Study on the performance and mechanism of GH-9 oil well cement retarder
WANG Huixian
CAI Shijie
ZHANG Guangfeng
LI Yushan
DUAN Aiping
KONG Deqiang
ZHANG Bing
Abstract：The effects of GH-9 oil well cement retarder on the thickening time,rheological property and compressive strength of cement paste were studied. Through XRD,SEM,energy spectrum analysis and other methods to explore the retarding mechanism of the retarder. The results showed that when mix with the fluid loss additive and early strength agent,only 0.2% content of GH-9 can reach retarding effect with extension thickening time over 60 min. The thickening curve of cement slurry is good in shape with right angle thickening,short transition time and low initial consistency. The mixing amount and thickening time is linear. It will not adversely affect the development of the later compressive strength of cement stone. It has a very good dispersion effect in the mixing amount of more than 1%. By phase analysis and microstructure analysis,in the initial stage of cement hydration,the inhibi-tion effect of C-S-H gel on hydration products is not obvious. But it can effectively inhibit the formation and growth of Ca(OH)2 crystal,so as to delay the induction period of cement hydration,and prolong the time of thickening.
Keywords：Class G oil well cementretarderthickening timehydration mechanism
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 6-10,75 )