頁巖氣井水平段起伏特征對積液分布的影響
打開文本圖片集
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
網(wǎng)絡(luò)出版地址：http：//ink.cnki.net/urlid/51.1718.TE.20240927.1400.018
引言
隨著全球經(jīng)濟的迅速發(fā)展，各國家對能源的需求逐年增加，近年來，頁巖氣已經(jīng)成為中國天然氣領(lǐng)域增儲上產(chǎn)的主力資源，占據(jù)油氣能源開采的重要地位[1-2]。（剩余13613字）