李彦龙;董长银;李怀文;邵力飞;陈新安;

• 1:中国石油大学(华东)石油工程学院

• 2:中国石油大港油田公司石油工程研究院

摘要(Abstract)：

有关疏松砂岩油藏水平井塑性破坏半径的研究没有考虑高温交变应力对近井岩石塑性破坏过程的影响.分析热采复杂条件下的水平井近井地层应力分布规律,提出基于不同岩石破坏准则的近井塑性破坏半径预测方法.结果表明,井壁处的塑性屈服函数值越大,井壁破坏程度越大,出砂越严重,塑性屈服函数的零点即为塑性破坏半径.井底温度越高,塑性破坏半径越大.塑性破坏半径受原地主应力顺序、井周角、方位角、井底流压等因素影响.当垂向主应力大于水平主应力时,垂直方向上的塑性破坏半径最大;反之,水平方向上的塑性破坏半径最大.当水平井方位角为0°(或180°)时,井周塑性破坏半径最大;当水平井方位角为90°(或270°)时,井周塑性破坏半径最小.该研究成果对于热采水平井出砂预测有一定的指导意义.

关键词(KeyWords)：塑性破坏半径;出砂预测;热采;水平井;近井应力;出砂半径

Abstract:

Keywords:

基金项目(Foundation):国家自然科学基金项目(51374226)

作者(Author):李彦龙;董长银;李怀文;邵力飞;陈新安;

Email:

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