油井自激压力波的产生及在油层中的传播

A152Ser.A,Vol.15,No.220006JOURNALOFHYDRODYNAMICSJune,2000:100024874(2000)0220247207a(,257062):,,10m,,,,:;;;TE312:A1,,,,[1],:,;,;,;,,,,,,,,,22.1,,,,a:1999205214:(1963),,©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.,1,,:pwf=Q0gH(1),H,m,,[2],,,Q0gH0;M,(-pwj),,,,,,,,M,(pwj),,,,,,12.2,,:f=n60(2)n,1ömin:pmax=ûQ0gHû+û-pwjû+ûpwjû=Q0gH+2pwj(3),[3]:pwj=Qmcv0(4):Qm=Qwnw+Q0(1-nw)(5)QmQwQ0nw,v0,mös(4),c:84220002©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.c=EöQm1+DeEEs(6):E=Ewnw+E0(1-nw)(7),D,mm;e,mm;Es,2.061011Pa;EwEo,2.06109Pa1.32109Pa;E,,,,,,,v0,,[4],:vKö2=s2Xsin(AK2)(8):X=2Pn60(9)AK=arccos(1-2Ks)(10),s,m;X,s-1;AK:K=fpQwL2g(1fr+1ft)Es(11),fpfrft,,m2;L,m(8)vKö2,,:v0=7vKö2=7sXsin(AKö2)2(12):7=ftff+fr(13):tKö2=AK2X(14)2.3212,512,34,56mm,1,0.9,330m,0.8,,1942:©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.1:10-1MPaL(m)n(m)6912f(Hz)0.10.150.2s(m)1.21.83.01.21.83.01.21.83.0800tKö2(s)0.860.690.530.510.460.360.270.350.27pwj1.6332.1182.8512.4513.1774.2763.7674.2375.700pmax32.9633.9435.4034.6036.0438.2536.2338.1741.101000tKö2(s)1.110.880.670.740.690.450.550.440.33pwj1.8212.4823.4462.7323.7225.1603.6424.8636.885pmax33.3434.6636.5935.1637.1540.0236.9839.6343.471200tKö2(s)1.411.090.810.940.720.540.710.540.41pwj1.8102.7143.9432.7144.0715.9103.6195.4307.890pmax33.0235.1337.5935.1337.8441.5336.6437.5645.482323,,;(0.2Hz),(pmax3010-1MPa)(,),;;,;,,,;,,,3,,,,,,05220002©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.:ý2P=1V5P5t(15),V,cmös,(15)::t=0,P=P0(P0,):t0,R=Re,P=Pi(Pi,P0=Pi),,,,:Pw(t)=Pmaxcos(2PXt)P(r,t)=Pmaxe-X2Vercos(Xt-X2Vr)(16)P(r,t)rt,:1),X2Vr;2),r,,45V=5000cm2ös,4,10m,cm45,,M(),(),M,,M,,152:©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.6767,,,;;,5,3,11.5t,,45t,,,,,,,,,,2006(1);(2),;(3);(4):[1].[M].:,1996.[2].[P].96227202.7.[3].[M].:,1990.[4],.[M].:,1992.[5].[M].:,1997.[6]BERRYMANJG.Long2wavelengthpropagationincompositeelasticmedia[J].J.Acoust.Soc.Am.,1968,68:180921819.[7]JOHNSONDL,PLONATJ.Acousticslowwaveandtheconsolidationtransition[J].J.Acoust.Soc.Am.,1982,72:5562565.25220002©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.GenerationandPropagationofSelf2ExcitingPressureWavesinQilReservoirLEIGuang2lun(DepartmentofPetroleumEngineering,UniversityofPetroleum,Dongying257062)Abstract:Byusingawavegenerator,theself2excitingpressurewavescanbegeneratedwhenwellpumpingunitworks.Thewaveshavelowfrequenciesandlargeamplitudesandactcontinuouslyontheoilreservoiruptothedepthof10m.Calculationandexperimentsshowthatthewaveamplitudesmainlydependonthesubmergencedepth,strokeandrateofpump.Fieldsestsindicatethatpressurewavescanimprovetheflowabilityofoilandincreasetheproductivityofwells.Keywords:self2excitingwaves;wavegenerator;enhancedrecovery;lowproductivity352:©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.