玄武岩纤维对铝酸盐水泥石性能的影响  

Effects of basalt fiber on the performance of aluminate cement stone

作　　者：程小伟[1] 张明亮[1] 杨永胜[1] 龙丹[1] 李早元[2] 郭小阳[1,2] 

机构地区：[1]西南石油大学材料科学与工程学院 [2]西南石油大学油气藏地质及开发工程国家重点实验室

出　　处：《石油钻采工艺》2016年第1期42-47,共6页Oil Drilling & Production Technology

基　　金：高等学校博士学科点专项科研基金"硅酸盐-磷铝酸盐水泥水化产物与其在高酸性环境下的腐蚀行为研究"(编号:20115121120006);四川省教育厅科技项目"等离子改性废旧橡胶增强油井水泥石韧性机理研究"(编号:13ZA0182);西南石油大学油气田材料重点实验室开放基金(编号:x151514kcl10)

摘　　要：为进一步改善稠油热采井固井用铝酸盐水泥石的性能,研究了玄武岩纤维对水泥石性能的影响。通过测试水泥浆工程性能、水泥石力学性能及渗透性,结合扫描电镜(SEM)分析其微观结构,探讨了玄武岩纤维增强铝酸盐水泥石力学性能的作用机理。结果表明:铝酸盐水泥中掺入适量的玄武岩纤维,低温常压环境下,水泥浆的工程性能变化不大,纤维水泥石力学性能有效提高,具有明显的韧性;高温高压环境下,纤维水泥石强度、渗透性保持稳定,具有良好的耐高温性能。观察水泥石微观形貌并分析纤维作用机理发现:铝酸盐水泥石中的玄武岩纤维稳定存在,水泥石的微观孔结构得到改善,微裂纹的产生和发展得到控制,纤维与水泥水化产物紧密黏结,起到了阻裂作用,纤维脱离黏结和拔出,增加了水泥石的断裂能,从而实现了玄武岩纤维对固井用铝酸盐水泥石性能的改善。In order to further improve the performance of aluminate cement stone used for cementing in heavy oil thermal recovery wells, this paper studies the effects of basalt ifber on the performance of cement stone. Through the measurement of cement slurry engineering performance, mechanical properties and permeability of cement stone, and combined with scanning electron microscope (SEM) to analyze the microstructure, this paper explores the functional mechanism of basalt ifber reinforced aluminate cement stone. The results show that, after adding appropriate amount of basalt ifber into aluminate cement and at low temperature and normal pressure environment, the engineering performance of the cement slurry does not change much, the mechanical properties of the ifber modiifed cement stone are signiifcantly improved and have obvious toughness. Under high temperature and high pressure, strength and permeability of ifber modiifed cement stones remain stable, and the ifber cement stone has good high temperature resistance. By observing the microstructure of cement stone and analyzing the functional mechanism of ifber, it is found that basalt ifber maintains stable in aluminate cement stone, the microscopic pore structure of cement stone has been improved, the emergence and development ofmicro-cracks is under control, the ifber and cement hydration products are bonded tightly, which resists cracking. Fiber breaking away from bonding and being pulled out increases the cement fracture energy, hence improving the performance of aluminate cement stone used in cementing by basalt ifber as a toughening material.

关 键 词：固井 铝酸盐水泥 玄武岩纤维 力学性能 微观形貌 稠油热采 

分 类 号：TE256[石油与天然气工程—油气井工程]