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首页> 外文会议>Geothermal Resources Council Annual Meeting >A Comparative Analysis of Heating Indices of Wells in Los Humeros, Puebla, Mexico
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A Comparative Analysis of Heating Indices of Wells in Los Humeros, Puebla, Mexico

机译：墨西哥普埃布拉河井井供暖索引的比较分析

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Drilling fluid circulation in a well alters the initial conditions of the reservoir. One such change is the thermal disturbance, whose magnitude is a function of formation characteristics. In this work we apply an analysis method, which uses temperature logs. The temperature is measured at fixed time periods after the drilling operations were stopped. This method uses the cooling caused by the fluid circulation during drilling to determine heating indices. We consider the drilling fluid as causing the thermal disturbance, and analyzed the changes in the rock formation to identify qualitatively the location of strata with or without permeability in a reservoir of volcanic origin. It is important to emphasize in the analysis correlation of parameters such as circulation losses, lithology, drilling speed, etc. The heating indices are calculated from temperature data, measured along the well profile. With the heating indices it is feasible to determine thermal gradient as a time function. The thermal gradient is useful for determining the strata where the cold fluid penetrates into the reservoir formation and the later heat flow from the reservoir to wellbore. The heating indices are obtained from a pair of temperature logs taken at different shut-in times. The Los Humeros, Puebla, Mexico, geothermal field is considered to illustrate the application of the methodology. The wells selected are located in the central zone of the field. Applying the analysis method in this fractured reservoir was feasible to identify the influence of structures over the wells' behavior.
机译：钻井液中的钻井液改变了储层的初始条件。一种这样的改变是热扰动，其幅度是形成特性的函数。在这项工作中，我们应用了一个分析方法，它使用温度日志。在停止钻井操作之后在固定时间段测量温度。该方法使用钻井过程中的流体循环引起的冷却来确定加热索引。我们认为钻孔液导致热干扰，并分析了岩层的变化，以定性地识别与火山原产储层中的地层的位置或没有渗透性。重要的是要强调参数的分析相关性，例如循环损耗，岩性，钻探速度等。从沿着井轮廓测量的温度数据计算加热指数。通过加热指标，可以确定热梯度作为时间功能是可行的。热梯度可用于确定冷流体渗入储存器形成的层和从储存器到井筒的后续热流动。加热索引是从不同的关闭时间拍摄的一对温度日志获得。 Los Humeros，Puebla，墨西哥，地热场被认为是说明方法的应用。选择的孔位于该领域的中心区域。在这种裂缝储层中应用分析方法是可行的，可以识别结构对井的行为的影响。

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