温度及外加剂对G级油井水泥水化产物的影响  

Effect of temperature and additives on hydration products of Class G oil well cement

作　　者：张景富[1] 朱健军[1] 代奎[1] 佟卉[1] 姜涛[2] 

机构地区：[1]大庆石油学院石油工程学院 [2]大庆油田有限责任公司总经理办公室

出　　处：《大庆石油学院学报》2004年第5期94-97,共4页Journal of Daqing Petroleum Institute

摘　　要：利用X射线衍射仪检测和分析了25～200℃条件下G级油井水泥水化产物.揭示了温度及外加剂等对G级油井水泥水化产物的影响.结果表明:温度超过110℃后,主要水化硅酸钙产物由CSH(Ⅱ),C2SH2等凝胶转变为C2SH晶体;温度为110～150℃时掺加硅砂的水泥,主要水化硅酸钙产物为C5S6H5;而当温度超过150℃时,主要水化硅酸钙产物为C6S6H.此外,给出了不同温度条件下G级油井水泥水化过程的化学反应式.Hydration product composition of class G oil well cement are tested and analyzed by using XRD at the temperature range of 25～200 ℃. Effects of temperature and additives on the hydration products of class G oil well cement are revealed. For clean cement slurry (without additives), the major products changed from CSH(Ⅱ), C_2SH_2, C_3S_2H_3 to C2SH when temperature exceeded 110 ℃, and for cement slurry with silica sands, the major products changed to be C_5S_6H_5 (110～150 ℃) and C_6S_6H (>150 ℃) respectively. Chemical reaction formula of the hydration for major clinker minerals of class G oil well cement are established, which can be used to describe the results of hydration. The mechanism of hydration of silica sand is given.

关 键 词：G级油井水泥 水化反应 温度 外加剂 水化硬化 水化产物 

分 类 号：TQ172.5[化学工程—水泥工业] TE254.1[化学工程—硅酸盐工业]