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ID:33341379
大小:2.32 MB
页数:7页
时间:2019-02-24
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1、10000569/2015/031(04)110107ActaPetrologicaSinica岩石学报长岭凹陷深层天然气藏中CO及CH充注次序的24流体包裹体证据王可勇李剑锋万多韦烈民秦丹鹤常亮WANGKeYong,LIJianFeng,WANDuo,WEILieMin,QINDanHeandCHANGLiang吉林大学地球科学学院,长春130061CollegeofEarthSciences,JilinUniversity,Changchun130061,China20130301收稿,201412
2、30改回WangKY,LiJF,WanD,WeiLM,QinDHandChangL2015ThefluidinclusionevidenceforthechargingsequenceofCO2andCH4inthenaturalgasesreservoirindeeperlevelpartsofChanglingdepressionActaPetrologicaSinica,31(4):1101-1107AbstractCarefulfluidinclusionstudywerecarriedoutonY
3、ingchengFormationofvolcanicrocks,animportantdeepseatednaturalgasreservoirstratainChanglingdepression,theresultsshowedthatthereareabundantcarbonicfluidinclusionsexistedinquartzandcalciteveinletsdevelopedinthissetofvolcanicrocks,therearemainlyCH4andCO2twotypeswer
4、eidentifiedbylaserRamanmicroprobeanalysisoncompositionsofsinglefluidinclusionsPrimaryaswellassecondaryCH4fluidinclusionsmainlyoccurredinveinletcalcite,whileCO2inclusions,however,onlyfoundinquartzveinletsandoccurredmainlyasrandomlydistributedprimaryinclusionsI
5、nsomeveinletquartz,calcitebrecciasthatcontainingCH4inclusionshavebeenfound,thatindicatesquartzveinsformedlaterthancalciteveinsBasedonstudyofpetrologicalaswellascompositionalfeaturesofcarbonicfluidinclusionsdevelopedinYingchengFormationofvolcanicreservoirrocks,
6、weobtainedsomepreliminaryconclusions:thedeepseatednaturalgasfieldsinSongliaobasinweretheresultsofasynchronouschargingofCH4andCO2gases,theinfillingofCH4predatedthatofCO2andprimaryholes/porositiesaswellassecondarycracksdevelopedinvolcanicrocksservedasthemainroute
7、waysforthechargingandaccumulatingofCH4andCO2,etcgasesKeywordsChargingsequenceofCO2andCH4;Fluidinclusionevidence;YingchengFormationofreservoirvolcanicstrata;Changlingdepression摘要对长岭凹陷深层天然气藏储层———营城组火山岩中发育的流体包裹体进行了详细研究,结果表明在火山岩发育的石英、方解石细网脉中均存在较多的碳质流体包裹体,单个包裹体激光拉
8、曼光谱分析结果表明其主要为CO2及CH4两种类型的碳质包裹体。其中方解石细网脉体中发育有原生及次生CH4包裹体,而含CO2包裹体多以原生包裹体产于石英细网脉中。很多含CO2包裹体的石英细脉中发现了含CH4包裹体的方解石脉体的角砾,这就表明石英细脉形成晚于方解石细脉。营城组火山岩储层中CO2及CH4包裹体的产状特征研究表明,松辽盆地深层天然气藏的
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