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1、第201421年卷7第月7期Conte當(dāng)mporar代yChemi化calInd工ustryVo1.41.NO.7July,2012超稠油高溫調(diào)剖封竄技術(shù)郝建玉(中國(guó)石油遼河油田公司曙光采油廠,遼寧盤錦124109)摘要:蒸汽吞吐開(kāi)采是遼河油田超稠油主要開(kāi)采方式。曙光油田杜84塊興隆臺(tái)超稠油油藏孔隙度一般為25%~30%,空氣滲透率一般高于1306X10m,具有高孔隙度,高滲透率的特點(diǎn),極易發(fā)生汽竄,導(dǎo)致注入蒸汽熱能不能充分利用,直接降低了注汽井生產(chǎn)效果,使油藏動(dòng)用不均的矛盾加劇。鄰井受竄后含水升高液量突升,溫度升高,影響其生產(chǎn)效果或關(guān)井防噴。汽竄加劇油層套管變形或損壞。研制的耐高
2、溫堵劑有效封堵高滲透層,調(diào)整地層高低滲透層帶間的吸汽差異,改變注入蒸汽的走向,達(dá)到緩解汽竄、消除井問(wèn)干擾、擴(kuò)大注入蒸汽波及體積、提高周期采油量的目的。關(guān)鍵詞:遼河油田;蒸汽吞吐;汽竄;高溫調(diào)剖中圖分類號(hào):TE355文獻(xiàn)標(biāo)識(shí)碼:A文章編號(hào):1671—0460(2012)07—0712—03HighTemperatureProfileControlandChannelBlockingSealingTechnologyforSuperHeavyOilResearviorsHAOJian-yu(PetroChinaLiaoheOilfieldCompanyShuguangOilProduc
3、tionFactory.LiaoningPanjin124109,China)Abstract:Thecyclicsteamstimulation1SarecoverymethodofsuperheavyoilinLiaoheoilfield.TheporosityofDu84blockofXinglongtaioilfieldinsuperheavyoi1reservoirisgenerally25%to30%.a(chǎn)irpermeabilityisgenerallyhigherthan1306×10一gm.Becauseofitshighporosityandhighpermeab
4、ility,steamchannelingeasilyoccurstocausethatheatenergyofthei~ectedsteamcannotbefullyutilized,whichcanreduceproductioneffectofthesteaminjectionwel1.Watercutinadjacentwellafterthesteamchannelingincreases,temperaturerises,whichcanaffecttheproductionorcausetoshutinwel1.Steamchannelingaggravateseas
5、ingdeformationordamage.Thehightemperatureresistantpluggingagentcanefectivelyblockhighpermeabilitylayer,adjustthesteamabsorptiondifferencebetweenlowpermeabilitylayerandhighpermeabilitylayer,changetheflowdirectionofi~ectedsteam,whichcanalleviatethesteamchanneling,eliminateinterferenceamongwells,
6、expandtheinjectedsteamsweptvolume,improvecycleoilproduction.Keywords:Liaoheoilfield;Steamstimulation;Steamchanneling;Hightemperatureprofile曙光油田杜84塊興隆臺(tái)超稠油油藏,地處曙光較好,油層為多油組薄互層油藏,具有孔隙度高,油田曙一區(qū)中部,構(gòu)造上位于遼河盆地西部凹陷西滲透率高的特點(diǎn)。但儲(chǔ)層非均質(zhì)性較嚴(yán)重,縱向上斜坡中段,含油面積1.4km,探明地質(zhì)儲(chǔ)量1970層間滲透率級(jí)差往往大于2030倍,滲透率變異系x104t,油藏埋深740~870m,層
7、位分為上下兩套數(shù)O.50.7。蒸汽吞吐開(kāi)采是遼河油田超稠油主要層系,平均有效孑L隙度28.8%、滲透率1306x10開(kāi)采方式。超稠油油藏一般為疏松的砂巖油藏,物rn2、含油飽和度62.85%、泥質(zhì)含量7.0%、粒度性好,滲透率高,油層流動(dòng)系數(shù)大,油層吸汽能力中值0.47mm。原油全分析統(tǒng)計(jì)結(jié)果表明,原油物強(qiáng),有利于蒸汽吞吐開(kāi)采。由于高孔高滲儲(chǔ)層的存性具有“四高一低”的特點(diǎn):原油密度高,20cc時(shí)在,極易發(fā)生汽竄。原油密度大于1.0g/cm;原油粘度高,50oc地面脫l