矿物纤维增强覆膜砂的界面力学模型研究

陈诚; 姚晓; 武明鸣; 宋金波

doi:10.3969/j.issn.1001-0890.2014.04.016

矿物纤维增强覆膜砂的界面力学模型研究

陈诚¹,
姚晓^1, ,,
武明鸣²,
宋金波²

1.
南京工业大学材料科学与工程学院, 江苏南京 210009;
2.
中国石化胜利油田分公司采油工艺研究院, 山东东营 257000

基金项目:

中国石油化工股份有限公司前瞻性项目“纤维在防砂堵调领域可行性研究”（编号：P13045）和江苏高校优势学科建设工程项目资助。

详细信息

作者简介:
陈诚（1988- ），男，江苏盐城人，2012年毕业于扬州大学高分子材料与工程专业，在读硕士研究生，主要从事油田化学材料方面的研究。

通讯作者:
联系方式：（025）83587253，chzhw1988@sina.com。：姚晓，yaoxiao@njut.edu.cn。系本刊编委。

中图分类号: TE358⁺.1
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出版历程
- 收稿日期: 2014-02-22
- 修回日期: 2014-06-02
- 刊出日期: 1899-12-31

Interface Mechanical Model of Mineral Fiber-Resin Coated Sand

1.
College of Materials Science and Engineering, Nanjing Technology University, Nanjing, Jiangsu, 210009, China;
2.
Oil Production Technology Research Institute, Shengli Oilfield Branch, Sinopec, Dongying, Shandong, 257000, China

摘要

摘要: 为深入了解纤维复合防砂技术中纤维复合砂体的增强作用机理，对纤维与覆膜砂表面树脂层的界面性质进行了研究。基于纤维增强复合材料的剪滞理论模型，对单纤维-树脂层微元体进行了界面力学分析；根据矿物纤维覆膜砂体的特征，对剪滞理论模型进行了修正，建立了可定量计算纤维覆膜砂体抗压强度的剪滞理论力学模型。研究发现，覆膜砂体具有宏观颗粒多孔特征和树脂反应收缩产生的大量微裂缝和微孔隙，使砂体应力集中，导致其在60和80 ℃温度下的抗压强度分别为2.75和8.88 MPa；矿物纤维与覆膜砂体为点接触，每个接触点的有效粘结长度为0.3 mm左右；覆膜砂体中加入0.2%矿物纤维后，纤维复合砂体的抗压强度比空白砂体提高了0.92 MPa。研究结果表明，最大剪应力与纤维有效粘结长度呈双曲正切函数关系，纤维有效粘结长度等于所用覆膜砂粒的半径，修正模型从界面力学的角度解释了纤维增强覆膜砂的作用机理，并可在较小误差范围内定量计算适当纤维掺量下纤维复合砂体的抗压强度。
- 纤维 /
- 防砂 /
- 覆膜砂 /
- 增强机理 /
- 力学分析 /
- 界面力学
Abstract: To further understand the enhancement mechanism of the fiber-resin coated sand control technique,the interfacial mechanical properties of fiber and resin coat were analyzed.The shear-lag model of fiber-reinforced composites was used to analyze the interfacial mechanics of single fiber-resin infinitesimal element.Then,this model was modified according to the characteristics of the mineral fiber-resin coated sand,into a shear-lag mechanical model that could quantify the compressive strength of the fiber-resin coated sand.SEM showed that there were a large number of micro-cracks and micro-pores resulting from resin shrinkage and pellet porous structure,which enabled the stress concentration in the sand body and made its compressive strength only 2.75 MPa(60 ℃)and 8.88 MPa(80 ℃).Point contact existed between mineral fiber and resin coated sand,with net bond length approximately 0.3 mm at each point.The compressive strength of the fiber-resin coated sand with 0.2% mineral fibers was 0.92 MPa higher than that of blank sample.The results proved that there was a hyperbolic tangent function relationship between the maximum shear stress and the effective bond length of fiber,and the effective bond length of fiber was equal to the radius of the resin coated sand.The modified model provided a more reasonable explanation of mechanism of the fiber-resin coated sand from the perspective of interface mechanics,and allowed the quantitative calculation of the compressive strength of fiber-resin coated sand with a appropriate fiber content in a small error range.
- fiber /
- sand control /
- resin coated sand /
- enhancement mechanism /
- mechanical analysis /
- interface mechanical

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参考文献(16)

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