HJH-1型高温油井水泥缓凝剂的合成及其性能评价

Synthesis and Characterization of retarder HJH-1 used in high Temperature oil well cement

摘要:

通过正交实验确定最佳合成条件为：m(MA):m(AMPS):m(AM)=21:9:8、引发剂加量8%、反应温度90 ℃和反应时间6 h，在此条件下合成一种新型高温油井水泥缓凝剂HJH-1，对其应用性能进行评价。实验结果表明，HJH-1型缓凝剂在140℃的高温环境下仍具有很好的缓凝效果，4%加量时稠化时间为300 min，初始稠度低于30 Bc，稠化线形良好，直角稠化时间小于20 min；稠化时间可调性好，温度和加量敏感性低，综合性能满足固井施工安全要求；此外，将低场核磁共振分析技术应用于塑性水泥浆的研究，测试水泥浆体初凝前的横向弛豫时间T2分布，进一步分析了在初始水化阶段水泥浆体中水的存在状态及该缓凝剂对水泥浆初始阶段水化过程的影响。

Abstract:

hrough the orthogonal experiment to determine the optimal synthetic conditions：m(MA):m(AMPS):m(AM)=21:9:8，The amount of initiator is 8%、reaction temperature is 90 ℃ and reaction time is 6h,Under these conditions,synthesis a new type of high temperature oil well cement retarder HJH-1and evaluate its application performance.The experimental results show that the HJH-1 retarder in the high temperature of 140 ℃ environment still has a good retarding effect,when the added amount of retarder is 4% that thickening time is 300min,Initial consistency under 30 Bc, the curved shape of thickening is normal, right angle thickening time is less than 20 min,Adjustability of thickening time is good,and have a low sensitivity of temperature or add quality,which all meet the cementing construction safety requirements;in addition, the low field nuclear magnetic resonance (NMR) analysis technology was applied to the plastic cement slurry to test slurry transverse relaxation time T2 distribution before initial setting,Furthermore it analyzes the state of water in the initial stage of hydration and validate the retarder on the influence of cement hydration process in the initial stage.