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8210200810ACTAGEOLOGICASINICAVol.82No.10Oct.2008:973(2002CB211707)(50490271)(2001BA803B0403)(50221402)(IRT0408)(50025413)(306002):2008205207;:2008208212;::,,1959,,,,:010-62331305;Email:psp@cumtb.edu.cn,,,,,,,100083:,1321,;,,,:;;;,,(),,,,,,,,,,,,,(,1999),CedarHillFruitland,:,,,,,VP/VS(),,,PAVOAVO,AVO,;,AVO,,AVO(Ramosetal.,1994,1997;Chenetal.,1999;Riedeletal.,2003;Russelletal.,2003;Pengetal.,2006)PHudson()(Hudson,1980,1981),ChengThomsen(Cheng,1993),2008,(CDS),:,,,(),,,(Davisetal.,1993;Shucketal.,1993,1996;,2001;Pengetal.,2006),1/3,(,2002,2004,2005a,2005b;,2006),,19911011CedarHill(Davisetal.,1993;Shucketal.,1993,1996;Ramosetal.,1994,1997),(),,,,(,);,,,,,,3D9C(3.4km2),2D9C,3CVSPAlford,,,:,,,,PAVO9CMP(55m55m),AVO,ShueyPAVOPG,PG;PG,AVO1,,,,,,,,,1.1(,1999),(1),2278m/s;1646m/s;775m/s,1.2,(2)21.6%71.7%,1.3,213110:(3),0.111MPa,0.219MPa;1.832MPa,5.131MPa,,1(m/s)(,1999)Table1Thesonic2wavevelocityofvariouscoalstructure(m/s)(fromHeetal.,1999)22511971640224313839003252407178511022356189495321341199882227816467752(,1999,)Table2Elasticparametersofcoal(fromHeetal.,1999,supplied)E(MPa)sm(MPa)K(MPa)l(MPa)21000.364769.792573.532060.3364000.1752723.403282.051466.4567.2%51.2%71.7%21.6%28.8%3(,1999)Table3Strengthparametersofcoal(fromHeetal.,1999)(MPa)(MPa)2.481.281.8321.282.480.1116.144.285.1314.286.140.2191.4(4),,,,1.5,,,,,,,,,,,,,4(,1999)Table4Resistivityparametersofcoalwithgasoutburst(fromHeetal.,1999)(m)464316351579278199478737687949278731403053348105044555505,,5Table5Wellloggingcharacteristicsofvariouscoalstructures()()(),,,2AVOAVOCDP(Amplitude2Versus2Offset)AVO80,,31312008AVO,AVO,AVOAVOAVO(AVO),AVOAVOAVO,:R()=P+Gsin2(1),,R(),,P,GP,AVO,:()(),(),,G,,,,,AVO,AVO(1):(1)AVO,()(2)(18),,1540(3)AVO,,,(4),()AVOAVO,,AVO,,,AVO,,AVO,();(AVO):9m(1/4),AVO;915m,AVO;15m,,(AVO)AVO(2),AVO,(),AVOAVO,VP,VSVP3VPVS2,,,AVO6(6)6AVOTable6ThreeparametersofAVOAVO//attr1:/attr2PVP/attr3:VP/VS/attr4:/attr5:K/attr6:7AVOAVOKelly(2001)Skidmore(2001)AVO7AVOTable7ThecomparisionofdifferentAVOinversionmethodsAVOAVOAVOKellySkidmoreAVOKPGVPVP,VSVS,413110:5131200845223Fig.4TheP2wavesyntheticseismograminwell5223,HuainancoalfieldAVO,,,3,,,(),,,()3.1,,,,:S(t)=R(t)3Ws(t)(2),S(t),R(t),Ws(t),3R(t)Ws(t):R(t),R(t)Ws(t),,,(4),(5)55224PSFig.5ThePS2wavesyntheticseismograminwell5224,Huainancoalfield3.21321(6),(42154216),+;(6235224),,+,(455223),,++,7132110ms,,,,;,,,613110:,,,3.3Z,:,PPPS,PP,,,813218ms1.9,1321(5224623),,81321Fig.8Theareawithlowvelocityratioincoal1321,Huainancoalfield3.4,,,9,1321,(10)10,13ms,5224,Kc111321Kc,Kc,Kc,5224713120083.5RT,,,RT,,,(12),(10),13CCP24826RT,,R45,813110:,,180,T,12,R,,;T,,180,14RT,,(),5224,,112,3.6,,,;,,,(T),,,9131200814Fig.14Thepolarizedazimuthdistributionoffastwave,Huainancoalfield15RT,T,15TR(:T,:R)Fig.15ThestackprofileofRorTcomponent(upTcomponent,downRcomponent)45,,,180,,,RT,1321TR(16),TR,1321,1321,(17)17,,,,,4(1),,;023110:(2):,,,,,,,(3):,,,,2,;AVO,,.1999..:..2001..,40(2):131137.,,,.2002.2VSP.,27(26):576580.,,,.2004..,29(2):177181.,,,.2005a.AVO.,48(6):14751486.,.2005b..50(1):131137.,,.2006..(),25(1):2831.ChenH,CastagnaJP,BrownRL,etal.1999.Three2parameterAVOcrossplottinginanisotropicmedia.69thSEGmeetingExpandedAbstracts,7376.ChengCH.1993.Crackmodelsforatransverselyanisotropicmedium.J.Geophys.Res.,98:675684.DavisTL,ShuckEL,BensonRD.1993.Coalbedmethanemulticomponent32Dreservoircharacterizationstudy,CedarHillField,SanJuanBasin,NewMexico.63thSEGmeetingExpandedAbstracts,275276.HudsonJA.1980.Overallpropertiesofacrackedsolids.Math.Proc.CambridgePhilos.Soc.,88:371384.HudsonJA.1981.Wavespeedsandattenuationofelasticwavesinmaterialcontainingcracks.Geophys.J.R.Astron.Soc.,64:133150.KellyM,SkidmoreC,FordD.2001.AVOinversion,Part1:Isolatingrockpropertycontrasts.TheLeadingEDGE,20(3):320323.PengSP,ChenHJ,YangRZ,etal.2006.FactorsfacilitatingorlimitingtheuseofAVOforcoal2bedmethane.Geophysics,71(4):4956.RamosACB,DavisTL,AndersonJE,etal.1994.AVOanalysisandmodelingappliedtofracturedetectionincoalbedmethanereservoirs,CedarHillField,SanJuanBasin,NewMexico.64thSEGmeetingExpandedAbstracts,244247.RamosACB,DavisTL.1997.32DAVOanalysisandmodeling12312008appliedtofracturedetectionincoalbedmethanereservoirs.Geophysics,62(6):16831689.RiedelM,DossoSE,BeranL.2003Uncertaintyestimationforamplitudevariationwithoffset(AVO)inversion.Geophysics,68(5):14851496.RussellBH,HedlinK,HiltermanFJ,etal.2003.Fluid2propertydiscriminationwithAVO:ABiot2Gassmannperspective.Geophysics,68(1):2939.ShuckEL,BensonRD,DavisTL.1993.Analysisofshear2wavepolarizationsfromanine2component32Ddataset,CedarHill,NewMexico.63thSEGmeetingExpandedAbstracts,271274.ShuckEL,DavisTL,BensonRD.1996.Multicomponent32Dcharacterizationofacoalbedmethanereservoir.Geophysics,61(2):315330.SkidmoreC,KellyM,CottonR.2001.AVOinversion,Part2:Isolatingrockpropertycontrasts.TheLeadingEDGE,20(4):425428.IdentificationandForecastingofDifferentStructuralCoalsbyP2waveandS2wavefromWell2loggingPENGSuping,DUWenfeng,YUANChunfang,GOUJingwei,HEBingshouStateKeyLaboratoryofCoalResourceandSafetyMining,ChinaUniversityofMiningandTechnology(Beiji