简介:在野外露头实测、系统采样基础上,结合地球化学分析测试资料,着重讨论了准噶尔盆地南缘二叠系芦草沟组主量元素、微量元素及稀土元素等地球化学特征,在此基础上恢复了研究区二叠系芦草沟组沉积时的古环境,对比了准南与柴窝堡凹陷芦草沟组沉积的差异性。结果表明,柴窝堡凹陷芦草沟组常量元素中Ca,K,Mg和Na相对富集,P相对较少,微量元素比值V/(V+Ni)及V/Cr均低于准南,轻稀土元素相对富集。准南与柴窝堡凹陷芦草沟组优质烃源岩主要发育于生产力较高、水体缺氧的还原环境,但相对于柴窝堡凹陷芦草沟组,准南芦草沟组页岩形成于生产力更高、水体更深且更缺氧的古环境,该环境更有利于总有机碳的形成与保存。
简介:EO-1Hyperion高光谱遥感影像在实际应用中,需对图像进行大气纠正及补偿等预处理,以便获得较好质量的图像。为进一步分析和应用提供保障.笔者运用FLAASH大气校正模型对中国云南香格里拉地区的Hyperion卫星影像进行大气校正,利用图像MNF转换法对光谱曲线进行去噪平滑优化,再对校正前后影像进行遥感影像和典型地物光谱曲线对比分析.结果表明,影像经FLAASH大气校正和MNF平滑后,较好地消除了大气影响和Hyperion高光谱遥感图像的光谱噪声.
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简介:对新疆和静县乔霍特铜矿一带巴音布鲁克组火山岩岩石学、岩石化学、岩石地球化学进行了研究总结,认为该火山岩为钙碱性系列的玄武安山岩-安山岩-英安岩-流纹岩组合,具低TiO2、MgO、高Al2O3,高Fe2O3/FeO比值及富钠贫钾的特点,形成于大洋岛弧环境;在流纹岩中获得(430.33±0.99)Ma的LA-ICP-MS锆石年龄,指示巴音布鲁克组时代为志留纪。
简介:东天山塔克尔巴斯陶组中发现Choristites、ChonetescarbonlferusKeyserling、BrachythyrinastrangwaysiVerneuil、Brachytryhis、Isogramma、Paramuirwoodia和Stenoscisma等腕足化石,组合时代为晚石炭世早期。前人据该组中发现袁氏珊瑚Yuanophyllum将该地层厘定为早石炭世。1∶25万三道岭幅区调项目对该组地层微体化石进行研究,于灰岩中发现蜓Profusulinella和Schubertella;非蜓有孔虫Tetrataxis、Palaeotextularia和Climacammina;介形化石BairdialongicalidaShi等,其组合时代特征与腕足化石一致。据腕足化石、微体化石及植物化石NoeggerathiopsistheodoriTschirkovaetZalessky,将该组地层厘定为晚石炭世早期。据地层接触关系、植物化石Neoggerathiopsis和Calamites及SHRIMPU-Pb年龄,将上覆地层七角井组定为晚石炭世。更多还原
简介:Anovelautomaticseamlessstitchingmethodispresented.Comparedtothetraditionalmethod,itcanspeedtheprocessingandminimizetheutilizationofhumanresourcestoproducegloballunarmap.Meanwhile,anewglobalimagemapoftheMoonwithspatialresolutionof~120mhasbeencompletedbytheproposedmethodfromChang’E-1CCDimagedata.
简介:TheDiscoveryofBalmeisporitesfromtheTaipinglinchangFormationintheJiayinBasin,HeilongjiangandItsSignificanceWANChuanbiao,LIUBenpei,QIAOXiuyun,YANGJianguo,SHANXuanlongandRENYanguang(1.CollegeofEarthScienceofJilinUniversity,Changchun130026;2.CollegeofEarthScienceofChinaUniversityofGeosciences,Beijing100083;3.ExplorationandDevelopmentResearchInstituteofDaqingOilFieldCompanyLtd.,Daqing,Helongjiang163712;4CollegeofEarthandSpaceofPekingUniversity,Beijing100871)
简介:Modelinggeomechanicalpropertiesofshalestomakesenseoftheircomplexpropertiesisattheforefrontofpetroleumexplorationandexploitationapplicationandhasreceivedmuchresearchattentioninrecentyears.Ashale'skeygeomechanicalpropertieshelptoidentifyits'fracibility'itsfluidflowpatternsandrates,anditsin-placepetroleumresourcesandpotentialcommercialreserves.Themodelsandtheinformationtheyprovide,inturn,enableengineerstodesigndrillingpatterns,fracture-stimulationprogramsandmaterialsselectionthatwillavoidformationdamageandoptimizerecoveryofpetroleum.Awide-rangeoftools,technologies,experimentsandmathematicaltechniquesaredeployedtoachievethis.Characterizingtheinterconnectedfracture,permeabilityandporositynetworkisanessentialstepinunderstandingashaleshighly-anisotropicfeaturesonmultiplescales(nanotomacro).Well-logdata,anditspetrophysicalinterpretationtocalibratemanygeomechanicalmetricstothosemeasuredinrocksamplesbylaboratorytechniquesplaysakeyroleinprovidingaffordabletoolsthatcanbedeployedcost-effectivelyinmultiplewellbores.Likewise,microseismicdatahelpstomatchfracturedensityandpropagationobservedonareservoirscalewithpredictionsfromsimulationsandlaboratorytestsconductedonidealised/simplifieddiscretefracturenetworkmodels.Shalescomplexwettability,adsorptionandwaterimbibitioncharacteristicshaveasignificantinfluenceonpotentialformationdamageduringstimulationandtheshort-termandlongtermflowofpetroleumachievable.Manygasflowmechanismsandmodelsareproposedtakingintoaccountthemultipleflowmechanismsinvolved(e.g.,desorption,diffusion,slippageandviscousflowoperatingatmultipleporositylevelsfromnano-tomacro-scales).Fittinghistoricalproductiondataandwelldeclinecurvestomodelpredictionshelpstoverifywhethermodel'sgeomechanicalassumptionsarerealisticornot.Thisreviewdiscussesthetechniques
简介:从储层的微观特征入手,通过对岩石的铸体薄片、扫描电镜、物性等资料分析,结合区域地质特征研究认为:群苦恰克地区东河塘组下段为一套临滨-前滨相砂岩,以细粒石英砂岩、极细.细粒岩屑石英砂岩为主,结构成熟度及成分成熟度高,储集空间组合以残余原生粒间孔+粒内溶蚀孔为主.储层孔隙度一般为4%-14%,平均7.92%,渗透率一般小于0.110^3-1.0×10^-3μm^2,平均为2.41×10^-3μm^2,总体属于Ⅳ-Ⅲ类储层,但在局部井区(群6、群4)存在相对优质的Ⅱ类储层.成岩压实、胶结作用是储层物性的主控因素,压实减孔一般19%-25%,平均达22.3%.胶结减孔量达3%-6%,致密胶结段可达9%-13%.相对优质储层的发育是多种地质因素共同影响作用的结果,其中刚性石英碎屑颗粒(70%-94%)的抗压实作用是基础.早期烃类流体注入及中弱程度的胶结作用是重要因素,粘土矿物薄膜的发育是关键.