简介:Sponsoredby:ChineseAcademyofSciencesNationalNaturalScienceFoundationofChinaPublishedby:ScienceinChinaPressChairman:ZHOUGuangzhao(ZhouGuangZhao)Editor-in-Chief:SUNShuExecutiveEditors:CHENYongMAZongjinOUYANGZiyuanSUJilanSUNHonglieWANGPinxianZHOUXiuii
简介:由露头,日志和核心数据识别古老的河的词法类型是容易的。然而,隧道的水平分发和几何学能被依靠3-D仅仅鉴别并且预言地震数据。特别,地震地平线切的3-D能在蜿蜒地流的河,支流隧道和低蜿蜒的隧道的沙岩预言起一个重要作用。每个微外形单位包括主要隧道,例如蜿蜒或分叉的隧道,早朝,裂缝隧道,叶舌裂缝展开,泛滥平原等等能被识别。编织隧道沙岩是平面平坦侧面连接沙身体和厚主要隧道带的分发能仅仅从3-D被识别地震数据。因为编织沙岩是无所不在的,他们的出现和分发不需要被预言。通常,煤速度是那么低的它能在煤阶层创造强壮的振幅思考。它因而隐藏振幅作答到吻合能从3-D被识别的隧道沙岩地震倒置数据有时。充满泥的低蜿蜒的河的案例研究与3-D识别了地震数据显示如此的沙身体的规模和width-to-thickness比率是小的,旁边地不连接,并且通常在干燥气候条件下面发生在一把冲积扇子的远或进一步的部分上。有时,沿着地平线的每个思考事件的地震属性的抽取被期望最大化古老的隧道的空间进化的表示。
简介:3Dstructureofthecrustanduppermantleinthestudiedareahasbeenanalyzedfromsurfacewavetomography.Thevelocitydistributionintheuppermostcrustissymmetricalontwosidesofthecentrallineofthesea,andcoincideswiththestructureofcrystallinebasement.TheessentialdifferenceintectonicsbetweentheEastChinaSeaandtheYellowSeamainlyliesinthatthevelocitystructuresoftheirlowercrustanduppermantleareidenticaltothoseofSouthChinaandNorthChinarespectively.Intheuppermantlethereexistsahigh-velocityzonewithanearlyEWstrikefromtheHangzhouBay,China,totheTokaraChannel,Japan,alongaboutthelatitudeof30°N.ItisfoundthatbetweentheEastChinaSeaandtheYellowSeatherearesystematicaldifferencesingeomorphology,geology,seismicity,heatflow,qualityfactorandgravityandaeromagneticanomalies,whichisrelatedtobothleft-lateralsheardislocationandright-lateraltearoftheBenioffzonefromtheHangzhouBaytotheTokaraChannel.ItisinferredthattheEastChinaSeawasformedbyCenozoicback-arcextension.TheboundarybetweentheNorthChinaandSouthChinacrustalblocksstretchesalongthesouthernpiedmontofMts.Daba-Dabie-HangzhouBay-TokaraChannel,andthesubductionzoneattheOkinawatrenchistheeasternboundaryoftheSouthChinacrustalblock.ThemovementsofthePacificplate,IndianplateanduppermantleratherthanthePhilippineplatesubductionhaveplayedadominantroleforthemoderntectonicmovementsinEastAsia.
简介:<正>1IntroductionTheundergroundbrineresourcesdistributingwidelyinSichuanBasin,Chinahavedrawnworldwideattentionduetotheirunusualelementabundanceandexcellentquality.
简介:The2ndMid-EuropeanClayConference(MECC'04)washeldbetween20-24thSeptember2004,inMiskolc,Hungary.Theideatoholdcommonconferenceswasacceptedbythenationalclaygroupsoffourneighbouringcountries,Poland,Slovakia,HungaryandCroatia,duringtheEUROCLAYMeetinginCracow,Poland,in1999.Thefirstconferencewasheldin2001atStaráLesná,intheHighTatraMts.inSlovakia.
简介:本文以高治村滑坡为例,论述了FLAC3D在滑坡稳定性分析评价中的应用。作者首先介绍了FLAC3D的基本原理和主要流程,然后采用摩尔-库伦模型,对高治村滑坡在天然状态和暴雨状态下的变形和位移情况进行了数值模拟,模拟结果直观地显示了该坡体在上述两种状态下的塑性变形及水平方向位移的分布特征,清楚地显示了坡体内潜在的滑动面。文章根据数值模拟结果,对该滑坡的稳定性进行了分析和评价,对该滑坡的变形和破坏形式进行了研究和探讨。通过对该坡体的塑性变形与位移情况分析认为,该滑坡在天然状态下基本稳定;在连续高强度降雨状态下欠稳定,局部失稳滑塌的可能性很大,这与现场调查分析的结果一致。这个结果表明,利用FLAC3D进行滑坡稳定性分析和评价简单、可行,且更加直观、方便,具有传统极限平衡法所无法比拟的优势。
简介:Tarim盆在含碳的时期期间是craton块。除了它的开西南(SWW)加深盆边缘,盆的中央部分被包围由北、东方、南部高举。在盆的大多数部分,有岩石把Biocalcarenite成员,标准石灰石成员和Xiaohaizi形成称为的碳酸盐的三层。今日的Maigeti斜坡,在盆的西南的区域定位了,曾经是到clinoform的paleogeographic碳酸盐站台边缘。在区域的地上凿穿在Xiaohaizi形成揭示超过十米沙滩免职的高精力的biospararenite。这个特征与在中间、北的盆的相等的地平线的低精力的micritic石灰石相当不同。如此的典型碳酸盐沙滩和站台边缘背景显示为礁石生长导致的环境。根据3-D的解释600km2Xinbaza调查上的地震数据,面向在的25km长的堡礁一东方向西,方向与圆丘般的几何学被描出,12km宽南方剧降礁石前面,和36km宽北方剧降backreef。礁石撑墙和轮廓也在连贯,振幅,和频率属性的Xiaohaizi形成以及地平线片的一张isopach地图上被显示出。礁石在矩形的3-D的范围以外扩大地震调查。Xiaohaizi形成的厚度是在中央礁石,和比礁石的外面大的12m的超过60m。堡礁由由狭窄的潮汐的入口分开的片断组成。礁石的邻居主要是bioclasticgrainstones的沙滩免职。由于迟了的宰相和晚第三列的构造运动,堡礁被倾斜蘸在一个SWW方向。它的updip部分被一套反向的差错打破并且错放。不过,与礁石有关的大量烃储备的潜在的stratigraphic水池被期望在它旁边基于实质的礁石规模和最近的地上凿穿指示在未来被成立。
简介:Takinghundredsofpiecesofhazardousgeologicalmaps(1:10000)ofThreeGorgesres-ervoirarea(3GR)asbackground,weestablishregionalthree-dimensional(3D)geo-hazardmodelusingDEM(digitalelevationmodel)superposedsurfaceimagesandgeo-hazardselements.Basedonlandslidesandothergeo-hazardsurveydata,usingimprovedB-REP(boundaryrepresenta-tion)entitydatastructure(two-body3Ddatastructure),wesetup3Dsolidmodelsforeachhazardousbodiesineachhazardousgeologicalmaps.Thenweintegratethetwotypesof3Dmodelswithdifferentscalesfromareatopoint,whicharetheregionalgeo-hazard3Dmodelandthesolidmodelsofeachdisasterbody,inordertoprovideavisualprocessingandanalysisplat-formfordangerpartition,stabilityevaluation,disasterpreventionandcontrol,earlywarningandcommand.
简介:SongkeWellNo.2,oneofthemainpartofthescientificdrillingprojectinSongliaoBasin,whichwasdrilled7018mandacquiredthepartofcorescontinuouslyfromtheLowCretaceoustotheCarboniferousandthePermianfromthe2843mdeep,canbeconsideredasthedeepestcontinentaldrillingprojectinAsia.Aimingatthefeaturesoflongerwellsections,largerdiametersandmultiplespud-insforcoringofSongkeWellNo.2,thisprojectbrokethroughthe"coringinsmalldiameterandreaminginlargediameter"spud-indrilling-completionprocedureswhicharealwaysusedinlarge-diameter-wellcoringforcontinentalscientificdrillingprojectsindomesticandoverseasandthedrillingmethodofshort-singlecylinderroundtripfootage.Atthesametime,"coringinthesamediameterandcompletingdrillingatonesinglediameter"wasachievedatallφ311mmandφ216mmcoringsectionsofmorethanonethousandmeterslong,high-efficientoperationwith"drillinglongfootagewithdrilltoolscombinedinmulticylinders"wasachievedatdeepcoringsection.Fourworlddrillingrecordswerecreatedwhichincludemorethanathousandmeterscontinuouscoringatφ311mm,andthefootageperroundtripfootageatφ311mm,φ216mmandφ152mmisallmorethan30m,allofthesebreakthroughsreducedatleast300daysforthisproject;moreover,consideringthecharacteristicsofformationsthatthegeothermalgradientishighinthedrilledsectionsandtheinside-welltemperatureisover240℃afterdrillingcompletion,aformate-polymerwater-basedmudsystemwasdevelopedbycompoundingattapulgiteandsodiumbentoniteandbyaddingindependentlydevelopedhigh-temperaturestabilizer,whichcanprovidecriticaltechnicalsupportforsuccessfulwellcompletionat7018minthesuper-high-temperatureenvironmentItisthefirsttimethatthewater-basedmudisoperatedattheworkingtemperaturehigherthan240℃inChina;Besides,consideringthehigh-qualityrequirementoncoresimposedbytheproject,themethod"mechanicalcor
简介:Naturalgascontaininghydrogensulphide(H2S)hasbeenfoundinseveralpetroliferousbasinsinChina,suchastheSichuanBasin,BohaiBayBasin,OrdosBasin,TarimBasin,etc.NaturalgaswithhigherH2Scontents(H2S>5%mol.)ismostlydistributedinboththegasreservoirsofDukouhe,Luojiazhai,PuguangandTieshanpo,whichbelongtotheTriassicFeixianguanFormationinthenortheasternSichuanBasinandthoseoftheKongdian-ShahejieformationsinthenortheasternJinxianSagoftheJizhongDepression,BohaiBayBasin.IntheSichuanBasin,theH2Scontentsofnaturalgasaverageover9%andsomecanbe17%,whilethoseoftheBohaiBayBasinrangefrom40%to92%,beingthenoneofthegasreservoirswiththehighestH2Scontentsintheworld.Basedondetailedobservationandsampleanalysisresultsofatotal5000mofcorefromover70wellsintheabove-mentionedtwobasins,especiallysulfurisotopicanalysisofgypsum,brimstone,pyriteandnaturalgas,alsowithintegratedstudyofthegeochemicalcharacteristicsofhydrocarbons,itisthoughtthatthenaturalgaswithhighH2Scontentsresultedfromthermochemicalsulfatereduction(TSR)reactions.Amongthem,thenaturalgasintheFeixianguanFormationresultedfromTSRreactionsparticipatedbyhydrocarbongas,whilethatintheZhaolanzhuangoftheJinxianSagbeingtheproductofTSRparticipatedbycrudeoil.DuringtheconsumptionprocessofhydrocarbonsduetoTSR,theheavyhydrocarbonswereapttoreactwithsulfate,whichaccordinglyresultedinthedrycoefficientofnaturalgasincreasingandthecarbonisotopesbecomingheavier.
简介:以便改进3D的效率近表面的速度模型大楼,我们用地震第一到达的时间开发一个剥去层的方法。在一个普通中点(CMP)集合以内的速度模型被假定被成层进薄层,并且每层的速度与深度线性地变化。最高的层的厚度和速度在一个CMP集合用最小偏移量的第一到达的数据被估计。然后,最高的层被剥去,第二层成为新最高的层。在把最高的层的效果从以前的第一到达的数据移开以后,新第一到达的数据被获得然后过去常估计第二层的参数。以这种方式,速度模型,是被考虑在一个CMP地点,是从顶的造的layer-by-layer到底部。近表面的速度模型当时是的A3D形成了根本使用速度模型CMP地点。在剥去层的方法能习惯于的合成、观察的地震数据表演的测试造好近表面的速度模型因为静态的修正,和它的计算速度比格子断层摄影术的快约百倍。