简介:白垩纪碳酸盐存款在伊朗的西北是更加广泛地分布式的并且形成大多数沉积单位与尖不顺从在这些单位上扔了的区域和不同新生代的paleohighs。西北的伊朗的白垩纪stratigraphic单位能被划分成三个主要范畴:碎屑状的、浅碳酸盐并且远洋。碎屑状的外形包括集团企业,角砾岩和有细密纹理的碎屑状的组和碳酸盐外形由公海(A),酒吧(B),泻湖(C),和潮汐的公寓的microfacies的系列组成。有不同踪迹石块的相对深的碳酸盐存款也是在伊朗的西北的白垩纪沉积环境的更深的部分的指示。与狭窄的Neotethys海洋(Khoy-Zanjan)的扩大的参考,架边缘Neotethys海洋的沉积环境能为Azarshahr大不里士区域被假定,在Varaghan的海岸的flysch和clastics外形在此随深度的增加向北部分扔了。由在现在的学习期间使用不同沉积外形的狭窄的Neotethys海洋的扩大上的调查被看作在伊朗和中东的西北的区域完成白垩纪时间的paleogeographic数据的重要的步。
简介:Fluidinclusionsinmineralsfilledinporesofreservoirrockscanbeusedasagoodindicatorofporegenesisanddevelopmentsoastoshedlightonoilgeneration,migrationandaccumulation.TherelationshipbetweenporeevolutionandoilgenerationhasbeenestablishedbasedonfluidinclusionstudiesontheLowerOrdoviciancarbonatereservoirstrataintheOrdosBaisn,NorthwestChina.Sevenstagesofporositydevelopmentcanberecogmized.i.e.,thepenecontemporaneous,theearlyandmiddle-latediagenetic,thesupergene,theearly,middleandlatere-buryingstages.Thedissolutionporesanfissuresformedinthesupergeneandmiddle-latereburyingstageandthestructuralfracturesformedinthelatere-buryingstageconstitutethemajortrapsofoilandgas.ThemajorphaseofoilmigrationandaccumulationtookplacebetweenLateJurassicandCretaceous,Correspondingtothemiddleandlatere-buryingstages.ThegenerationandaccumulationofoilcanbecloselyrelatedtoYenshaniantectonics.
简介: <正> 1IntroductionAlkalinelakesarewidelydistributedintheareaoftheQinghai-TibetPlateau.Mostofthesaltlakesarefamousfortheirhighconcentrationoflithium,potassium,magnesium,boron(Ma,2000).Inrecentyears,asanewenergymaterial,lithiumanditscompoundsarewidelyusedinthenewarea,suchasaerospaceindustry,nuclear 正>
简介:Usingsupportedmulti-componentzincdicarboxylatecatalyst,poly(1,2-propylenecarbonate-co-1,2-cyclohexylenecarbonate)(PPCHC)wassuccessfullysynthesizedfromcarbondioxide(CO_2)withpropyleneoxide(PO)andcyclohexeneoxide(CHO).Theconversionofepoxidesdramaticallyincreasedupto89.7%(yield:384.2gofpolymerpergofZn)withincreasingreactiontemperaturefrom60℃to80℃.Theoptimizedreactiontemperatureis80℃.Thechemicalstructure,themolecularweight,aswellasthermalandmechanicalpropertiesoftheresultingterpolymerswereinvestigatedextensively.WhenCHOfeedcontent(mol%)islowerthan10%,thePPCHCterpolymershavenumberaveragemolecularweight(M_n)rangingfrom102×10~3to202×10~3andmolecularweightdistribution(MWD)valuesrangingfrom2.8to3.5.Incontrasttopoly(propylenecarbonate)(PPC),theintroductionofsmallamountofCHOleadstoincreaseintheglasstransitiontemperaturefrom38.0℃to42.6℃.Similarly,themechanicalstrengthofthesynthesizedterpolymerisgreatlyenhancedduetotheincorporationofCHO.TheseimprovementsinmechanicalandthermalpropertiesareofimportanceforthepracticalapplicationofPPC.
简介:ThecontentsanddistributionsofCaCO3,Fe2O3.FeOandfreeFe2O3intheWeinanloesssectionofShaanxiProvinceofChinawereinvestigatedthroughdensesampling.TheresultsshowthatthecontentsofCaCO3andtherationofFe2O3/FeOmaybechosenasproxyindicesfortheprecipitationandtemperaturechangesintheformationtimeofthestrata,respectively.Accordingtothesegeochemicalindices,sixstagesofplaeoclimateevolutionareproposedinthisregionsince142kaB.P.,andsecondaryclimatechangesarediscussedaswellbasedonthecurvesofgeochemicalindices.
简介:Thethreeprojects——“Synthesisofdimethylcarbonatethroughureaalcoholysis”,“CleanprocessandcatalystforMDIproduction”and“Synthesisofdiphenylcarbonatethroughtrans-esterification”——jointlyperformedbyChengduOrganicChemicalCo.,Ltd.,PetroChinaUrumqiBranchCompanyandPetroChinaJilinBranchCompanyhavemetthetargetsspecifiedinthecontractandpassedtheexperts'acceptancecheckorganizedbyPetroChina.Thesethreeprojectsrepresentacleanproductionprocessthatappliesureaordimethylcarbonateinlieuofphosgeneasthefeedstocktomakedimethylcarbonate,
简介:In1997,theTZ-162wellinTazhongareaoftheTarimbasinhitthelowerPaleozoicdolomitereservoiratadepthof5,900m.Thedistributionofthedolomitereservoir,however,wasverydifficulttodelineateduetothecomplexsurfaceconditionsandpoorseismicproperties.High-precisiontransientelectromagneticsounding(TEM)wasconductedandgoodresultsobtainedinthisarea.Thispaperdiscussedtheprinciple,dataprocessingandinterpretationofthismethod.Theresultsofstudyingthedolomitereservoirsdemonstratedtheeffectivenessofthemethodinstudyingthelow-resistancedolomitereservoirsinthehigh-resistancecarbonates.Thismethodshouldbeaneffectiveonetostudyreservoirsinareaswithsimilarphysicalpropertiesaswell.
简介:ThismeetingwasheldinthehistoriccityofDurham,northeasternEngland,8-10^thJuly,with145limestoneloversattendingfromallroundtheworld,somecamefromasfarafieldasAustralia,IndiaandJapan,andtherewere30fromNorthAmerica.ThisseriesofmeetingswasstartedbyRobinBathurstin1959andthefirst8wereheldinLiverpool,whereRobinwaslecturerandthenprofessorofgeology.Theaimhasalwaysbeentohaveasmallfocusedconferencewithplentyoftimefordiscussion.
简介:中央Luconia的碳酸盐,马来西亚,一直在用作烃水库超过25年了。然而,到在中央Luconia的中新世的碳酸盐的生长的广泛的构造事件的关系和影响没足够地被揭示。在这个工作,在中央Luconia的南部的部分的二个碳酸盐平台被用于详细解释和地震基于的结构的恢复。这个工作在中央Luconia和它的协会为碳酸盐生长的解释向新卓见提供了包围构造。这个工作建议到上新世的从迟了的渐新世的三可能的构造进化为在中央Luconia的碳酸盐的生长负责。这些阶段是相等的与预先焦化舞台(晚渐新世早中新世),syn碳酸盐舞台(中间迟了中新世)并且碳酸盐以后的舞台(上新世)。华南海的Rifting和proto南方中国海的subduction被相信为指责在期间的发展负责预先焦化舞台,当古老的Baram线的运动被认为在syncarbonate期间控制正常差错的平行惊人方向时,上演。最后,由于overburden,从prograding三角洲的碎屑状的材料在这个区域为重力的tectonics的影响被看作主要原因的沉淀和压缩,它相应于碳酸盐以后的阶段。
简介:Variousfunctionalgroupshavebeensuggestedtoplayessentialrolesonbiomineralizationofcalciumcarbonate(CaCO3)innaturalsystem.2Dand3DmodelsofregularlyarrangedfunctionalgroupshavebeenestablishedtoinvestigatetheireffectonCaCO3crystallization,Thismini-reviewsummarizestherecentprogressandthefuturedevelopmentisprospected.
简介:基于关于的详细研究岩石学并且免职的geochemical特征和Oxfordian碳酸盐的成岩作用在原子量Darya摇盆,土库曼斯坦,碳和氧同位素被分析。paleoenvironmental进化与保存得很好的原来的碳同位素由样品反映了的结果表演与碳同位素stratigraphic曲线与一致并且与全球海平面的曲线,Mid-Oxfordian宽违反,和积极碳同位素旅行事件几乎一致。继续违反的Mid-Oxfordian不仅在原子量Darya盆为Oxfordian礁石和浅水库的发展打了基础而且为Oxfordian全球违反和礁石和银行和高速度的器官的碳埋葬事件的产生发展提供了一个例子。在diagenetic环境的氧同位素的反应证明micrite石灰石和小粒的石灰石经历了弱diagenetic改变,并且样品大部分保留了原来的海水特征。化成白云石和在烃累积前充满溶液vugs和破裂的热水的方解石的降水在主要控制因素是温度的关上的diagenetic环境发生了,并且diagenetic液体从深热的盐水。在烃累积以后的石灰石的chalkification发生在油矿水系统。
简介:Shinuilan形成的更低的志留纪泥墩,在南部的四川盆定位了,中国,比发生在这个区域的shallow-waterreef-bearing石灰石在更深的水里在开的架背景发展了。更低的志留纪的沉积相的边界和分发在南部的四川盆摇的露头,练习数据和同时期的差错控制了的地震侧面表演的集成。墩看起来在指责的synsedimentary形成的地志的lows发展了,在YangtzePlatform的架上。平均的墩厚度是20m,最大值35m。墩被页岩主要由micrite组成,微生物引起地可能跳了,并且被覆盖。墩顶是优先地dolomitized,与Mg~(2+),来源可能从墩顶的粘粒含量焦化。diagenetic历史的Microfaciesanalysis和重建表明墩顶有更高的孔,并且是煤气的目标;相反,墩核心和手足证明毛孔由方解石水泥的三代充满了,因此有一个低煤气的潜力。