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22420088GEOSCIENCEVol22No4Aug2008陈昭年1,陈晓巍1,王明艳1,毛兴华2(1,100083;2,457001):2008-02-28;:2008-06-07;::(40672087):,,,1963,,Emai:lchen_zn6019@263net:,;,;,2,-,-:;;;:P61813;TE34:A:1000-8527(2008)04-0628-05VolcanicReservoirformingPatternsoftheChaganSaginInnerMongoliaCHENZhaonian1,CHENXiaowei1,WANGMingyan1,MAOXinghua2(1SchoolofEnergyResources,ChinaUniversityofGeosciences,Beijing100083,China;2ZhongyuanOilfieldCompany,SINOPEC,Puyang,Henan457001,China)Abstract:VolcanicreservoiristheexplorationtargetintheChagansag.Establishingthevolcanicreservoirformatingpatternsissignificantforchoosingtargetandforecastingthedistributionofvolcanicreservoir.ThemajorsourcerocksintheChagansagarecomposedofthesecondmemberoftheBayingebiFormationofLowerCretaceous.Therearemanytypesofporespacesinthevolcanicrocks,includingprimarypores,primaryfracture,structuralfracturesanddissolutionporesbroughtoutbylaterdenudationandtectonismlocally.TheredmudstoneinthesecondmemberoftheSuhongtuFormationisthemaincaprock,withthelithologictrapandthestructurallithologiccompositetrapwhicharemadeupofvolcanicreservoirsexisting.Studyingthereservoirformingconditionsandcontrollingfactors,weproposedtwopatternsofvolcanicreservoirforming:thelithologicreservoirformingpatternandthestructurallithologicreservoirformingpattern.Thelatteristhemaintypeofstructurallithologicreservoirformingpattern.Keywords:volcanicreservoir;formationcondition;reservoirformingpattern;Chagansag1,[1],2000km2,3(1)3[2],NENEESN,NENEE2;1Fig1ThedistributionofmajorfaultsanddivisionofstructuralunitsintheChagansag216![3],,!,,,,(K1b)(K1s)(K1y)(K2w),2,(1),7,379~642m,50%,,,,11,345,[4]2213,[1],6294:1Table1ThedivisionstratigraphicsequenceoftheChagansag,,(2),,,[4]21(,2002)Fig2DivisionofsourcerockevolutionstagesinwellChacan1(modifiedafterTaoGuoqiang,2002),[4]1,,Ro08%,(Ro13%),650km2,500~700m(3),,055%~093%,∀A#0060%~0084%,104~109mg/g,II1Ro080%~104%,[4-6]3(,2005)Fig3ComprehensiveevaluationofthesecondmemberreservoirofBayingebiFormationintheChagansag(modifiedafterZhongyuanOilfieldCompany,2005)22,10%,001∃10-3~164∃63020084Fig4ThemajorsecondaryporetypesofvolcanicrockintheChagansag10-3m2,,,,,,,[7-8],,,[2,9-10],(4(a))A,,[7],,(4(b));,,,,,[7]232:,,,[2,4]331(1)-,,[11],,,,-,(1);,,,32,,2[11-12]321岩性成藏模式(5(a)),6314:5Fig5ThevolcanicreservoirformingpatternsintheChagansag,;,,,,,,,322构造-岩性成藏模式∀#-(5(b)),,,,,∀#,4(1),;;,(2)2:-,-:[1],,.[J].,2002,23(2):166-168.[2],,.-[J].,2002,24(4):296-300.[3],.[J].,2008,22(4):495-504.[4].[J].,2002,16(1):66-70.[5].[J].,2000,21(3):249-251.[6],,,.[J].,2001,28(6):23-27.[7].[M].:,1999:69-70.[8],,.[J].,2007,34(3):528-532.[9],.[J].,1996,10(3):390-396.[10]MitraS.Geometryandkinematicevaluationofinversion[J].AAPGBulletin,1993,77(7):1159-1191.[11],.[J].,2002,41(3):363-366.[12],,,.[J].,2003,10(1):31-32.6322008