页岩气井水平段起伏特征对积液分布的影响
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Influence of Undulating Feature of Horizontal Section of Shale Gas Well on Liquid Accumulation
HE Zhiguo1*，GAO Shangjun1，LIU Yonghui²， ZHAO Huiyan1， ZAHNG Jing’
1.SichuanCagturalGvelopntCLdngganin;2tateKeybatoryfOd Geology and Exploitation，SouthwestPetroleum University，Chengdu，Sichuan 6O5Oo，China
Abstract：Horizontal well technologyhas been widelyusedas themaindevelopment technology inshalegasexploitation. Horizontalsectionofshalegaswellhasultra-long，complexandchangeablewell tajectoryAtthebeginningofproduction， dailygas productionand waterproductionof gas wellarelarge，and thendailygas productionand water productionrapidly decrease.Afectedbymanyfactorssuchascomplexelltrajectorylowgasproductionandlowpressure，somegaswellshave accumulatedliquidinhorizontalsection.Inordertosolvetheaboveproblems，basedonCFDsimulationtechnology，thispaper establishesboreholegeometrymodelof typicalhorizontalsectionofwels，simulatesandcalculatesgas-water two-phaseflow characteristicsand influencerulesofupset tructure inhorizontalsectionunderdifferentoperatingconditionsusingEulerianEuleriancouplingMulti-Fluid VOFmixing method.Theresultsshow that withthe increaseoffluidflowrate，the liquid holdup curveoffullboreholeinhorzontalsectionofupsettructurefluctuatestoaryingdegres，andtheconcavepontunderorehole， Attheuphillsectionofoutlet，liquidphase iseasytofallbackandcausesaccumulatedliquid.Teliquidaccumulationheight atthe downholeofthewellboreslowlydecreases withthe increaseofgasflowrate，whichcancarrytheliquidoutofthe wel bore when the gas flow rate reaches 2.2m/s .When the gas well is in low production period and the gas flow rate reaches the maximum 1.1m/s， the liquid layer height is also more than halfof the size of borehole inner diameter，and h/D is about 0.55. Keywords：shale gas well; horizontal section; undulating feature; CFD; liquid holdup
网络出版地址：http：//ink.cnki.net/urlid/51.1718.TE.20240927.1400.018
引言
随着全球经济的迅速发展，各国家对能源的需求逐年增加，近年来，页岩气已经成为中国天然气领域增储上产的主力资源，占据油气能源开采的重要地位[1-2]。（剩余13613字）