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井下循环温度是影响注水泥能否成功的关键因素之一 ,要准确计算循环温度 ,除了建立与井下实际情况吻合的模型外 ,还必须准确给出水泥浆、泥浆的热物性数据。首先根据测量液体比热的电流量热器法原理自制了测量装置 ,然后分别测量了 15种水泥浆、5个密度的两类泥浆在 7个温度范围下的比热 ,最后分别分析了水泥浆与泥浆的组份、密度以及温度的变化对水泥浆和泥浆比热的影响。结果表明 :在相同密度温度条件下 ,水泥浆、泥浆组份不同时 ,其比热不同 ;同组份的水泥浆和泥浆 ,在任何温度下 ,水泥浆、泥浆比热随密度减小而增大 ;对任何水泥浆、泥浆 ,其比热随温度升高而增大 ;一般在相同密度和温度条件下 ,泥浆比热比水泥浆的比热大
Downhole temperature is one of the key factors that affect the success of cement injection. To accurately calculate the circulating temperature, in addition to establishing a model consistent with the actual conditions in the well, the thermophysical properties of cement slurry and mud must be accurately given. First of all, a measuring device was made according to the current calorimeter method for measuring the specific heat of the liquid. Then, the specific heats of 15 kinds of grouts and 5 kinds of density muds in seven temperature ranges were respectively measured. Finally, Influence of slurry composition, density and temperature on the specific heat of cement and mud. The results show that under the same density and temperature conditions, the specific heat is different when the grout and mud components are different. The grout and mud of the same component, at any temperature, the specific heat of grout and mud increases with the decrease of density Large; for any cement slurry, the specific heat increases with temperature; generally in the same density and temperature conditions, the specific heat of the slurry than the heat of cement slurry is large