Study on Seepage Model of Coalbed Methane Based

《Study on Seepage Model of Coalbed Methane Based》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、201O2ndConferenceonEnvironmentalScienceandInformationApplicationTechnologyStudyonSeepageModelofCoalbedMethaneBasedonThresholdPressureGradientWangLaiyuanSuXianboInstituteofResourcesandEnvironmentSchoolofEnergyScienceandEngineeringHenanPolytechnicUniversityHenanPolyte

2、chnicUniversityJiaozuo454000,ChinaJiaozuo454000,Chinasuxianbo@sina.comSongJinxingSchoolofEnergyScienceandEngineeringHenanPolytechnicUniversityJiaozuo454000,ChinaAbstract-DisadvantagesofthecoalseamsinChinaarelowfluidflowconsideringthethresholdpressuregradientintheper

3、meability,lowreservoirpressureandlowgassaturation,lowpenneabilityseam.whichmeanthattheclassicalseepagemodelcan'tadaptthegasreservoircompletelybecauseofvariabilityofthefluidseepage.II.EXISTENCEOFTHRESHLODPRESSUREThethresholdpressuregradientexistsduringthegasflowingin

4、GRADIENTlowpermeabilitymediabasedontheexperimentusingtheRMT-Thethresholdpressuregradientismainlyaffectedby150BRockMechanicsTestingandthecoalsamplesfrompenneabilityincoalreservoir.ThefurtherdetailedinfluenceSijiazhuangcoalmine.Forseepagemodeldecryptingthefactorsofthr

5、esholdpressuregradientareproportionofsmallcharacteristicsofthefluidmigrationaccuratelyinthelowchannelvolumeincoalsample,radiusoffIne-porethroat,permeabilityseamtoguideproductionpractices,basedonthemigrationlawofthecoalbedmethane(CBM),continuitywettabilityofreservoir

6、surface,temperature,physical-chemicalequationoffluidandDarcy'slaw,athree-dimensional,twophasereactionandtheircouplingeffects[9-10].flowseepagemodelconsideringthresholdpressuregradientisGasflowinginthelowpenneabilitycoalreservoirexistthepresentedtodescribethecharacte

7、risticsofthefluidflowinlowthresholdpressuregradientbasedontheexperimentusingthepermeabilityseam.FinallythepaperdecryptsfinitedifferenceRMT-150BRockMechanicsTestingandthe15#coalseammethodtothemodel,whichlaysfoundationfornumericalsamplefromSijiazhuangcoalmine.Therelat

8、ionbetweenthesimulationofCBMreservoir.thresholdpressuregradientandthepenneabilityisnegativeIndexTerms-thresholdpressuregradient,coalbedmet