页岩气偏心水平井气侵期间岩屑运移数值模拟  

Numerical Simulation of Cuttings Transport during Gas Invasion in Eccentric Horizontal Wells of Shale Gas

作　　者：姜瑞海 崔云峰 张晨 陈勋 JIANG Ruihai;CUI Yunfeng;ZHANG Chen;CHEN Xun(School of Mining Engineering,North China University of Technology,Tangshan Hebei 063200,China)

机构地区：[1]华北理工大学矿业工程学院,河北唐山063200

出　　处：《科技和产业》2022年第6期283-289,共7页Science Technology and Industry

基　　金：华北理工大学创新训练计划项目(X2021195)。

摘　　要：为揭示页岩气偏心水平井气侵期间岩屑运移规律,基于欧拉多相紊流计算模型,研究钻井液排量与黏度、气体侵入量、岩屑粒径、入口岩屑含量对气侵期间偏心度为0.75的环空岩屑分布的影响。结果表明,气侵期间上述因素均会对偏心环空岩屑分布造成不同程度的影响,随岩屑粒径与入口岩屑含量的增大、钻井液排量与黏度的减小,环空出口底部岩屑床厚度增加,气体侵入量安全范围内对岩屑分布影响甚微,随其增大,岩屑床厚度稍有上升。In order to reveal the rule of cuttings transport during gas intrusion in shale gas eccentric horizontal wells,the effects of drilling fluid displacement,viscosity,gas intrusion,cuttings size and inlet cuttings content on cuttings distribution in the annulus with eccentricity of 0.75 during gas intrusion are studied by Eulerian multiphase turbulence calculation model.The results show that all of the above factors affect the distribution of eccentric annulus cuttings to different degrees during gas intrusion,the thickness of the cutting bed at the bottom of the annulus outlet increases with the increase of cuttings size and cuttings content,and the decrease of drilling fluid displacement and viscosity,the gas intrusion has less effect on the distribution of cuttings within the safe range,and the thickness of the cutting bed increases slightly with its increase.

关 键 词：页岩气水平井 气侵 偏心环空 岩屑运移 多相紊流 

分 类 号：TE254[石油与天然气工程—油气井工程]