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时间:2020-06-03
《尼日尔Agadem区块中-新生代储层微观特征分析.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、第32卷第3期河南理工大学学报(自然科学版)Vo1.32No.32013年6月JOURNALOFHENANPOLYTECHNICUNIVERSITY(NATURALSCIENCE)Jun.2013尼日尔Agadem区块中一新生代储层微观特征分析付吉林一,康荣,姜在兴,周春雷,刘康宁(1.中国科学院广州地球化学研究所,广州510640;2.中国地质大学(北京)能源学院,北京100083)摘要:通过岩石薄片、扫描电镜、黏土矿物x衍射、压汞测试分析等资料,从储层的岩性、成岩作用、储集空间等方面,对尼日尔Agadem区块白垩系储层的微观特征进行了研究,并分析了储层发育的控
2、制因素.结果表明,研究区储层以石英细砂岩为主,结构成熟度低一中等;储集空间类型以原生孔隙为主,其次为粒间溶蚀孔隙;储层主要处于中成岩A期阶段,成岩作用弱一中等.沉积作用是储层发育的重要控制因素,最有利的沉积微相为辫状河三角洲前缘水下辫状河道及河口坝.成岩作用对于储层主要表现为建设性作用,白垩系Yogou组上部储层因碱性成岩作用形成次生溶蚀孔隙,储层物性有一定改善.该研究对于加深尼日尔Agadem区块储层的认知具有重要意义.关键词:Agadem区块;古近系-白垩系;储层特征;控制因素中图分类号:TEl22.2文献标识码:A文章编号:1673·9787(2013)03
3、-0285-09Microcharatersofmesozoic-cenozoicreservoirinagademblockofNigerFUJi.1in,,KANGRong,JIANGZai.xing,ZHOUChun—lei,LIUKang—ning(1.GuangzhouInstituteofGeochemistry,ChineseAcademyofSciences,Guangzhou510640,China;2.SchoolofEnergy,ChinaUniversityofGeosciences,Beingfing100083,China)Abstra
4、ct:Thispaperstudiedthemicrocharactersandcontrollingfactorsofamesozoic-cenozoicreservoirinAgademblockofNigerfromaspectssuchaslithology,diagenesisandporetexturebasedonthepetrographicthinsection,scanningelectronmicroscope,andformationtestdataincludingtheandclaymineralX—raydif-fractionand
5、mercuryinjectionexperiment.Theresuhsshowedthatthereservoirinthestudyareaisprimarilycomposedofquartzsandstoneoffinegrainsize,withhighcompositionalmaturityandmoderate—lowtextualma—turity.Primaryintergranularporeisthemainporetype,followedbyintergranualardissolvedpore,intragranu—alardisso
6、lvedpore,cementdissolvedpore,microfractureandmicro—pore.ThediagenesisofacretaceousYes-ervoirisinamiddledigeneticstage.Reservoirdevelopmentismainlycontrolledbythelithologyofparentrocks,depositionanddigenesis.Amongthese,depositionisthekeyfactor,andtheunderwaterdistributarychannelandmout
7、hbararebettersedimentarymicrofaciesinthestudyarea.Generally,diagenesisplaysapos-itiveroleinreservoirdevelopmentandYogouformationofcretaceousismainlyaffectedbyalkalidigenesis.Keywords:AgademBlock;Paleogene—Cretacous;reservoircharacters;controllingfactors收稿日期:2013-01-19基金项目:国家科技重大专项项目(2
8、011zx
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