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:100020747(2002)05200622041,2,2,2(1.;2.):,,,,,,324():;;;;;;:TE348:A,6(11%15%,110-3310-3m2),,,,,,,,,,[1]11.1,654.3%86%,,10a,86%,2t;43%,0.5t,29%45%,0.88m3/(dMPa)0.69t/(dMPa)0.49m3/(dMPa)0.28t/(dMPa)1985,,,;,,70.0%,,1.2,6,,2.45.9MPa,311MPa,,,0.434.35m/d,2,,11,80m,1.36,,,728,0.047MPa/m;80m1(2.12mPas,9.6810-3m2,9.68%)(1),0.305MPa/m,1.765MPa/m,,7285.5210-3m2,11.14410-326200210PETROLEUMEXPLORATIONANDDEVELOPMENTVol.29No.5m2,0.49710-3m2,()(2);,,1,0.12MPa/m,0.030.12MPa/m11140/23121242,[2],,,,:52p52x=15p5t(1):p(x,0)=pip(0,t)=pwp(,t)=pi(2):pi-p(x,t)=(pi-pw)1-erfx2t(3)n,(3),[3],:p=po+pw=6ni=1pi(4)r,(4)tx:p=7.21-erfx2t-12.81-erfr-x2t(5)p(x,t)=pi-7.21-erfx2t+12.81-erfr-x2t(6)(6),,t:CAtDA=e4tDA(7)tDA=tDrw2/A=t/Ap,MPa;pi,pw,MPa;rw,m;r,m;CA;tD;A,m2;,rt,r3,,250m,80m65m,6570m,;80m,,,,:1250m;2200m;3150m;4120m;5100m;680m3(a)(b)36200210:0.710-3m2,13%,23.810-4MPa-1,2.8mPas,0.66mPas,8.31MPa,,250m,,0.12MPa/m,0.710-3m28.31MPa1MPa21MPa,120m[4](3b)33.1,199815224,330m3,4050m3,4.3,2.5m3/(md),,4.48t/d,132%,199719,1.2m3/(dm)2.53.0m3/(dm),56.85MPa10.52MPa,,-6.19%19986228,1.56.0,0.8m3/(md)1.61.9m3/(md),1.7t2.5t3.2,,1996151,1.98t/d2.26t/d,48.3%42.8%,3.3,,199620,20m330m3(6080m3),2.33.0m3/(md),100%5a,,(1)3.419962000,161,53.491104m3;4,40%,;9,7;,130,2.18t2.59t,33.0%30.3%;329,233,6.4138104t,195t1()()(m3/(md))(t)(MPa)42531.151.470.3266631.221.270.272152.41.662.201.908372.31.752.101.673.5,120m[4],(2),80150m,0.7104t,7%2(m)8080120120150150()1141122.23.633.821.91(t)1.53.142.901.451.902.622.491.2541.013.614.97.5(%)53.016.422.811.946.514.623.911.91040900931965(m)11809591013506117110611124111844.1,6,,199670.5%200081.4%,30m3,23m3,56MPa,78MPa4.2,1990,46Vol.29No.5,19982001101%110%115%117%,,19955.45MPa20017.37MPa,65.6%88.7%4.3,,,(199920016.85%6.74%4.02%),,,199920011.23%1.79%1.6%,(2.5%)4.4,(19881990),,,,17.03%,53.2%,30%5,19962000,,,,,:[1],,.[A].[C].:,1994.25242.[2],.[M].:,1997.[3],.[M].:,1989.[4],,.[R].:,2000.:(19632),,,,,:,,:710021:2002204219()TheeffectivedrivingpressuresystemstudyandadjustmenttechniquesofwaterfloodinginAnsaioilfieldLIShu2jun1,2,LIULiang2ren2,XIONGWei2liang2(1.NorthwestUniversity,Shaanxi710069,P.R.China;2.ResearchInstituteofExplorationandDevelopment,ChangqingOilField,PetroChina,Shaanxi710021,P.R.China).Abstract:TheeffectsofmanyfactorsonwaterfloodinginAnsaiextra2lowpermeabilityoilfield,suchasthestrongerheterogeneityofreser2voirs,thebiggerstartingpressuredifferenceanddrivingpressuregradient,thenaturalfracturedevelopmentandthedecliningproductivityin2dexafterwaterbreakthrougharegettingincreasinglystrong.OnthebasisofPressureSuperpositionPrinciple,theformationpressuredistribu2tion,thepressuredifferenceandpressuregradientbetweenproducersandinjectorswereestablished,andthereasonablewellarrayspacingandtheeffectivedrivingpressuresystemweredeterminedbyusingthestart2uppressuresgainedfromlaboratoryexperimentandon2sitemeasure2ment.Thesemethods,combinedwithsomeotheradjustingtechniquesofwaterflooding,suchasforcedwaterflooding,non2steadywaterflood2ing,linewaterfloodingalongthefracture,adjustinginjectionandproductionprofileandinfilldrillingalongthefracture,haveprovidedgoodresultinstabilizationofoilproduction.Keywords:Ansaioilfield;fracture;start2uppressuregradient;waterflooding;developmentadjustment;adjustmentbyinfilldrilling;wellar2rayspacing56200210: