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298 个结果
  • 简介:摘要随着超稠油井的大规模开发,油井汽现象逐渐加剧,投产开发的超稠油井分布错综复杂,水平井井数多,直井与水平井错落排列,油井间距小,造成油井汽频繁,且范围广,长距离,多方向,严重的影响了油井开井时率,影响产量及开发效果,针对汽油井管理,通过摸索、整合出系统的、有效的、可持续采用的管理办法和措施。

  • 标签: 油井汽窜 出砂 减少 变频技术
  • 简介:摘要针对油水井出现水淹层、油气枯竭层、套管损坏、套管外通等问题,常利用液体压力挤压灰浆使之进入地层缝隙或多孔地层,或是利用液体输送灰浆在井筒套管内留一定长度的灰浆柱,从而实现封堵封。采油厂经过近年来不断探索,解剖分析每次施工,在优选封堵材料,拓展封堵技术,优化封堵方式方面,总结形成了一定的工作思路,从而达到灰浆封堵封施工规范化,收到了很好的应用效果。

  • 标签: 封堵材料 预堵解堵 封堵方式
  • 简介:摘要纳米材料是材料科学研究的一个热点,其相应发展起来的纳米技术被公认为是21世纪最具前途的科研领域。纳米材料是特征维度尺寸为纳米量级1~100nm的固态超细材料。在催化、光学、磁性、力学等方面具有许多奇异的性能和广泛的应用前景。由于其独特的结构,碳纳米管的研究具有重大的理论意义和潜在的应用价值。

  • 标签: 纳米 碳纳米管 制备 应用
  • 简介:NoImpaseforChina’sDevelopmentJianSongToday,Chinahasamorethan1.2bilionpeople,about22%oftheworld’stotal,whoarefedwiththegrainpr...

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  • 简介:IncreasinglyaWoman'sDisease¥ZhangKonglaiandWangYingAIDSisadeadlysexuallytransmitteddiseasecausedbythehumanimmuno-deficiencyvi...

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  • 简介:CHINA'SAGENDA21CHINA'SAGENDA21WhitePaperonChina'sPopulation,EnvironmentandDevelopmentinthe21stCenturyThefollowingareexcerptsf...

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  • 简介:Tibet’sPopulationandTibetanPopulationGuoDapingTheTibetannationality,oneofChina’smajorethnicgroups,hasinhabitedontheQinghaiTi...

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  • 简介:TasksforChina’sAgingProgrammeTheobjectivesofChina’sagingprogrammeareto“provideeconomicsupport,medicalandhealthcareservicesand...

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  • 简介:China'smalemarriagesqueezeanditspotentialconsequencehaveattractedmuchattentionandgivenrisetodebate,butmoststudiescontributethissqueezetosexstructureandneglecttheagestructure,andsomestudiesuseflawedmethodtostudythecontributionofagestructureinthissqueeze.InthispaperwedevelopanindicatorofSpousalSexRatio(SSR)andapplyadecompositionmethodintoageandsexstructure.BasedonthedatafromChina's2010censusandprojection,wepredictthatfrom2010to2020,theagestructurewillbethedominantfactorforChina'smalemarriagesqueeze,andfrom2020to2034,thecontributionofsexstructurewillbeincreasing,whereasthatofagestructurewillbedecreasing.From2034to2045,China'smalemarriagesqueezewillmainlyfromimbalancedsexstructure,andtheagestructurewillcontributelittleornegativelytoChina'smalemarriagesqueeze.

  • 标签: 挤压 中国 婚姻 年龄结构 性别结构 分解方法
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  • 简介:Withalargeworking-agepopulationwitharelativelylowaveragelevelofeducation,Chinaisfacingseverechallengesinemployment.Theseinclude:thecontradictionbetweenworkforcesupplyanddemand;irrationalemploymentstructure;increasingpressureontheurbanlabormarket;

  • 标签: 中国 劳动力就业 管理机制 政府职能
  • 简介:CONSTITUTIONOFTHEPEOPLE'SREPUBLICOFCHINACONSTITUTIONOFTHEPEOPLE'SREPUBLICOFCHINA(December4,1982)Article25TheStatepromotesfami...

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  • 简介:Tibet′sPopulation:PastandPresentTudengAfterTibetwasconqueredbytheMongolswhofoundedtheYuanDynasty(inthe13thcentury),ithassince...

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  • 简介:ChongqingBecomesChina’sNewMunicipalityTheestablishmentofChongqingMunicipalitywasdeclaredonMarch14,1997,whentheFifthSesionoft...

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  • 简介:OnNovember12,2013,theThirdPlenarySessionofthe18thCentralCommitteeoftheCommunistPartyofChina(CPC)officiallyissuedDecisiononSomeMajorIssuesConcerningComprehensivelyDeepeningtheReform,whichunderscoredtheimportanceofpromotingurbanizationofmigrantruralpopulation(transformingeligibleruralmigrants

  • 标签: 英语 阅读 理解 人口学
  • 简介:tatisticsonChina’1996SocialDevelopmentAlargesizesewagedisposalplantinFuzhouCity,FujianProvince.EducationalDevelopmentChinah...

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  • 简介:IntegrationofPopulationwithDevelopment:China'sPracticeIntegrationofPopulationwithDevelopment:China'sPracticeXiaoZili(Director...

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  • 简介:LAWOFTHEPEOPLE'SREPUBLICOFCHINAONTHEPROTECTIONOFRIGHTSANDINTERESTSOFWOMENLAWOFTHEPEOPLE'SREPUBLICOFCHINAONTHEPROTECTIONOFRIGH...

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