预览加载中，请您耐心等待几秒...

山东东营博兴洼陷沙四段砂岩粒度分析与沉积环境.docx

预览
1/2
2/2

在线预览结束，喜欢就下载吧，查找使用更方便

下载提示 文本预览

如果您无法下载资料，请参考说明：

1、部分资料下载需要金币，请确保您的账户上有足够的金币

2、已购买过的文档，再次下载不重复扣费

3、资料包下载后请先用软件解压，在使用对应软件打开

山东东营博兴洼陷沙四段砂岩粒度分析与沉积环境 Abstract TheSha4sandstoneoftheDongying-BorxingdepressioninShandongisasignificanthydrocarbonreservoirintheregion.Thegrainsizeanalysisofthesandstonewasconductedtoinvestigateitssedimentaryenvironment.Theresultsrevealthatthesandstonehasaunimodaldistribution,withameansizeof0.24mm.Thesandstoneisfinetomediumgrained,poorlysorted,andmoderatelytowell-rounded.Thehighkurtosisofthesandstoneindicatesthatitwasdepositedinahigh-energyenvironment.Thesedimentaryenvironmentofthesandstonewasinterpretedtobeabraidedriversystemwithadominanthydrologicalflow. Introduction TheSha4sandstoneisasignificanthydrocarbonreservoirintheDongying-BorxingdepressionofShandong.ThesandstoneispartoftheCenozoicsedimentarysequenceintheregionandisthoughttohaveoriginatedfromthedepositionoffluvialsediment.Thegrainsizeofthesandstoneisanessentialcharacteristicthatcanprovideinsightintoitssedimentaryenvironment.ThisstudyaimstoconductagrainsizeanalysisoftheSha4sandstoneandinterpretitssedimentaryenvironment. Methodology ThegrainsizeanalysisoftheSha4sandstonewasconductedusingthelaserdiffractionmethod.AMalvernMastersizer2000wasusedtodeterminethegrainsizedistributionofthesandstone.Asampleofthesandstonewasfirstdriedandsievedtoremoveanylargeparticlesthatmaycausecloggingoftheinstrument.Thesamplewasthendispersedinasolutionofwaterandsodiumhexametaphosphateandagitatedfor30minutes.ThesamplewasthenintroducedintotheMastersizerinstrument,andthegrainsizedistributionwasdetermined. Results ThegrainsizedistributionoftheSha4sandstoneisshowninFigure1.Thesandstonehasaunimodaldistribution,withameansizeof0.24mm.Thesandstoneisfinetomediumgrained,poorlysorted,andmoderatelytowell-rounded.Thehistogramofthegrainsizedistributionhasahighkurtosis,indicatingthatthesandstonewasdepositedinahigh-energyenvironment. Discussion TheresultsofthegrainsizeanalysissuggestthattheSha4sandstonewasdepositedinabraidedriversystemcharacterizedbyadominanthydrologicalflow.Theunimodaldistributionofthesandstonesuggeststhedepositionoccurredinarelati