致密砂岩气藏气体钻井高效建产的机理分析及展望

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Mechanism Analysis and Prospect of EfficientProduction of Gas Drilling in Tight Sandstone Gas Reservoirs

LI Gao1，2*， ZHANG Yil， LI Hongtao1，2， MENG Yingfeng1，²， YANG Xu1，2

1.State KeyLbatoryolandGsReseiologdExpoatioothstPetroUivesityeda 2.UnderbaledGailibotalEeacteOililpletod Sichuan 610500， China

Abstract： Gasdrilingforthedevelopmentoftightsandstone gasreservoirs isof naturaladvantages inavoidingreservoir damage.However，thelackofclearunderstandingofitsmechanisms introduces uncertaintiesregarding itsabilitytoachieve efficient production.Toaddress this isse，a systematic review was conductedonthe experiences and lessons learmed from gas drillngforthedevelopmentoftightsandstone gasreservoirs.TegasdrillngpracticesintheDibeiandwesternSichuanegions were usedas examples.Basedondrillng monitoringdatasuchas methane concentrationandoutlethumidityandthroughthe analysis ofcuttings X-ray diffraction and logging datathe mechanisms foreffcient production were examined.The study revealedthatproductivegaspoints inhgh-yieldwelscoespondedtotheheightofthesandstone-shalelithologicalinterface， confirming that thederivedfracture networksystemserves as te primary gasstorage spaceand gasproductionpathwaymaking it a crucial targetfor welboretrajectory. Influencedbyfault zones，waterfromthelowerpartofaquiferscould migrate tothe upper part ofthe faultdrop Zone.Therefore，welldeployment should be basedonhigh structural pointsandfaultuplift zones， taking intoaccountreservoir evolutionandtectonic movementhistoryforoptimization.Itis believedthat furtherin-depth researchinengineeringgeologicalmechanics isneeded，focusingontheeffctivenessof ithological interfacefractures，the relationshipbetweegasand water inaquifers，andtheirimpacts.Additionallythedevelopment of gas drilingandcompletion techniquesand tools for complex environments should be pursued.

Keywords：tightsandstone gasreservoir; gasdriling; lithological interface; wellboredeployment; reservoir protection 网络出版地址：http：//kns.cnki.net/kcms/detail/51.1718.TE.20250707.1637.006.html

引言

致密砂岩气藏由于低孔低渗、黏土矿物改造作用强等特征显著，常规过平衡和液基欠平衡钻并技术极易损害储层。（剩余14271字）