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OALib Journal期刊
ISSN: 2333-9721
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裂缝性气藏不同完井方式渗流场分析
Keywords: 裂缝性气藏,渗流场,射孔完井,筛管完井,fem
Abstract:
？地层模型中具有多条不规则天然裂缝，有的裂缝直达井壁，有的裂缝相互贯通，造成渗流规律复杂，运用常规的解析算法很难对其进行计算求解。采用有限元方法，基于ansys软件进行建模，模型中对地层和裂缝采用同一种材料，通过引入裂缝放大系数来区分并描述裂缝对流体导流能力的增大。模型中考虑了钻井液入侵造成的井壁和裂缝污染带，通过引入污染系数来描述污染带的渗透率下降。通过模拟计算得出2种模型的渗流压力场分布、渗流速度场分布以及全井流量，并进行对比分析，为完井方式的选择提供较为直观的理论依据。
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