闫炎;管志川;赵效锋;杨才;

• 1:中国石油大学(华东)石油工程学院

• 2:山东省深地钻井过程控制工程技术研究中心

• 3:中国石化中原油田分公司石油工程技术研究院

• 4:中国石油长城钻探工程有限公司国际测井公司

摘要(Abstract)：

为解决射孔完井作业中固井水泥损伤问题,建立射孔弹侵彻井筒数值模型,基于LS-DYNA有限元软件,计算射孔段固井水泥的力学响应,分析固井水泥射孔力学响应特征;利用射孔弹侵彻实验,确定射孔后固井水泥的损伤特征,研究水泥抗压强度、抗拉强度、剪切模量对射孔过程中水泥等效应力峰值影响规律。结果表明:射孔弹起爆后形成的应力波初期振荡减小,随后逐渐趋于稳定。固井水泥应力峰值位置出现在水泥第一界面上孔道表面。在射孔过程中,孔道周围首先出现主裂纹,而后在孔道附近出现网状微裂纹。随水泥抗拉强度、抗压强度的增加,固井水泥等效应力峰值增加。随水泥剪切模量的增加,固井水泥等效应力峰值降低。为提高水泥抗冲击能力,建议选取高强度、低剪切模量固井水泥。

关键词(KeyWords)：射孔;固井;水泥;应力波峰值;裂缝;力学参数

Abstract:

Keywords:

基金项目(Foundation):中国海洋石油总公司科技重大项目(CNOOC-KJ 135ZDXM 24LTD ZJ 01)

作者(Author):闫炎;管志川;赵效锋;杨才;

Email:

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