地应力对煤层渗透性的影响

194Vol.19,No.4()JournalofLiaoningTechnicalUniversity(NaturalScience)20008Aug.,2000:1008-0562(2000)04-0353-031,2,3(1.,411201;2.056004;3.),,,,;;P618.11:A1999-12-02,,1962,,:0,,,,,,,,,,,,,,,1,Enever(1997),[1],KöK0=e3C$RKöK0;C;$RMckee(1998),,,[2]HarpalaniMcPherson[3],38.1mm,86.2mm;-15013h,,7MPa,3,225mm,25cm©1995-2003TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.,,,;,,,,,,(48.956.6)812h,,,,,,[4],10,23,,,,6.022.7MPa,817MPa1200m1000m[4],,[4],(1)12.0MPa,0.01716.17md,2.41md12.0MPa,0.0020.44md,0.10md,1Fig.1TherelationshipbetweenthesmalleststressandthepermeabilityofcoalbedinChina2Fig.2TherelationshipbetweentheeffectivestressandthepermeabilityofcoalbedinChina,[5],(2),,,7.0MPa,0.01316.17md,1.72md7.0MPa,0.0020.44md,0.117md,,,8.6MPa,12.9516.28MPa,,,,,23[4],3,110MPa,33md;80110MPa,312md;,2065MPa,30.2md453()19©1995-2003TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.3,,,,,,,,,,,,,,,,,,:,;,,,,,,,[6],Harpalani[6],,,,2067kPa,,,,,,,,,,,,1md,,,,,4,,,,,,,,,,1J.R.E.Enever,A.Henning,TheRelationshipBetweenPermeabilityandEffectiveStressforAustralianCoalandItsImplicationswithRespecttoCoalbedMethaneExplorationandReservoirModellingM,Proceedingsofthe1997IntermationalCoalbedMethaneSymposium,1997,1322.2McKee,C.R.,A.C.BumbandR.A.Koenig,Stress2DependentPermeabilityandPorosityofCoalM,RockeyMountainAssociationofGeologist,1988:p.14321533,.,M:.1996.75834,,..M:,1998.951505,.M.:,1997.1276,.M.:.1998.94104EffectofIn2situStressonCoalbedPermeabilityHEWei-gang,TANGShu-heng,XIEXiao-dong(XiangtanInstituteofTechnologyXiangtan,China)AbstractTheinformationfromChinaandabroadindicatesthatin2situstresshasremarkableeffectoncoalbedpermeability.Fromtheanalysesofthedataoflaboratoryandtest,itisfoundthatcoalreservoir’spermeabilityofChinahaveanindexrelationshiptoin2situstress.Tosomeextent,thisrelationshipcanbeusedtoforecastthepermeabilityofcoalbed.Keywordsin2situstress;permeability;coalbed5534:©1995-2003TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.