超高温弹塑性水泥浆体系研究  

Research on ultra-high temperature elastoplastic cement slurry system

作　　者：赵杨 田进 冯颖韬[2] 张浩[2] 王有伟 崔策 黄峰 汤宇童 ZHAO Yang;TIAN Jin;FENG Yingtao;ZHANG Hao;WANG Youwei;CUI Ce;HUANG Feng;TANG Yutong(Shanghai Operations Company of Oilfield Chemistry Division,China Oilfield Services Co.,Ltd.,Shanghai 200050,China;Oilfield Chemistry Research Institute of China Oilfield Services Co.,Ltd.,Sanhe Hebei 065201,China)

机构地区：[1]中海油田服务股份有限公司油田化学事业部上海作业公司,上海200050 [2]中海油田服务股份有限公司油田化学研究院,河北三河065201

出　　处：《石油化工应用》2025年第3期46-50,共5页Petrochemical Industry Application

摘　　要：针对页岩气井井底异常高温的问题,构建了一种抗超高温弹塑性水泥浆体系。该体系通过引入碳纳米管材料,配合其他外加剂形成了一套1.9 g/cm^(3)的常规密度水泥浆体系。研究了该体系的高温常规性能和高温力学性能,研究表明,在210℃、21 MPa的条件下,添加2%的碳纳米管可使体系的流动性降低8.6%。24 h水泥石抗压强度降低了3.8%,72 h水泥石抗压强度降低了2.1%。24 h抗折强度增加了41.1%,48 h抗折强度平均增加了50.9%,显著提高了水泥石抵抗外部冲击载荷的能力。机理分析表明,碳纳米管作为水泥石空间网架结构中的填充颗粒,充当外部载荷的传递介质,自身发生形变吸收部分能量缓释外部载荷对水泥石的作用力,从而提高了水泥石抵抗外部载荷的能力。A high-temperature resistant elastoplastic cement slurry system has been developed to address the issue of abnormal high temperatures at the bottom of shale gas wells.This system forms a conventional density cement slurry system of 1.9 g/cm^(3) by introducing carbon nanotube materials and combining them with other additives.The high-temperature conventional and mechanical properties of the system were studied,and the results showed that under the conditions of 210℃and 21 MPa,a 2%addition of carbon nanotubes reduced the flowability by 8.6%.The compressive strength of cement stone decreased by 3.8%after 24 h and 2.1%after 72 h.The 24 h flexural strength increased by 41.1%,and the 48 h flexural strength increased by an average of 50.9%,significantly improving the ability of cement stone to resist external impact loads.Mechanism analysis shows that carbon nanotubes,as filling particles in the spatial grid structure of cement stone,act as a transmission medium for external loads,undergo deformation and absorb some of the energy to slow down the external load on the cement stone,thereby improving the ability of the cement stone to resist external loads.

关 键 词：页岩气井 超高温 水泥石 力学性能 弹塑剂 

分 类 号：TE256.7[石油与天然气工程—油气井工程]