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1、第38卷第2期石油鉆采工藝Vol.38No.22016年3月OILDRILLING&PRODUCTIONTECHNOLOGYMar.2016文章編號：1000–7393（2016）02–0138–06DOI:10.13639/j.odpt.2016.02.002車66區(qū)塊鉆井過程井底壓力波動(dòng)及滲流規(guī)律12李云 賈江鴻1.中國石化勝利石油工程有限公司技術(shù)裝備處；2.中國石化勝利石油工程有限公司鉆井工藝研究院引用格式：李云，賈江鴻.車66區(qū)塊鉆井過程井底壓力波動(dòng)及滲流規(guī)律［J］.石油鉆采工藝，2016，38（2
2、）：138-143，155.摘要：針對車66區(qū)塊鉆井過程中易出現(xiàn)的阻塞、地層垮塌、井漏甚至井噴等問題，基于環(huán)空流體力學(xué)并結(jié)合地層滲透性特征，分析了在起、下鉆及鉆井過程中產(chǎn)生的抽汲壓力和激動(dòng)壓力的大小，以及鉆井液黏度、密度，井深和鉆井速率對其影響的規(guī)律；依據(jù)線性滲流定律，單向流體球面向心流和平面徑向流模型研究了井底負(fù)壓差下進(jìn)入、鉆過儲(chǔ)層的滲流規(guī)律變化及正壓差條件下鉆井液漏失情況，得出井底壓差越大、地層滲透率越高，地層流體滲流速度越高，鉆井液漏失量越大。該分析結(jié)果揭示了鉆井過程中井底壓力波動(dòng)和井下滲流規(guī)律及其相
3、關(guān)影響因素，為井身結(jié)構(gòu)設(shè)計(jì)優(yōu)化提供了必要依據(jù)。關(guān)鍵詞：鉆井；井底壓力；滲流規(guī)律；井身結(jié)構(gòu)設(shè)計(jì)；車66區(qū)塊中圖分類號：TE254 文獻(xiàn)標(biāo)識碼：ABottom-holepressurefluctuationandseepagepatternduringwelldrillinginChe-66Block12LIYun,JIAJianghong1.TechnologyandEquipmentDepartment,SINOPECShengliOil?eldServiceCorporation,Dongying,S
4、handong257000,China;2.DrillingTechnologyResearchInstitute,SINOPECShengliOil?eldServiceCorporation,Dongying,Shandong257000,ChinaCitation:LIYun,JIAJianghong.Bottom-holepressurefluctuationandseepagepatternduringwelldrillinginChe-66Block［J］.OilDrilling&Product
5、ionTechnology,2016,38(2):144-149,154.Abstract:DrillingoperationsintheChe-66Blockaresusceptibletoblocking,formationcollapsing,lostcirculation,blowoutandothercomplexities.Basedonfluiddynamicsinannulusandwithconsiderationtoformationpermeabilityfeatures,magnit
6、udesofswabbingpressureandsurgepressureproducedduringtrippinganddrillingoperationswereanalyzed,togetherwitheffectsofdrillingfluidviscosities,densities,welldepthsandROPs.Inaccordancewithlinearseepagetheory,modelsforunidirectionalfluidsphericalcentripetalflow
7、andplaneradialflowweredeployedtodetermineseepagepatternsandlostcirculationofdrillingfluidsduringpenetrationofreservoirformationsundernegativepressure.Researchresultsshowthathigherbottom-holedifferentialpressureandformationpermeabilitymayleadtohigherspeedin
8、seepageofformationfluidsandhighervolumeofdrillingfluidslost.Theconclusionshighlightedfluctuationinbottom-holepressureduringdrilling,togetherwithseepagepatternandrelevantinfluencingfactors.Theresearchresultsca
