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《塔北哈拉哈塘地區(qū)奧陶系碳酸鹽巖巖溶層組特征與溶蝕強(qiáng)度分析.pdf》由會員上傳分享,免費(fèi)在線閱讀,更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫。
1、第37卷第5期石油褒騶沾屆Vol_37.No.52015年9月PETROI,El『MGEOLoGY&EXPE刪ENTSep.,2015文章編號:1001—6112(2015)05—0582—09doi:10.11781/sysydz201505582塔北哈拉哈塘地區(qū)奧陶系L工_JL工J碳酸鹽石石溶層組特征與溶蝕強(qiáng)度分析淡永,梁彬,曹建文,張慶玉,郝彥珍,李景瑞,(1.成都理工大學(xué)沉積地質(zhì)研究院,成都610059;2.中國地質(zhì)科學(xué)院巖溶地質(zhì)研究所,廣西桂林541004;3.國土資源部/廣西壯族自治區(qū)巖溶動力學(xué)重點(diǎn)實(shí)驗(yàn)室,廣西桂林5410
2、04)摘要:塔北哈拉哈塘地區(qū)奧陶系多個層位均發(fā)育巖溶縫洞型儲層。對鉆井巖心系統(tǒng)采樣測試分析,總結(jié)了哈拉哈塘地區(qū)不同地層的巖石類型及其縱向組合發(fā)育特征。不同類型碳酸鹽巖溶蝕試驗(yàn)研究發(fā)現(xiàn),泥質(zhì)含量及Mgo含量對巖石可溶性具有影響,溶蝕強(qiáng)度為純顆粒石灰?guī)r>>白云質(zhì)灰?guī)r>白云巖>泥灰?guī)r。以此為基礎(chǔ)進(jìn)行層組劃分,將奧陶系碳酸鹽巖劃分為2類3型5個亞型:一間房組及鷹一、二段為灰?guī)r連續(xù)型層組,屬強(qiáng)巖溶層組;良一段,鷹三、四段為灰?guī)r夾云巖亞型,巖溶強(qiáng)度屬中等;其余各層組溶蝕性較弱。實(shí)際鉆井結(jié)果及地震剖面“串珠”發(fā)育情況統(tǒng)計(jì)認(rèn)為,該區(qū)巖溶層組類型控制了
3、縫洞型儲層的發(fā)育。關(guān)鍵詞:溶蝕強(qiáng)度;溶蝕試驗(yàn);古巖溶;縫洞型儲層;奧陶系;哈拉哈塘地區(qū);塔里木盆地中圖分類號:TEl22.2文獻(xiàn)標(biāo)志碼:ACharacteristicsandsolutionintensityofkarstformationsinOrdoviciancarbonatesintheHalahatangareaofthenorthernTarimBasinDanYong一,LiangBin,CaoJianwen,ZhangQingyu,HaoYanzhen,LiJingrui’。(1.InstituteofSediment
4、aryGeology,ChengduUniversityofTechnology,Chengdu,Swhuan610059,China;2.InstituteofKarstGeology,ChineseAcademyofGeologicalSciences,Guilin,Guangxi541004,China;3.KarstDynamicsLaboratory,Min~tryofLandResources/GuangxiZhuangzuAutonomousRegion,Guilin,Guangxi541004,China)Abstra
5、ct:FracturedandvuggyreservoirswerefoundinseveralOrdoviciancarbonateformationsintheHalahatangareaofthenorthernTarimBasin.Thelithologyofdifferentformationsandtheirverticaldistributionwerestudiedbasedonmicroscopicobservationsandgeochemicaltestingofcoresamples.Dissolutionte
6、stsofdifferenttypesofcarbonatesshowedthatthecontentsofargillaceousmatterandMgOcouldinfluencecarbonatesolubility.Thein—tensityofdissolutiondecreasedfrompurelimestones,dolomiticlimestones,dolomitestomuddylimestones.TheOrdoviciancarbonateswereclassifiedintotwoclasses,three
7、typesandfivesubtypes.TheYijianfangFormationandthefirstandsecondmembersoftheYingshanFormationarecontinuouslimestoneswithstrongkarstification.ThefirstmemberoftheLianglitageFormationandthethirdandfourthmembersoftheYingshanFormationaredolomiticlimestoneswithmediumkarstifica
8、tion.Theotherformationswereweaklykarstified.Drillingresultsandthepresenceof“stringedbeads”onseismicprofilesind