西南石油大学学报(自然科学版)

• 博导论评 • 上一篇    

元坝气井射孔完井近井壁渗流场分析

练章华1,丁士东2,赵旭2,郑建翔1,3,罗文浩1   

  1. 1.“油气藏地质及开发工程”国家重点实验室西南石油大学,四川成都610500
    2. 中国石化石油工程技术研究院,北京朝阳100101
    3. 中国石化华东石油工程有限公司固井分公司,江苏扬州225101
  • 出版日期:2013-12-01 发布日期:2013-12-01
  • 基金资助:

    国家“十二五”重大专项专题“复杂地层漏失诊断及完井方法研究”(2011ZX05005–006–008HZ)。

Analysis of the Fluid Flow Field Near Wellbore Wall of
Gas-well Perforated Completion in Yuanba

Lian Zhanghua1, Ding Shidong2, Zhao Xu2, Zheng Jianxiang1,3, Luo Wenhao1   

  1. 1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitaion,Southwest Petroleum University,Chengdu,Sichuan 610500,China
    2. Research Institute of Petroleum Engineering Technology,SINOPEC,Chaoyang,Beijing 100101,China
    3. Cementing Branch Company,Huadong Petroleum Engineering Company,SINOPEC,Yangzhou,Jiangsu 225101,China
  • Online:2013-12-01 Published:2013-12-01

摘要:

川东元坝地区主要为超深水平井气井,超深井井底高温、高压下,近井壁天然气的密度、黏度和压缩系数随压
力的变化而变化,是一个复杂的流场问题,很难用解析解研究射孔完井近井壁的渗流场问题,用COMSOL Multiphysics
多物理场软件建立了元坝气井射孔完井近井壁渗流场分析的三维有限元模型,模型中包含了井眼尺寸、孔深、孔径、孔
密、相位角、钻井污染程度、渗透率、流体密度、黏度以及压缩系数等,可以方便地调整任意参数,得到相应的近井筒渗
流场的分布规律。根据建立的渗流场有限元模型,详细分析了不同相位角、不同孔密时,近井筒渗流场的相互干扰情
况,为水平井气井射孔完井参数优化设计提供了理论依据。

关键词: 水平井气井, 射孔完井, 近井壁, 流场分析, 有限元

Abstract:

The wells in Chuandong Yuanba are mainly extra-depth horizontal gas wells. Because the density,viscosity and
compressibility coefficient of nature gas vary with the temperature and pressure,the problems of the fluid flow field near
wellbore wall of the gas-well perforated completion are not solved with the analytical method. In the paper,the 3D fluid
flow finite element model(FEM)near the wellbore wall is established with the COMSOL Multiphysics software. The model
includes the wellbore size,perforation depth,perforation diameter,perforation density,phasing angle,drilling damage degree,
permeability,gas density,viscosity as well as compressibility coefficient,and so on. We can change the arbitrary parameter
to get the distribution of the fluid flow field near the wellbore wall. Based on the fluid flow model in the paper,the reciprocal
interference near wellbore fluid flow field under the different phasing angles and different perforation density was analyzed in
details. It provides the theoretical supports for the optimal design of the perforated completion parameters in horizontal gas
well.

Key words: horizontal gas well, perforated completion, near the wellbore wall, analysis of the fluid flow field, FEM