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1、石油勘探與開(kāi)發(fā)2014年12月PETR0LEUMEXPL0RT10NANDDEVELoPMENTVO1.41No.6681文章編號(hào):1000.0747(2014)06.0681.09DOI:10.11698/PED.2014.06.05塔河油田奧陶系碳酸鹽巖基質(zhì)孔縫型儲(chǔ)集體特征毛毳,鐘建華,一,李勇,王有智2,牛永斌4,倪良田,邵珠福(1.中國(guó)石油大學(xué)(華東)地球科學(xué)與技術(shù)學(xué)院;2中國(guó)石油大慶油田勘探開(kāi)發(fā)研究院;3.中國(guó)科學(xué)院廣州地球化學(xué)研究所;4.河南理工大學(xué)資源環(huán)境學(xué)院;5.國(guó)土資源部海洋油氣資源與環(huán)境地質(zhì)重點(diǎn)實(shí)驗(yàn)室)基金項(xiàng)目:國(guó)家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃(973)項(xiàng)目(2011CB10100
2、1);國(guó)家科技重大專(zhuān)項(xiàng)(2011ZX05014.002—002)摘要:采用巖心觀(guān)察、薄片鑒定、陰極發(fā)光、顯微熒光、掃描電鏡與能譜分析等多種技術(shù)方法,研究塔河油田云斑灰?guī)r基質(zhì)孔縫型油藏儲(chǔ)集體特征。塔河油田云斑灰?guī)r的白云石砂屑團(tuán)塊中賦存大量石油,在中下奧陶統(tǒng)一間房組和鷹山組廣泛分布,厚度大,目前開(kāi)發(fā)的油氣有相當(dāng)一部分來(lái)自于這種灰?guī)r基質(zhì),而不是以往認(rèn)識(shí)的完全來(lái)自于縫洞系統(tǒng)。白云石砂屑團(tuán)塊巖心上表現(xiàn)為不規(guī)則斑狀或綢帶狀分布,在許多層段約占巖心總比表面積的40%,砂屑部分總孔隙面孔率也達(dá)39%左右。砂屑部分為結(jié)晶較好的白云石,白云石晶體直徑主要集中在100~350gm,相當(dāng)于中細(xì)砂級(jí);高壓壓汞測(cè)試結(jié)果顯
3、示砂屑團(tuán)塊儲(chǔ)集物性較泥晶灰?guī)r優(yōu)越很多,孔隙度為12.57%~36.39%。砂屑團(tuán)塊周?chē)p合線(xiàn)和微裂隙極為發(fā)育,密集的縫合線(xiàn)和微裂隙連通了白云石砂屑團(tuán)塊含油單元,使微孔、微縫中的石油能夠連通起來(lái),成為有效的儲(chǔ)集空間。圖15參27關(guān)鍵詞:碳酸鹽巖;基質(zhì)孔縫型儲(chǔ)集體;云斑灰?guī)r;砂屑團(tuán)塊;塔河油田;奧陶系中圖分類(lèi)號(hào):TE122.2文獻(xiàn)標(biāo)識(shí)碼:AOrdoviciancarbonaterockmatrixfractured-porousreservoirsinTaheOilfieldMaoCui,ZhongJianhua,LiYong,WangYouzhi,NiuYongbin,NiLiangtian,S
4、haoZhufu(1.SchoolofGeosciences,ChinaUniversityofPetroleum,Qingdao266555,China;2.ExplorationandDevelopmentResearchInstituteofPetroChinaDaqingOilfieldCompany,Daqing163712,China;3.GuangzhouInstituteofGeochemistry,ChineseAcademyofSciences,Guangzhou510640,China;4.InstituteofResourcesandEnvironmentCollege
5、,HenanPolytechnicUniversity,Jiaozuo454000,China;5.KeyLabofMarineHydrocarbonResourcesandEnvironmentalGeology,MinistryofLandandResourcesofChina,Qingdao266071,China)Abstract:Featuresofporphyriticlimestonematrixfracture-vugreservoirsinTaheOilfieldwasexaminedbycoreobservation,thinsectionidentification,ca
6、thodoluminescence,microscopicfluorescence,scanningelectronmicroscopeandenergyspectrumanalysis.ThickandwidespreadintheLower-MiddleOrdovicianYijianfangandYingshanFormations,sand—elasticmassesintheporphyriticlimestonearerichinoil,quiteaproportionofoilandgasproducedcurrentlyisfromtheirmatrixratherthanco
7、mpletelyfromthefracturecavesysteminthepastunderstanding.Inirregularspotorribbonshapeoncores,dolomiticsand-clasticmassesusuallyaccountforabout40%ofthetotalsurfaceofcoreinmanylayers,arenitesectionhasasu