%0 Journal Article
%T 不同煤储层渗透率下煤层气直井极限产气量的确定
%A 倪小明
%A 朱阳稳
%A 王延斌
%A 胡海洋
%J 煤炭科学技术
%P 72-75
%D 2015
%X Inordertofindoutthelimitproductionvalueofacoalbedmethanewellundertheconditionofdifferentcoalreservoirpermeabilityandtoensurethesustainablestablehighproductionofcoalbedmethane,accordingtothecoalreservoirgeometricmodel,therelationshipbetweenthestartpressuregradientandpermeabilityandthegaswelltest,seepagetheoryandincombinationwiththelabmeasuringandtest,alimitproductionvaluemathematicmodelofthecoalbedmethaneverticalwellundertheconditionofdifferentcoalreservoirpermeabilitywasestablished.TheverifiedresultsofShizhuangBlockexplorationdevelopmentinformationshowedthatwhenthelimitproductionvaluewasclosetotheaverageproductionvalueoftheproductionpeak,withtherationalcontrolofthegasproduction,thestableproductionperiodcouldbekeptinsustainableandhighproduction.Whenotherconditionswerethesame,thelimitproductionvaluewouldbeincreasedinpowerwiththepermeabilityincreasedandwouldbeincreasedinindexwiththewaterproductiontimeofthesinglephasewaterflowstageexpanded.Whenthecoalreservoirpermeabilitywasrelativelylow,topossiblyexpandthewaterdrainagetimeatthesinglephasewaterflowstagewouldbeakeymeasuretoimprovethegasproductionvalueofthecoalbedmethanewell.
%K coalbed
%K methane
%K permeability
%K limit
%K production
%K value
%K start
%K pressure
%K gradient
%U http://www.mtkxjs.com.cn/CN/abstract/abstract10099.shtml