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1、石油機(jī)械2013年第41卷第9期CHINAPE．rR0IEUMMACHlNERY●油氣田開發(fā)工程蘇里格氣田井下節(jié)流氣井積液規(guī)律研究楊旭東于志剛肖述琴衛(wèi)亞明(長慶油田分公司油氣工藝研究院；低滲透油氣田勘探開發(fā)國家工程實驗室)摘要：隨著氣田的不斷開發(fā)，氣井逐漸不能滿足最小攜液流量要求，井底及井筒便產(chǎn)生積液，當(dāng)積液量到達(dá)一定程度時，氣井壓力、產(chǎn)量便迅速下降。為延長氣井變?yōu)榈彤a(chǎn)、低效井的時間，有必要研究氣井積液規(guī)律。采用Flunent軟件以蘇C節(jié)流井為例，進(jìn)行了節(jié)流流場CFD模擬。模擬結(jié)果表明，地層中攜帶了液體的氣流由近井儲層流入井底，在井底積液層的阻力作用下氣流中的部分液體
2、滯留；在井底積液液面處氣體以攜帶少量液體的低速霧流形式流至節(jié)流器上游；攜帶了液體的氣流在節(jié)流器“回流”效應(yīng)及“淹沒射流”作用下，部分液體在節(jié)流器上段沉積，隨生產(chǎn)時間延長，節(jié)流器上段井筒積液液面進(jìn)一步升高。關(guān)鍵詞：蘇里格氣田；氣井；井下節(jié)流；積液規(guī)律中圖分類號：TE377文獻(xiàn)標(biāo)識碼：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開發(fā)，氣井壓力下降，逐漸不能滿足最小攜液流量0—口要求，井底及井筒便產(chǎn)生積液，當(dāng)積液
