油田固井用S90纤维复配材料增韧性能及作用机理  

Toughening property and mechanism of fiber composite material S90 for cementing

作　　者：华苏东[1] 姚晓[1] 杜峰[2] 

机构地区：[1]南京工业大学材料科学与工程学院,江苏南京210009 [2]南京工业大学城市建设与安全工程学院,江苏南京210009

出　　处：《南京工业大学学报（自然科学版）》2009年第6期7-11,共5页Journal of Nanjing Tech University(Natural Science Edition)

基　　金：国家高技术研究发展计划(863计划)资助项目(2003AA327120);江苏省博士后基金资助项目(0702033C)

摘　　要：油井水泥石固有的脆性使井下水泥环受射孔弹高能聚流的作用,形成宏观裂纹.S90纤维复配材料降低水泥石的弹性模量,显著提高水泥石的韧性.将S90纤维复配材料分数在水泥浆中,测试水泥石试样的抗拉强度、抗拉断裂能、静态和动态弹性模量以及动态泊松比.结果表明:与净浆相比,S90体系水泥石抗拉强度和抗拉断裂能分别提高了30.1%和46.6%,静态、动态弹性模量分别降低了11.6%、8.17%,动态泊松比增加了2.53%.S90体系中高弹模微纤维起阻裂作用,低弹模长纤维起增韧作用.Sheath would crack when it was exposed to high energy convergence of perforating charge for connatural brittleness. Fiber composite material （S90） could decrease the Young＇s modules of set cement and increased the toughness. S90 was dispersed in the cement and the tensile strength, the tensile rupture energy, Young＇s modules and Poissons ratio were tested. As results, compared with neat slurry set cement, the tensile strength and the anti-crack energy of set cement with S90 were increased by 30. 1% and 46.6%, the Young＇s modules were decreased by 11.6% and 8. 17%, and the Poisson＇s ratio was increased by 2.53%. High module fibers of S90 system resisted the early micro-crack to extend, and long fibers of S90 system with low module prevented the later long crack extending.

关 键 词：固井 油井水泥 纤维 韧性 抗拉强度 

分 类 号：TQ172.4[化学工程—水泥工业]