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1、第32卷第9期地質(zhì)通報(bào)Vo1.32.NO.92013年9月GEoLoGICALBULUjTINOFCHINASep.,2013鄂爾多斯盆地富縣一黃陵縣地區(qū)上三疊統(tǒng)延長(zhǎng)組長(zhǎng)6、長(zhǎng)7濁積巖成巖作用馮娟萍,王若谷,尚婷2FENGJuan—ping,WANGRuo—gu。,SHANGTing21.西安科技大學(xué)地質(zhì)與環(huán)境學(xué)院.陜西西安710054:2.延長(zhǎng)石油(集團(tuán))有限責(zé)任公司研究院,陜西西安7100751.CollegeofGeo&gyandEnvironment,Xi'anUniversityofScienceandTechnology,Xi"an710054,Shaanxi,
2、China;2.ResearchInstituteofYanchangPetroleum(group)Co.Ltd.,Xi'an710075,Shaanxi,China摘要:根據(jù)砂巖薄片、鑄體薄片、掃描電鏡、壓汞等分析,對(duì)富縣一黃陵縣地區(qū)上三疊統(tǒng)延長(zhǎng)組長(zhǎng)6及長(zhǎng)7油層組的濁積巖巖石學(xué)特征、成巖作用類(lèi)型及其對(duì)孔隙的影響進(jìn)行了研究。研究結(jié)果表明,該區(qū)長(zhǎng)6及長(zhǎng)7濁積巖主要為細(xì)粒長(zhǎng)石砂巖。壓實(shí)作用、膠結(jié)作用、交代作用和溶解作用是控制濁積巖儲(chǔ)層物性演化的主要成巖作用.其q-壓實(shí)作用和膠結(jié)作用強(qiáng)烈破壞了濁積巖的原生孔隙,它們?cè)斐傻钠骄紫抖葐适Х謩e為23.1%和6.5%,但早成巖階段綠泥
3、石薄膜的形成使?jié)岱e巖的一些原生孔隙得以保存。溶解作用和交代作用有效地改善了濁積巖的孔隙結(jié)構(gòu),從而提高了濁積巖儲(chǔ)層的孔滲條件關(guān)鍵詞:富縣一黃陵縣地區(qū);上三疊統(tǒng)延長(zhǎng)組;濁積巖;成巖作用:儲(chǔ)層物性中圖分類(lèi)號(hào):P534.51文獻(xiàn)標(biāo)志碼:A文章編號(hào):1671—2552(2013)09—1477—07FengJP,WangRG,ShangT.Diagene~sofChang6andChang7turbiditereservoirsoftheUpperTriassicYanchangFormationinFuxianandHuanglingareas,OrdosBasin.Geologi
4、calBulletinofChina,2013,32(9):1477-1483Abstract:Basedonthedataanalysisofthin—section,castinglamella,scanelectronmicroscopeandintrusivemercuryetc,thecharacter-isticsoflithologyanddiagenesisareresearchedontheUpperTriassicChang6andChang7turbiditereservoirsandanalyzedtheirin—fluenceOilthereser
5、voirsqualityofFuxianandHuanglingareasinOrdosBasin.Itisshownthatthesandstonesaregranulearkose,whichwereformedbyfourtypesdiagenesisthatwerecompaction,cementation,metasomatismanddissolution.Itissuggestedthatthecompactionandcementationresultedinlossingprimaryporosityoftheturbidites,andtheporos
6、itylosscausedbycompactionandce—mentationare23.1%and6.5%.respectively.ButduetOthinfilmofchloriteoccurredaroundclastcgranules.a(chǎn)partofprimaryinter-granularporewerepreserved,andalargeofsecondaryporewereformedwithdissolutionandmetasomatism,whichimprovedthereservoirqualityfortheturbidites.Keywor
7、ds:Fuxian—Huanglingarea;YanchangFormationofUpperTriassic;turbidite;diagenesis;reservoirquality對(duì)于濁流的觀察和研究由來(lái)已久。到20世紀(jì)近些年來(lái).在鄂爾多斯盆地延長(zhǎng)組中發(fā)現(xiàn)了大50年代,濁流作為一種重要的沉積物搬運(yùn)和沉積機(jī)量的濁流沉積,并取得了一些油氣突破。但是,近期制得到了國(guó)內(nèi)外廣大地質(zhì)學(xué)家們的認(rèn)可.濁流理論在半深湖一深湖區(qū)濁積砂體中鉆探的眾多工業(yè)油得到了極大的豐富和發(fā)展,并被應(yīng)用于油氣勘探中。井,除少量高產(chǎn)井以外,大部分