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1、10000569/2015/031(04)110107ActaPetrologicaSinica巖石學報長嶺凹陷深層天然氣藏中CO及CH充注次序的24流體包裹體證據(jù)王可勇李劍鋒萬多韋烈民秦丹鶴常亮WANGKeYong,LIJianFeng,WANDuo,WEILieMin,QINDanHeandCHANGLiang吉林大學地球科學學院,長春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摘要對長嶺凹陷深層天然氣藏儲層———營城組火山巖中發(fā)育的流體包裹體進行了詳細研究,結(jié)果表明在火山巖發(fā)育的石英、方解石細網(wǎng)脈中均存在較多的碳質(zhì)流體包裹體,單個包裹體激光拉
8、曼光譜分析結(jié)果表明其主要為CO2及CH4兩種類型的碳質(zhì)包裹體。其中方解石細網(wǎng)脈體中發(fā)育有原生及次生CH4包裹體,而含CO2包裹體多以原生包裹體產(chǎn)于石英細網(wǎng)脈中。很多含CO2包裹體的石英細脈中發(fā)現(xiàn)了含CH4包裹體的方解石脈體的角礫,這就表明石英細脈形成晚于方解石細脈。營城組火山巖儲層中CO2及CH4包裹體的產(chǎn)狀特征研究表明,松遼盆地深層天然氣藏的