赵欢;李玮;强小军;刘赛;苏崭;

• 1:东北石油大学石油工程学院
• 2:长庆油田分公司第五采油厂
• 3:新疆油田公司实验检测研究院

摘要(Abstract)：

为研究多裂缝扩展时应力干扰下裂缝延伸规律及形态影响因素,应用扩展有限元方法,结合断裂力学最大主应力断裂准则,建立多裂缝扩展的流固耦合模型。结果表明:多裂缝扩展方向在近井带相互排斥,且随液体的注入,裂缝的长度和宽度变大,受地层滤失影响,裂缝增长速度逐渐减小。裂缝形态受岩石力学参数及工程因素影响,当弹性模量较大时,裂缝扩展长度和宽度有所增加;当泊松比较大时,易形成中间长、两侧短的裂缝形态;当地应力差较小时,两侧裂缝转向角度较大。裂缝间距越小,裂缝间扩展时相互竞争越激烈;注入速度越大,裂缝尺寸越增加。该结果为油田合理制定施工方案、提高油气采收率提供依据。

关键词(KeyWords)： 水力压裂;多裂缝;扩展有限元;岩石力学参数;施工参数

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(51774093)

作者(Author): 赵欢;李玮;强小军;刘赛;苏崭;

Email:

DOI:

参考文献(References)：

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