地西北缘车排子地区的油气来源,对春光区块中新统沙湾组40个原油样品进行
2、GC-MS分析,全面系统地研究了芳烃类生物标志物的分布和组成特征,并探讨了其地质地球化学意义。春光区块沙湾组原油中检测到了丰富的芳烃,为判断有机质成熟度、母质类型、油气充注和运移方向提供了依据。春光区块沙湾组原油处于成熟阶段,形成于陆相成油环境,其母质有一定高等植物输入的贡献,且不同类型原油的母质有所差异;根据五甲基萘指数与甲基二苯并噻吩指数比值,研究区沙湾组原油来源于西南和东南2个方向,轻质原油距离烃源区近,油源单一,而中质和重质油距离烃源区较远,中质油为混源油,重质油则为高度降解油。关键词:准噶尔盆地;
3、春光区块;沙湾组;生物标志物;生物降解;芳烃;油气运移中图分类号:TEl12.113文献标识码:AGeochemicalCharacteristicsofAromaticHydrocarbonsinCrudeOilofShawanFormationinChunguangBlock,NorthwesternMarginofJunggarBasinYINQin,YANYongxin,WANGYong,JIAXiurong,JITiantian,MAR0ngfan(SinopecHenanOilfieldComp
4、any,a.Research[nstituteotExplorationandDevelopment,Zhengzhou,Henan450018China;b.PostdoctoralWorkStation,Nanyang,Henan473】32,China)Abstract:Inordertoascertaintheoil—gasorigininChepaiziareainnorthwesternmarginofJunggarbasin,thispaperstudiedthe40crudeoilsampl
5、esfromtheMioeeneShawanfon~nationinChunguangblockofthisbasinusingGC.MSanalysis.andpresentedthedistributionsandcompositionsofaromatichydrocarbonsbiomarker,aswellastheirgeologicalandgeochemicalimplications.Thereareabundantaromat—ichydrocarbonsdetectedinShawan
6、crudeoil,whichcanberegardedasimportantbasisforjudgementoftheorganicmattermaturity,kero—gentype,hydrocarbonchargeandmigrationdirection.ThestudyshowsthattheShawancrudeoilisinmaturestage,formedincontinentaloilenvironment,anditskerogencontainsacertainextentofi
7、mputhigherplantsandthereexistsomedefereneesamongthemf(】rdi~}erenttypesofcrudeoils.Accordingtotheratioindexandm(4一MDBT)/m(1.MDBT),theShawancrudeoilinthisareaisoriginatedfromWStoESdirections,andcharacterizedbythatthelightcrudeisclosetohydrocarbonsoorcearea,w
8、ithsingleoilsource;theintermediateandheavvoilsarerelativelyfarfromit.theformerismixed0;1.thelatterishigh/ydegradedone.Keywords:Junggarbasin;Chunguangblock;Shawanformation;biomarker;biodegradation;aromatichydr
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