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1、第4O卷第3期石油鉆探技術(shù)Vo1.40No.32012年5月PETROLEUMDRILLINGTECHNIQUESMay,2012低滲油氣田高效開(kāi)發(fā)鉆井技術(shù)專題doi:10.3969/j.issn.1001—0890.2012.03.002勝利低滲油田長(zhǎng)水平段水平井鉆井關(guān)鍵技術(shù)韓來(lái)聚,牛洪波,竇玉玲(中國(guó)石化勝利石油管理局鉆井工藝研究院,山東東營(yíng)257017)摘要:長(zhǎng)水平段水平井鉆井技術(shù)已經(jīng)成為低滲透油氣田開(kāi)發(fā)的重要技術(shù)保障,但國(guó)內(nèi)相關(guān)技術(shù)起步較晚,對(duì)該項(xiàng)技術(shù)的認(rèn)識(shí)還需要統(tǒng)一,對(duì)如何發(fā)展與該技術(shù)配套的優(yōu)快
2、鉆井技術(shù)有待進(jìn)一步研究。通過(guò)分析該技術(shù)在井眼軌道優(yōu)化設(shè)計(jì)、井眼軌跡控制和鉆井液性能提高方面的主要技術(shù)難點(diǎn),明確了關(guān)鍵技術(shù)攻關(guān)方向。通過(guò)模擬分析井眼軌道摩阻、扭矩,確定了造斜率和井眼軌道類型的優(yōu)選原則;通過(guò)分析靶前位移與裸眼段摩阻系數(shù)的敏感性,明確了二者關(guān)系,并就其成因進(jìn)行了鉆柱力學(xué)解釋,提出了靶前位移的優(yōu)選原則,形成了長(zhǎng)水平段水平井井眼軌道設(shè)計(jì)的主要思路。建立了基于地層可鉆性級(jí)值的井眼軌跡控制方案優(yōu)化方法,提出了以旋轉(zhuǎn)減摩技術(shù)為基礎(chǔ)的井眼軌跡高效控制思路。梳理了井壁穩(wěn)定、井眼凈化和潤(rùn)滑防卡等長(zhǎng)水平段水平井
3、鉆井液關(guān)鍵技術(shù),介紹了相應(yīng)的主要技術(shù)措施。結(jié)合高平1井,介紹了上述各關(guān)鍵技術(shù)的應(yīng)用情況,實(shí)例驗(yàn)證了各技術(shù)的有效性。關(guān)鍵詞:長(zhǎng)水平段水平井井眼軌道優(yōu)化設(shè)計(jì)井眼軌跡控制低滲透油氣田中圖分類號(hào):TE243文獻(xiàn)標(biāo)識(shí)碼:A文章編號(hào):1001—0890(2012)03—0007—06KeyDrillingTechnologiesforLongDisplacementHorizontalWellsofLowPermeabilityReservoirsinShengliOilfieldHanLaiju,NiuHongbo
4、,DouYuling(DrillingTechnologyResearchInstitute,ShengliPetroleumAdministration,Sinopec,Dongying,Shandong,257017,China)Abstract:Drillinglongdisplacementhorizontalwellshasbecomeanimportanttechnicalsupporttode—veloplowpermeabilityreservoirs,butrelatedtechniqu
5、esinChinastartrelativelylate.Itisnecessarytoreachacommonunderstandingofthetechniquesandcarryoutfurtherresearchonoptimizedmatchdrillingtechniques.Therefore,thekey-pointofthetechniquehasbeenidentifiedbyanalyzingtheirdifficultiesinwelltrajectorydesignandcont
6、ro1aswellasdrillingfluidproperties.Theprinciplesforselectionofbuild-uprateandwelltrajectorytypehavebeensetupthroughsimulatingtorqueanddrag.Throughanalyzingsen—sibilityoffrictioncoefficientanddisplacementfromwellheadtotargetpoint。themaincharacteristicsandt
7、heirrelationshiphavebeendetermined,thecorrespondingexplanationofdrillingstringmechanicswasgiv—en,theselectionprincipleofdisplacementfromwellheadtothetargetpointwasproposed,themainideaforwelltrajectorydesignoflongdisplacementhorizonta1wellformed.Anoptimize
8、dwellpathcontrolsolu—tionwasestablishedonthebasisofformationdrillabilitygrades,andthenaneffectivewellpathcontrolmethodwaspresentedbyrotaryreductionoffriction.Thecriticaltechniquesofwellborestability,holecleaninganda