油井水泥多功能高温缓凝剂的研究

为满足深井固井对油井水泥缓凝剂抗高温性能的需要，研制了多功能高温缓凝剂（MP），并对MP的高温缓凝性能、降滤失性能进行了室内评价。结果表明：MP具有优良的抗温缓凝效果，稠化时间可调；稠化时间的重现性好；还能有效地降低水泥浆的失水量。此外，使用量热仪研究了MP对水泥浆水化反应速度的影响，发现MP使水泥浆的初始水化放热速率减小，水化诱导期延长，随着高温缓凝剂MP掺量的增加，水泥水化最高放热峰出现的时间按比例延长，缓凝性能线性关系良好。

TESTING OF COMPOUND HIGH TEMPERATURE BUFFER FOR OIL WELL CEMENT

In order to meet what the deep well need,this paper developed the compounded high-temperature-resisted retarder for oilwell cement,and the properties of high-temperature-resisted retardant,low fluid loss were tested in laboratory.The results indicated that: MP can effecitively resist high temperature;retard the cementing;adjust the thicken time;reduce fluid loss of grout,and the thicken time can recur regularly.Moreover there charactered how MP effected the speed of cement hydration with Isothermal calorime...