資源描述:
《鄂爾多斯盆地隴東地區(qū)長(zhǎng)7段溝道型重力流沉積特征研究.pdf》由會(huì)員上傳分享,免費(fèi)在線閱讀,更多相關(guān)內(nèi)容在行業(yè)資料-天天文庫。
1、礦物巖石地球化學(xué)通報(bào)·非常規(guī)油氣資源·BulletinofMineralogy,PetrologyandGeochemistryVo1.34No.1,Jan.,2015鄂爾多斯盆地隴東地區(qū)長(zhǎng)7段溝道型重力流沉積特征研究付金華,羅順社’,牛小兵,呂奇奇,徐黎明,馮勝斌,李士祥1.低滲透油氣田勘探開發(fā)國(guó)家工程實(shí)驗(yàn)室,西安710018;2.中國(guó)石油長(zhǎng)慶油田公司,西安710018;3.油氣資源與勘探技術(shù)教育部重點(diǎn)實(shí)驗(yàn)室(長(zhǎng)江大學(xué)),武漢430100;4.長(zhǎng)江大學(xué)地球科學(xué)學(xué)院,武漢430100;5.中國(guó)石
2、油長(zhǎng)慶油田公司勘探開發(fā)研究院,西安710018摘要:致密砂巖目前已成為中國(guó)油氣勘探開發(fā)的重點(diǎn)領(lǐng)域。本文通過野外剖面及巖心觀察、測(cè)井資料和深水重力流沉積理論對(duì)就鄂爾多斯盆地隴東地區(qū)長(zhǎng)7段重力流沉積特征進(jìn)行了系統(tǒng)研究,結(jié)果表明該區(qū)發(fā)育砂質(zhì)碎屑流沉積、濁流沉積及滑塌沉積3種成因類型的重力流沉積砂體。砂質(zhì)碎屑流沉積由灰色、褐灰色細(xì)砂巖構(gòu)成,厚度均在0.5In以上,多數(shù)大于1m,塊狀層理發(fā)育,具有近源分布特征;濁流沉積由灰色、深灰色粉砂巖、泥質(zhì)粉砂巖構(gòu)成,單層厚數(shù)度從幾厘米到十幾厘米,具有完整或不完整的鮑
3、馬序列,呈遠(yuǎn)源分布特征;滑塌沉積在研究區(qū)發(fā)育較少。研究區(qū)長(zhǎng)7段重力流沉積砂體橫向連通性較差,縱向連通性較好,具有帶狀展布的特征,為溝道型(非扇型)重力流沉積體系。關(guān)鍵詞:鄂爾多斯盆地;致密砂巖;砂質(zhì)碎屑流沉積;濁流沉積;沉積模式中圖分類號(hào):P611.22A文章編號(hào):1007—2802(2015)O1—0029.09doi:10.3969/j.issn.1007—2802.2015.01.O03SedimentaryCharacteristicsofChannelTypeGravityFlowof
4、theMember7ofYanchangFormationintheLongdongArea,OrdosBasinFUJin.hua,LUOShun.she,¨,NIUXiao—bing,LVQi.qi,XULi·ming’,F(xiàn)ENGSheng-bin’,LIShi—xiang’1.NationalEngineeringLaboratoryforExplorationandDevelopmentofLow—PermeabilityOil&GasFields,Xian710018,China;2.
5、PetroChinaChangqingOilfieldCompany,Xian710018,China;3.LaboratoryofExplorationTechnologiesforOilandGasResources(YangtzeUniversity),MinistryofEducation,Wuhan430100,China;4.SchoolofGeosciencesofYangtzeUniversity,Wuhan430100,China;5.ResearchInstituteofEx
6、plorationandDevelopment,PetroChinaChangqingoieldCompany,Xian710018,ChinaAbstract:TightsandstonestudyhasbeenanimportantresearchfieldintheexplorationanddevelopmentofoilandgasinChina.Inthispaper,thetightsandstonesedimentarycharacteristicsoftheMember7ofY
7、anchangFormationintheLong—dongarea,whichisbelievedtohavegreatpotentialforexplorationanddevelopment,werestudied.Thegravityflowsedi-mentarycharacteristicsintheresearchareawassystematicallystudiedthroughfieldprofileandcoreobservation,loggingdata,anddeep
8、—watergravityflowdepositiontheory.Threegenetictypesofgravityflowdepositedsandbodywerefoundinthisarea,includingsandydebrisflowdeposit,turbiditedepositandslumpdeposit.Thesandydebrisflowdeposit,whichdevelopsmassivebeddinganddistributesnearitssource,isco