矿物纤维低密度水泥石力学性能研究

罗洪文; 李早元; 程小伟; 易亚军; 林銮

doi:10.3969/j.issn.1001-5620.2015.02.020

矿物纤维低密度水泥石力学性能研究

doi: 10.3969/j.issn.1001-5620.2015.02.020

西南石油大学油气藏地质与开发国家重点实验室, 成都

详细信息

作者简介:
罗洪文,1984年生,毕业于西南石油大学,现在主要从事固井水泥浆及材料体系研究。地址:四川省成都市新都区西南石油大学国家重点实验室B104;邮政编码610500;电话13540883450;E-mail:124628144@qq.com。

中图分类号: TE256.6
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出版历程
- 收稿日期: 2014-11-11
- 刊出日期: 2015-03-31

Study on Mechanical Performance of Low Density Mineral Fiber Set Cement

State Key Laboratory B104, Southwest Petroleum University, Chengdu, Sichuan 610500, China

摘要

摘要: 目前低密度水泥石多存在韧性不足、抗拉强度、抗折强度低等问题,给低密度水泥浆在深井、超深井井筒完整性带来忧患,因此改善低密度水泥石力学性能具有重要的意义。通过考察抗压强度、抗拉强度、抗折强度、弹性模量,对新型材料玄武岩纤维和目前现场常用的聚丙烯纤维改善水泥石力学性能的效果进行了对比。结果显示:在较低加量范围内玄武岩纤维对水泥浆流动性影响不大,可以和聚丙烯纤维一样显著降低水泥浆API失水和自由水含量,提高水泥石的抗压和抗折强度,显著提高水泥石的抗拉强度,在掺量为0.5%时可使水泥石抗拉强度提高50%;同时可以降低水泥石弹性模量,提高水泥石的韧性。玄武岩具有较好的经济适用性,在油气井固井中有较大的开发应用潜力。
- 低密度水泥浆 /
- 长封固段固井 /
- 增韧剂 /
- 矿物纤维 /
- 力学性能
Abstract: Excellent mechanical performance of set cement is required in cementing wells of 6000m and deeper using one-stage cementing technology. Improvement of mechanical performance of set cement plays an important role in maintaining the integrity of cemented hole. Comparison of polypropylene fiber and basalt fiber in in improving the mechanical performance of set cement was conducted by analyzing the changes in compressive strength, tensile strength, breaking strength and elastic modulus of set cement. It showed that at low concentrations basalt fiber has little effect on the flow properties of cement slurry, and, like the polypropylene, it remarkably reduces the API filtration rate and free water content of cement slurry. Cement slurry treated with basalt fiber gives set cement of enhanced compressive, tensile and breaking strengths. At a concentration of 0.5%, the tensile strength of set cement is increased by 50%, with an obvious decrease in the elastic modulus of the set cement. As an economical cement slurry additive, basalt will find wider application in oil and gas wells cementing.
- Low density cement slurry /
- Long interval cementing /
- Toughening agent /
- Mechanical performance /
- Mineral fiber

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参考文献(7)

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