具有抑制性的抗温耐盐改性腈纶钻井液降滤失剂KWY的研制(4)

12油　田　化　学2004

年

腈纶废丝主要成分是分子量在6万左右的聚丙

烯腈,碱化水解后的聚丙烯腈分子虽然有很强的电负性,但分子量较小,只能在粘土晶体的侧面发生吸附,很难接近电负性很强的晶体平面,不可能全方位地堵塞泥饼中的毛细孔道[2]。水解聚丙烯腈分子的水化基团为羧基,形成的水化膜牢固性不如磺酸基周围的水化膜。KWY分子含有水化能力较强的磺酸基,分子量也高得多,因此包被性及堵塞毛细管

的效能提高,降滤失性能大大改善。进入KWY分子的聚醚多元醇本身具有抑制岩屑膨胀分散的能力,也使KWY具有了抑制岩屑分散的能力。

参考文献:

[1]高锦屏,郭东荣,吕开河,等1新型抗高温抗污染降滤失剂DY21

的研制及性能评价[J]1油田化学,1995,12(2):163—1641[2]刘玉英,张春光,孙德军,等1降滤失剂作用机理研究—新型降滤失剂的研制[J]1钻井液与完井液,1996,13(4):12—141

PreparationofHeatResistant,SaltsTolerantandInhibitoryFiltrateLossReducerKWYfor

AqueousDrillingFluidsfromAcrylicFibriousWaste

FANZe2Xia,WANGLan2Lan,SUNMing2Bo,WENYan2Jun

(CollegeofPetroleumEngineering,ChinaPetroleumUniversity,Dongying,Shandong257061,PRofChina)

Abstract:Thetitledchemicalagentispreparedinlaboratoryfromapowderedfibriousacrylicwastethroughalkalinehydrolysis,sulfonationwith22acrylamido222methylpropanesulfonicacid,andgraft2reaction/crosslinkingwithformalinandapolyetherpolyol1Theprocessofsynthesisisdescribedbriefly1Themainperformancepropertiesoffiltratelossreducerareevaluatedinlaboratory1Throughmeasurementsoffiltrateloss,FL(API),ofthe2drilling(150℃in16hrsunderstaticconditionsitisestablishedthattheoptimaldosageofKWY)isrange014—015%andinsaltwaterandseawaterDFsisinrange110—115of,andFLitisascertainedthattheheatresistancyofKWY(01)inisofof5)15%,and35%saltwaterandseawaterDFs—160℃;to,isJS,anHPAN1Theresultsoftestsonreservoirsandrecoveryafter℃shaleinhibitingcapacityof1%KWYsolutionissimilartoorhigherthanthatof5%KClKeywords:　drillingfluidadditive;modifiedpolyacrylonitryl;filtratelossreducer;preparation;shaleinhibition;heatresistancy;saltstolerancy;waterbasedrillingfluids

(上接第9页。continuedfromp.9)

Temperature/PressureRelationshipsofYieldStressandPlasticViscosityforFoamedDrillingFluids

ZHANGRui,WANGRui2He,QIUZheng2Song

(CollegeofPetroleumEngineering,ChinaPetroleumUniversity,Dongying,Shandong257061,PRofChina)

Abstract:Theexperimentalfoameddrillingfluids(EFDFs)arepreparedbystirringtheaqueousdrillingfluidscontaining715%,910%,and1210%bentonite+additives(onthebasisoffreshwateras100%bymass)at1200r/minover5hrsandhaveinitial

3

density,ρ0,0160,0175,and0190g/cm,foamquality37175%,30123%,and18192%,g/lseparationstartingin>4hrs,andhalf2lifetime>8hrs1Theirbasicreceptispresented1OnimprovedFann50rheometershearstressismeasuredfortheseEFDFsattemperature60℃,90℃,and120℃,pressure11034,21069,31103,41137,and51516MPa,rotatingspeed6,100,200,300,and600r/min1Applyingto4commonlyusedrheologicalmodels,allshearstress/shearratedataobtainedundereverytemperature/pressurecombinationarelinearizedandtreatedbyregressiontodemonstrateBinghammodelastheoptimalonewithhighestcorrelationcoefficients(CCs)018429,018382,and018400fortheEFDFsofdifferentρ0value1Theyieldstress,τ0,andtheplasticviscosity,ηp,oftheseEFDFsateverytemperature/pressurecombinationarecalculatedbythestandardprocedureandtabulated1Theinfluencesofρ0,temperature,andpressureonτ0andηpandthemicroscopicmechanismsinvolvedarediscussed1Lotsofexpressionsforτ0andηpintermsoftemperatureandpressurearetreatedthroughregressionandinresult3setsofmathematicalmodelsforτ0andη01994)areestablishedwitheverysetofmodelsforEFDFofdefiniteρp[=f(P,T)]withthehighstCCs(01934—0havingsimilarformandeverymodelinasethavingdifferentvaluesofconstants1

Keywords:　waterbasedrillingfluids;foameddrillingfluid;yieldstress;plasticviscosity;temperature/pressurerelationships;matematicalmodels

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