沁水盆地低渗透煤层气渗流数值模拟研究及应用

《沁水盆地低渗透煤层气渗流数值模拟研究及应用》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、北京交通大学硕士学位论文沁水盆地低渗透煤层气渗流数值模拟研究及应用姓名：赵继申请学位级别：硕士专业：工程力学指导教师：兑关锁20080601ABSTRACTCoalbedmethanewhichCanreplacenaturalgasisakindofefficientandcleanenergySOUl'Ce．Exploitingandusingcoalbedmethanehaveanimportantsignificanceformakingfulluseofcleanenergysource，improvingtheconditionofcoalminepr

2、oductionandprotectingatmosphericenvironmentthatpeoplesurvivein．Ourcountryisrichincoalbedmethanesource．However,becausecoalbedmethanereservoiriscomplex，permeabilityislowandcoal—sealngasseepagevelocityisslow，classicalpercolationtheoryisnotsuitableforcomplexflowinglaw．Onthebasisofthedomes

3、ticandabroadliteraturesresearches，themechanismsofthestoring；migratingandproducingforcoalbedmethaneandthecomplexexploitingprocedureofcoalbedmethaneareanalyzed，especiallythesituationoflowpermeabilityinourcountryisconsidered，adual-porosity,fluid—solidcouplingmodelforsimulatingmethaneprod

4、ucingprocessisdeveloped．ThismodelintroducedtheLangmuirisothermalabsorptiontheory,thefirstFicktheorytoconsidertheabsorptionanddiffusionofcoalbedmethane．Then，thiscomplexmathematicalmodelisapproximatedandsolvedbyIMPES(Implicitpressureandexplicitsaturationmethod)．CoalbedmethaneSimulatione

5、xecutableprogramiswrittenthroughrewritingtheblackoilprogram-boastwithFORTRANSOI／I'CCcode．ThedataofcoalbedmethanewellsofJinShi1，whichiS10catedin3群coalseamofQinshuibasininShanxiProvince，wasusedtoprovethereliabilityofthismodel．Andthisprogramisusedforthehistorymatchandproductiontrendforec

6、astingofcoalbedmethaneandwater．Besides，underthelowpermeabilitycondition，theaffectionofstart·uppressuregradienttotheproductionofcoalbedmethanewellisconsidered．Thus，start—uppressuregradientisasignificantfactorforseepagenumericalsimulationofcoalmethanewithlowpermeability．Besides，througha

7、nalyzingthedata,asoftwarewhichcompiledbyVisualBasicweresetup．AndthisisconvenientforthedrainageworkofQinshuibasin．KEYWORDS：CoalMethane；LowPermeability；Fluid-solidCoupling；NumericalSimulation；start—upPressureGradient；Water-yieldDiscipline；Drainage；独创性声明本人声明所呈交的学位论文是本人在导师指导下进行的研究工作和取得的研究

8、成果，除了