打孔衬管完井渗流场的有限元分析  

The Finite Element Analysis about Seepage Flow of Perforated Liner Completion

作　　者：郭衍茹 魏臣兴 练章华[2] 马如然 王强[3] 

机构地区：[1]中国石油渤海钻探工程技术研究院,天津300475 [2]西南石油大学油气藏地质及开发工程国家重点实验室,成都610500 [3]中国石油渤海钻探第三钻井公司,天津300280

出　　处：《重庆科技学院学报（自然科学版）》2015年第2期48-51,共4页Journal of Chongqing University of Science and Technology：Natural Sciences Edition

基　　金：国家科技重大专项"复杂地层漏失诊断及完井方法研究"(2011ZX05005-006-008HZ)

摘　　要：研究元坝地区海相碳酸盐岩气藏打孔衬管完井渗流规律,在充分考虑真实天然气的偏差因子、密度以及黏度随压力变化情况的基础上建立渗流数学模型;同时利用COMSOL Multiphysics软件对该模型进行求解计算,获得打孔衬管完井方式下近井壁的渗流场分布。研究表明:衬管完井渗流场中从供给边界到井底之间压力表现为明显的"压降漏斗"趋势,与常规解析解趋势相一致;当气体在远离井筒位置时渗流速度很小并且流速接近稳定,在井筒附近区域渗流速度分布呈波浪式,其中两端的渗流速度最大,为速度敏感性分析的重点。This thesis focuses on the marine carbonate gas reservoirs＇ perforated liner completion seepage law of Yuanba area,and considering the real gas deviation factor,density,and viscosity based on pressure,it also established the mathematical model. With the help of COMSOL Multiphysics software,the model could carry on seepage calculation,and then get near well seepage field distribution of perforated liner completion. The research obtained that the pressure change obviously shown as cone of depression from supply boundary to hole bottom,consistent with the trend of conventional analytical solution. When the gas in the wellbore location away from the flow rate of the flow velocity is small and close to stable,near-wellbore region wavy flow velocity distribution in which the maximum flow velocity at both ends,with emphasis on the speed of the sensitivity analysis.

关 键 词：碳酸盐岩 打孔衬管完井 有限元 渗流场 

分 类 号：TE358[石油与天然气工程—油气田开发工程]