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Thermal behaviour of geothermal wells using mud and air-water mixtures as drilling fluids

机译：使用泥浆和空气-水混合物作为钻井液的地热井的热行为

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摘要

This paper describes a comparative study of the thermal behaviour of drilling fluids and the surrounding rock when air-water mixtures and conventional muds are used as drilling fluids in geothermal wells. The computations were performed with two numerical simulators: TEMLOPI/V.2, which is used to compute the transient temperature disturbance when mud is employed, and GEOMIST, which is used when air-water mixtures are employed as drilling fluid. Data from a well from the Las Tres Virgenes Mexican geothermal field are used in this analysis. The results of simulation include temperatures computed during circulation and shut-in, and the latter results are compared with temperatures logged during drilling stoppages. It was found that the thermal disturbance caused by circulation of an air-water mixture has a smaller thermal effect than the thermal disturbance caused by drilling muds.
机译：本文描述了当将空气-水混合物和常规泥浆用作地热井中的钻井液时，钻井液和围岩的热行为的比较研究。使用两个数值模拟器进行计算：TEMLOPI / V.2用于在使用泥浆时计算瞬态温度扰动，GEOMIST用于在将空气-水混合物用作钻井液时使用。此分析使用了来自Las Tres Virgenes墨西哥地热田的一口井的数据。模拟结果包括在循环和关井期间计算出的温度，并将后者的结果与钻井停产期间记录的温度进行比较。已经发现，由空气-水混合物的循环引起的热干扰具有比由钻探泥浆引起的热干扰小的热效应。

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