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1、第38卷第2期石油窈籍弛屆Vo1.38,No.22016年3月PETROLEUMGEOLoGY&EXPERIMENTMar.,2016文章編號(hào):1001-6112(2016)02-0211-08doi:10.11781/sysydz201602211江漢盆地潛江凹陷潛江組鹽間頁(yè)巖油儲(chǔ)層礦物組成與脆性特征研究王芙蓉,何生,鄭有恒,侯宇光,吳世強(qiáng)(1.中國(guó)地質(zhì)大學(xué)構(gòu)造與油氣資源教育部重點(diǎn)實(shí)驗(yàn)室,武漢430074;2.中國(guó)石化江漢油田分公司勘探開(kāi)發(fā)研究院,武漢430223)摘要:應(yīng)用x射線(xiàn)衍射分析技術(shù)對(duì)潛江組潛二一四段的頁(yè)巖巖心樣品進(jìn)行了礦物組成與脆性特征研究,以及有機(jī)地球化學(xué)實(shí)驗(yàn)
2、,結(jié)果表明,各樣品具有差異的礦物組成和地球化學(xué)特征。潛二段頁(yè)巖有機(jī)質(zhì)以腐泥型為主,TOC平均值為1.38%,總體處于未熟~低熟階段(為0.26%~0.5%),礦物中蒸發(fā)巖類(lèi)礦物含量高;潛三段頁(yè)巖有機(jī)質(zhì)以腐泥型和腐殖腐泥型為主,TOC平均值為2.53%,總體處于低熟一中等成熟階段(R為O.5%~O.88%),礦物中石英和黏土含量較高;潛四段頁(yè)巖有機(jī)質(zhì)以腐泥型和腐殖腐泥型為主,TOC平均值為O.69%,總體處于中等成熟一成熟范圍(R為O.55%~1-3%),碳酸鹽礦物含量較高。與北美及中國(guó)其他地區(qū)的頁(yè)巖相比.潛江組鹽間頁(yè)巖具有“低黏土礦物、低石英、高碳酸鹽、低脆性礦物”的特征,但
3、其中潛三段的脆性礦物含量較高(平均56%),脆性指數(shù)較大(平均75.3%),具有較好的脆性,是潛江組鹽間頁(yè)巖最有利的勘探層段。關(guān)鍵詞:礦物組成;脆性礦物;頁(yè)巖;儲(chǔ)層;潛江組;潛江凹陷;江漢盆地中圖分類(lèi)號(hào):TEl22.23文獻(xiàn)標(biāo)識(shí)碼:AMineralcompositionandbrittlenesscharacteristicsoftheinter.saltshaleoilreservoirsintheQianjiangFormation,QianjiangSagWangFurong,HeSheng,ZhengYouheng,HouYuguang,WuShiqiang(1.Ke
4、yLaboratoryofTectonicsandPetroleumResourcesofMinistryofEducation,ChinaUniversityofGeoscience,Wuhan,Hubei430074,China;2.ResearchInstituteofExplorationandDevelopment,SINOPECJianghanOilfieIdBranchCompany,Wuhan,肌be430223,C^ina)Abstract:Coresamplesofshalesfromthesecond(Eq2),third(Eq3)andf0urth(E
5、q4)membersoftheQian-jiangFormationintheQianjiangSagwereanalyzedusingX-raydiffraction(XRD)analysestodetermintheirmineralcomposition,brittlenessandgeochemicalcharacteristics.Theresultsshowedthattheshalesfromdifferentformationshavediferentmineralcompositionsandgeochemicalcharacteristics.Thesha
6、lesinEq2havesapropelicorganicmatter.TheTOCcontentaverages1.38%.TheR。valuerangesfrom0.26%一0.5%,indicatinganimmaturetolow—maturitythermalevolutionstage.Evaporiterocksareinhighcontent.TheshalesinEq3havesapropelicandhumic—sapropelicorganicmatter.TheTOCcontentaverages2.53%.TheR。valueranges0.5%一0
7、.88%,indicatingalowtomedium-maturitythermalevolutionstage.Quaazandclaymineralsareinhighcontent.TheshalesinEq4havesapropelicandhumic—sapropelicorganicmatter.TheTOCcontentaverages0.69%.TheR。valueranges0.55%一1.3%.indicatingamedium-maturitytomaturethermalevo