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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度分析.pdf》由會員上傳分享,免費在線閱讀,更多相關內容在學術論文-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.成都理工大學沉積地質研究院,成都610059;2.中國地質科學院巖溶地質研究所,廣西桂林541004;3.國土資源部/廣西壯族自治區(qū)巖溶動力學重點實驗室,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研究發(fā)現(xiàn),泥質含量及Mgo含量對巖石可溶性具有影響,溶蝕強度為純顆粒石灰?guī)r>>白云質灰?guī)r>白云巖>泥灰?guī)r。以此為基礎進行層組劃分,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,屬強巖溶層組;良一段,鷹三、四段為灰?guī)r夾云巖亞型,巖溶強度屬中等;其余各層組溶蝕性較弱。實際鉆井結果及地震剖面“串珠”發(fā)育情況統(tǒng)計認為,該區(qū)巖溶層組類型控制了
3、縫洞型儲層的發(fā)育。關鍵詞:溶蝕強度;溶蝕試驗;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文獻標志碼: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