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ID:36778482
大小:1.51 MB
页数:9页
时间:2019-05-15
《松辽盆地南部幔源C02与油气充注时序来自含片钠铝石砂岩的证据》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、学兔兔www.xuetutu.com天然乞化第32卷第54期OIL&GASGEOLOGY2011年12月文章编号:0253—9985(2011)06—0873—09松辽盆地南部幔源CO2与油气充注时序来自含片钠铝石砂岩的证据刘立,侯启军,刘娜,杨会东,李福来,于志超(1.吉林大学地球科学学院,吉林长春130061;2.中国石油吉林油田公司,吉林松原138001;3.中国石油吉林油田公司勘探开发研究院,吉林松原138001)摘要:沉积盆地中慢源CO的充注时间是进行CO:一砂岩相互作用以及CO一原油相互作用研究的基础。一般将CO气藏附近火山岩的喷发年龄视为幔源CO,的充注时间,
2、但是,这一思路明显不适合于具有多期火山活动的含油气盆地。通过成岩共生序列和流体包裹体的系统研究,在松辽盆地南部含片钠铝石砂岩中解读出两期油气和一期CO充注记录,其中,第一期和第二期油气充注记录主要以液烃包裹体和气液烃包裹体形式赋存于自生矿物和碎屑矿物的裂隙中,幔源CO,充注的记录为片钠铝石自生矿物和赋存于碎屑矿物裂隙中的含CO包裹体,慢源CO的充注略晚于第二期油气充注或与其大致同时。根据含片钠铝石砂岩的成岩共生序列和流体包裹体研究,结合已有的油气成藏时间和构造裂缝发育时问判断,松辽盆地南部形成片钠铝石的幔源CO的充注时间可能为白垩纪末(明水期末)一古近纪。关键词:充注时序;
3、幔源CO,;油气;含片钠铝石砂岩;松辽盆地南部中图分类号:TEl22.1文献标识码:AChargingtimesequenceofmantleCO2andhydrocarboninsouthernSongliaoBasin:anevidencefromdawsonite·bearingsandstonesLiuLi,HouQijun,LiuNa,YangHuidong,LiFulaiandYuZhichao(1.CollegeofEarthSciences,JilinUniversity,Changehun,Jilin130061,China;2.PetroChinaJil
4、inOilfieldCompany,Songyuan,Jilin138001,China;3.ExplorationandDevelopmentResearchInstitute,PetroChinaJilinOilfieldCompany,Songyuan,Jilin138001,China)Abstract:ChargingtimeofmantleCO2insedimentarybasinsisabasisforstudyinginteractionofCO2-sandstoneandCO2一crudeoil.Generally,eruptionageofvolcani
5、crocksnearCO2reservoirsissupposedtobethechargingtimeofmantleCO2,butthisapproachisobviouslynotsuitabletohydrocarbonbasinswithmulti—stagevolcaniceruption.TwohydrocarbonchargingphasesandoneCO2chargingphasehavebeenidentifiedinthedawsonite—bearingsandstonebythesystematicobservationanddeterminat
6、ionofdiageneticsequenceandfluidinclusionsinSouthernSongliaoBasin.Thefirstandsecondhydrocarbonchargingwererecordedbytheliquidhydrocarbonin—clusionandgas—liquidhydrocarboninclusionwithinfracturesofauthigenicmineralsanddetritalminerals,whilethemantleCO2chargingbythedawsoniteandCO2一bearingincl
7、usionwithinfracturesofdetritalminerals.ThechargingtimeofmantleCO2isslightlylatterthanorapproximatelythesameasthesecondphaseofhydrocarboncharging.Accordingtotheanalysisofdiageneticsequenceandliquidinclusionsindawsonite—bearingsand—stone,andincombinationwiththet
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