苏里格气田井下节流气井积液规律研究-论文.pdf

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1、石油机械2013年第41卷第9期CHINAPE．rR0IEUMMACHlNERY●油气田开发工程苏里格气田井下节流气井积液规律研究杨旭东于志刚肖述琴卫亚明(长庆油田分公司油气工艺研究院；低渗透油气田勘探开发国家工程实验室)摘要：随着气田的不断开发，气井逐渐不能满足最小携液流量要求，井底及井筒便产生积液，当积液量到达一定程度时，气井压力、产量便迅速下降。为延长气井变为低产、低效井的时间，有必要研究气井积液规律。采用Flunent软件以苏C节流井为例，进行了节流流场CFD模拟。模拟结果表明，地层中携带了液体的气流由近井储层流入井底，在井底积液层的阻力作用下气流中的部分液体

2、滞留；在井底积液液面处气体以携带少量液体的低速雾流形式流至节流器上游；携带了液体的气流在节流器“回流”效应及“淹没射流”作用下，部分液体在节流器上段沉积，随生产时间延长，节流器上段井筒积液液面进一步升高。关键词：苏里格气田；气井；井下节流；积液规律中图分类号：TE377文献标识码：Bdoi：10．3969／j．issn．1001—4578．2013．09．027ResearchontheLawofLiquidLoadinginDownholeThrottleGaswellinSuligeGasfieldYangXudongYuZhigangXiaoShuqinWeiY

3、aming(ResearchInstituteofPetroleumTechnology，ChangqingOieldCompany；NationalEngi~eringLaboratoryforExplorationandDevelopmentofLow—PermeabilityOil&GasFields1Abstract：Withthecontinuousdevelopmentofgasfields，gaswellscannotmeettheneedsoftheminimumfluid．carryingflowrate．Asaresult，liquidloadin

4、garisesatthewellbottomandintheshaft．Whentheliquidloadingrea—chesacertainquantity，thegaswellpressureandproductionwilldecreaserapidly．Tolengthenthegaswellservicelifebeforeitbecomesalow—yieldandlow-eficiencywell，itisnecessarytostudythelawofgaswellliquidload-ing．Thecomputationalfluiddynamic

5、(CFD)simulationofthrottlingflowfieldwasconductedadoptingtheFluentsoftwareandtakingthrottlingwellCofSuasanexample．Theresearchfindingsshowthattheliquidloadinglawofdownholethrottlinggaswellgoesasfollows．Theliquid-carryinggascurrentflowsfromnear—wellborereservoirintowellbottomandpartoftheli

6、quidinthegascurrentremainsduetotheeffectoftheresistancefromthedownholeliquidloadinglayer．Thegasflowstotheupperpartofthethrottleintheformoflow—speedmistflowwhichcarriesasmallquantityofliquidatthebottomholeliquidloadingleve1．Anotherpartofliquiddepositsintheupperpartofthethrottleduetotheef

7、fectofthebackfloweffectandthesubmergedjeteffectinthelowerpartofthethrottlewhichcarriessomeliquid．Asaresult，theshaftliquidloadinglevelgoesupintheupperpartofthethrottle．Keywords：SuligeGasfield；gaswell；downholethrottling；lawofliquidloading开发，气井压力下降，逐渐不能满足最小携液流量0—口要求，井底及井筒便产生积液，当积液