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《下寺灣油田44井區(qū)長(zhǎng)6油藏注采調(diào)整治理技術(shù)研究》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在工程資料-天天文庫(kù)。
1、摘要特低滲油出在我國(guó)近年來(lái)投入開發(fā)的油出或探明儲(chǔ)量中占有近60%的比重。如何高效開發(fā)該類油藏是我國(guó)石油工業(yè)面臨的主要問題。鄂爾多斯盆地下寺灣油出柴窯柴44井區(qū)延長(zhǎng)組長(zhǎng)6油藏是一典型的特低滲碎屑巖油藏，因井網(wǎng)型式、注采壓力系統(tǒng)等不適應(yīng)造成開發(fā)效果口益變差。本文借鑒國(guó)內(nèi)特低滲碎屑巖油藏注水開發(fā)經(jīng)驗(yàn)與成果，采用常規(guī)油藏工程及油藏?cái)?shù)值模擬技術(shù)制定柴窯柴44井區(qū)合理可靠注水治理挖潛技術(shù)政策及綜合調(diào)整方案，取得了以下成果和認(rèn)識(shí)：1）柴44井區(qū)長(zhǎng)6油藏天然能量匱乏，地層壓力下降較大；投產(chǎn)后生產(chǎn)井產(chǎn)量下降快，綜合含水上升較快，單井產(chǎn)能低等特點(diǎn)，應(yīng)及時(shí)注水補(bǔ)充地層能量，完善注采井網(wǎng)。2
2、）結(jié)合柴44井區(qū)現(xiàn)井網(wǎng)狀況，推薦柴44井區(qū)長(zhǎng)6油藏采用反七點(diǎn)注采井網(wǎng)，合理井網(wǎng)密度21口/knA合理井距為165米左右。3）柴窯44井區(qū)長(zhǎng)6油藏的合理地層壓力保持水平為5.8MPa,最大井口注入壓力MPa；階段注采比可保持在1.03：1,單井H注水量為6m3/d,單井采液量2m3/d,確定較合理的采液速度為1.6%o4）根據(jù)方案優(yōu)化及對(duì)比，推薦的加密調(diào)整井網(wǎng)與配產(chǎn)配注方案預(yù)測(cè)生產(chǎn)到2050年底，綜合含水81.5%,采出程度18.6%,地層壓力恢復(fù)到5.53MPa,壓力保持水平77%,開發(fā)效果和經(jīng)濟(jì)效益良好。論文制定的切實(shí)可行的注水開發(fā)技術(shù)政策界限及綜合治理調(diào)整方案對(duì)鄂
3、爾多斯盆地同類油藏高效注水開發(fā)具有一定借鑒意義。關(guān)鍵詞：特低滲、注水開發(fā)技術(shù)政策、綜合調(diào)整治理、油藏?cái)?shù)值模擬、下寺灣油田、鄂爾多斯盆地AbstractSuper-lowpermeableoilfieldoccupies60%inthetentativedevelopment-geologicalclassificationoftheoilreservoirsinChina.Howtohigh-effectivedevelopmentthiskindofoilreservoiristhemainproblemthatourcountry'spetroleumindust
4、ryfacing.TheChang6reservoirofYangchangSeriesinChai44wellsregionofXiasiwanOilfieldisatypicalsuper-lowpermeabilityclasticrockreservoir.Thewellpatternandinjectioprouductionpressuresysteminadaptationthedevelopmenteffectcausedbyincreasinglyworse.Thispaperusesforreferencefromwaterfloodingdeve
5、lopmentexperienceofsuper-lowpermeabilityclasticrockrcscrvoii;usingconventionalwservoirengineeringandreservoirnumericalsimulationtechniquetomakereasonableinjectiongovernancepotentialtappingtechnologyandcomprehensiveadjustmentscheme,achievedachievementsandcognitionasfollows:1)Chang6reserv
6、oirofChai44wellsregionhaslackofnatureenergyandformationpressurehasagreaterdropthanotherwells?Itischaracteristicincluding:Theoutputofproductionwelldecreasesfast;comprehensivewatercontentwillincreasefastasyielddecreased;andresultassinglewellproductioncapacitywilllowetc.Therefore,shouldinj
7、ectwatertoincreasereservoirenergyintimeandcompletefoldingwellpatterntosolvetheproblemabove.2)ConsiderwellnetworkconditioninChai44wellsregion,suggestthatusetheinvertedseven-spotinjection-productionwellpatternonChang6reservoirofChai44wellsregion.Reasonablewellpatterndensityshould
