简介:Underpressured水库在Huatugou是普遍的()油矿西方在Qaidam盆高举,西方的中国。在在462和1248m之间的深度,在Huatugou油矿的晚第三纪水库的压力仅仅是大约40%~80%静水力学的压力。基于这些underpressured水库的地质的特征的研究,这个工作使用了液体包括分析和数字模拟调查创造这些反常压力的机制并且评估烃分发的特征。结果证明underpressured水库由undercompacted和厚mudrocks是全封上得好的。大规模构造在晚喜玛拉雅的戏高举在在Huatugou油矿的underpressure的产生的一个重要角色。在这个运动的开始,地由于阵发性的石油累积是overpressured。后来,结构高举并且侵蚀导致了多孔的反弹和温度减少,它生产了underpressure。
简介:Asoneofthekeysafetyproblems,themotionperformanceandtouchingseabottomofaFPSOarepaidmuchattentionbytheoceanoilcompanieswhentheFPSOisexposedtosurvivalstormsintheshallow-waterworkingareas.Inthispaper,timedomainnumericalsimulationsarecarriedoutona160kDWTFPSOwithaYokemootingsystemmooredintheBZ25-1oilfieldwithawaterdepthof16.7m.Theresultsarecomparedwiththoseofthecorrespondingmodeltests.Goodagreementshowsthatthetime-domainsimulationscanbeusedtopredicttheperformanceoftheFPSOinshallow-waterreasonably.ItisfoundthatthetouchofseabedbyafullyloadedFPSOoccurredfewtimesundersurvivalstormconditions.Therefore,theFPSOshouldbelessloadedthanthatinthefullyloadedconditionunderthesurvivalstorms.
简介:PickingOutMeatfromCrab'sLegs──TheJiangsuOilfield(Tryingtosqueezeonelastbonanzafromapatchofsoilthat'salreadyteenverykindtoChin...
简介:Therearemanyfactorsaffectingthechemicalcharacteristicsofgroundwaterintheformingprocessofgroundwaterchemicalfields,suchasfresheningduetometeoricwaterleachingdownwards,fresheningduetomudstonecompactionandwaterrelease,concentrationduetoinfiltrationandfresheningduetodehydrationofclayminerals.Asaresult,thegroundwaterchemicalfieldsarecharacterizedbylengthwisestagesandplanarselectivity.Theformerarousesverticalchemicalzonalityofgroundwater.FiveunitscouldbeidentifieddownwardsintheSongliaobasin:(1)fresheningzoneduetodownward-leachingmeteoricwater,(2)concentrationzoneduetoevaporationnearthegroundsurface,(3)fresheningzoneduetomudstonecompactionandwaterrelease,andconcentrationzoneduetocompactionandinfiltration,(4)fresheningzoneduetodehydrationofclayminerals,and(5)filtration-concentrationzone;whereasthelatterdeterminestheplanardivisionofgroundwaterchemicalfields:(1)thefresheningareaduetometeoricwater,asymmetricallyonthemarginofthebasin,(2)thefresheningareaduetomudstonecompactionandwaterreleaseinthecentralpartofthebasin,(3)theleakyarea,whichisatransitionalzone,and(4)leakage-evaporationarea,whichisaconcentrationzone.Inthedirectionofcentrifugalflowscausedbymudstonecompactioninthedepressionarea,themineralizationdegree,concentrationsofNa+andCI-,andsalinitycoefficient(SC)increase,whileconcentrationsof(CO32-+HCO3-)andSO42-,metamorphismcoefficient(MC)anddesulfurationcoefficient(DSC)decrease.However,alltheseparametersincreaseinthedirectionofgravity-inducedcentripetalflows.
简介:Basedonthenon-Darcyflowcharacteristicsofsurfactantfloodinginthelowpermeabilityoilfield,consideringthechangesofthresholdpressureandinfluenceofsurfactantonconvection,diffusion,adsorptionandretention,amathematicalmodelisestablishedforathree-dimensional,two-phase,three-componentsurfactantflooding.Anewtreatmentforthechangesofthresholdpressureandanovelcorrectionmethodfortherelativepermeabilitycurveintheprocessofsurfactantfloodingarederived,whichenhancesthematchingdegreebetweenthemathematicalmodelandfieldpractice.ThemathematicalmodelwasusedtoperformthenumericalsimulationstudyforapilottestofsurfactantfloodinginChao45BlockofDaqingOilfield,aproperinjectionplanwasoptimized.Aftertheoptimizedplanwascarriedoutinoilfield,thedesirableeffects,likepressure-reducing,injectionrateincrease,andtheincreaseofoilrecovery,wereachieved.Theaverageoilincreaseforsinglewellreaches37%,theratioofcosttorevenueisabove1:4,sotheeconomiceffectofscaleispromising.
简介:Thispaper,basedonthefundamentalinorganicchemicalandorganicgeochemicalcharacteristicsofoilfieldwatersfromtheTurpanDepression,presentsthecontentsoforganicmatter,thedistributionoflow-carbonfattyacidsandthecontentsofaromatichydrocarbonsaswellastheirprincipalultravioletabsorptionspectralandfluorescencespectralcharacteristicsinoilfieldwatersfromdifferentoil/gas-bearingareas.Theoil/gasreservoirsinthisdepressionareclassifiedintermsoftheirconservingconditions.Inadditon,thepaperalsodiscussesthechemicalcharacteristicsofoilfieldwatersfromdifferenttypesofoil/gasreservoirswithanemphasisonthecharacteristicsoftheirlocalizationintheγNa/γCa-γNa/γClcorrectiondiagram.OnthisbasisitisattemptedtoexpoundthefundamentalgeochemicalcharacteristicsofoilfieldwatersfromtheTurpanDepressionandtheirgeologicalsignificance.
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简介:鉴于高精确性和可预测性,高分辨率的顺序地层学广泛地被使用了给探索上油并且得到突出的适用的结果。这篇文章拿第一层,上面的秒submember,Shahejie()从Pucheng的形成()是的油矿根据核心日志数据的全面研究在水库学习分析高分辨率的顺序地层学的应用程序的一个例子。第一,这个区域的外形分析揭示沉积沉重的溪流在尺寸减少并且由于蒸发和传播损失消失的发生的相应终端扇子系统。模型包括终端扇子的分成三部分的带状配列进feeder,支流,和basinal地区。第二,electrofacies被记载得好的分析做然后匹配,沉积外形由核心分析定义。在目标区域以内描绘主要沉积外形协会和depositional环境的四electrofacies被定义(隧道,落后沉积物,湖或泛滥平原,和溢出扔)。第三,相关关联基于高分辨率的顺序地层学被建立。由观察基因序列的叠的安排,stratigraphic周期的不同规模能被识别。在规模和持续时间以内,stratigraphic周期作为基因序列,基因顺序集合,和次要的周期被称为。
简介:ChunguangoilfieldisanewfocusoftheexplorationinJunnggarBasinwiththeheavycrudeoildistributinginJurassic,CretaceousandTertiarystrata.Basedontheanalysisofthegeochemistryandfluidinclusioninthereservoirs,thesource,accumulatedperiodandprocessoftheheavycrudeoilreservoirhasbeeninvestigated.Theresultsindicatethattheheavycrudeoilcanbedividedintothreetypesbasedonthedegradationandsources.TheheavycrudeoilwasmainlyderivedfromthePermiansourcerocks,andlatterlymixedbytheheavycrudeoilgeneratedbytheJurassicsourcerocks.Theaccumulatedperiodoftheheavycrudeoilhastwostages.OnewasrangedfromCretaceoustoPaleogeneandtheheavycrudeoilwassourcedfromPermiansourcerocksoftheShawandepressionandlatterlymixedbytheheavycrudeoilgeneratedbytheJurassicsourcerocks.ThesecondperiodwasfromNeogenetopresentandtheheavycrudeoilwasmainlyderivedfromtheJurassicsourcerocks.Combinedwiththegeologicalevolution,theheavycrudeoilaccumulatedprocesshasbeenrecovered.
简介:Hydrocarbonmicro-seepagecancauseoxidationreductionreactionsandproducealteredmineralsinsurfacesedimentsandsoil.Thetypicalalteredmineralsmappingbytheirdiagnosticspectralfeaturesonhyper-spectralimagesisanimportanttoolforthepetroleumexplorationindustry.Inthisstudy,theairbornehyper-spectraldatawereusedtoinvestigatethealteredmineralsinducedbyhydrocarbonmicro-seepagesbyspectralfeaturefitting(SFF)intheloesscoverageareaofXifengOilfield.Theresultsrevealthatthedistributionregionofthealteredmineralsinducedbyhydrocarbonmicro-seepageislargerthantheknownoilfieldexplorationarea.Thepotentialhydrocarbonmicro-seepageregionwasalsorevealedbythedistributionofalteredmineralsbesidestheknownhydrocarbonarea.Afastindexwasproposedbytheabsorptiondepthsofclayandcarbonatemineralsforassessmentofhydrocarbonmicroseepage.Anditgavemuchclearerboundariesforthehydrocarbonmicro-seepageintheloesscoverageareathanthosebythealteredmineralmapping.Inaddition,somefieldsampleswereanalyzedbyX-raydiffraction(XRD)andatomicabsorptionspectrophotometertovalidatetheresults.Withintheextentsofhydrocarbonmicro-seepage,therearelowercontentsofferricironandhighercontentsofcarbonatemineralsinthesesamples.Therefore,itissatisfactorytohavetheairbornehyper-spectraldatatooutlinetheextentsofhydrocarbonmicro-seepageforfurtherhydrocarbonexplorationintheloesscoveragearea.
简介:在Zagros低岬盆扔在期间的Asmari形成渐新世中新世。Lithologically,Asmari形成由石灰石,含白云石的石灰石,白云石,陶土的石灰石,某硬石膏(Kalhur成员)和沙岩(阿瓦十成员)组成。这研究在Dezful湾状之物subzone在Marun油矿从四表面下的节(井Mn-68,Mn-281,Mn-292和Mn-312)基于核心样品的分析以便推断他们的起源和阿瓦十沙岩成员的构造背景。Petrographical数据表明阿瓦十沙岩包括97.5%石英,1.6%长石,和0.9%岩石碎片和所有样品作为石英arenites被分类。起源和阿瓦十沙岩的构造背景用综合petrographic被估计了,geochemical学习。