深水钻井作业井下循环温度场预测

发布时间：2018-02-06 07:17

本文关键词： 深水钻井井下循环温度场预测模型对流换热传热隔水管一维地层边界条件二维地层边界条件　出处：《中国海上油气》2017年03期 　论文类型：期刊论文

【摘要】：深水钻井作业时,海水对流换热作用对井内循环温度计算影响显著。考虑海水区域的对流换热,管柱内、环空内流体的轴向、径向热传导,以及管柱壁径向热传导,建立了深水钻井作业井下循环温度场的预测模型,讨论了海水对流换热、有无隔水管和一维、二维地层边界条件的影响。结果表明:海水对流对井下循环温度的影响较大,必须考虑海水区域的对流作用;无隔水管工况下,海域内管柱内流体、筒壁的温度明显低于有隔水管的工况;二维地层边界条件计算速度较慢且计算精度会受影响,无特殊需求推荐采用一维地层边界条件。与现场实测温度对比,本文模型计算值与实测值基本吻合,验证了本文模型的正确性。
[Abstract]:In deep water drilling, the convective heat transfer of seawater has a significant effect on the calculation of circulation temperature in the well, considering the convection heat transfer in seawater area, the axial and radial heat conduction of the fluid in the pipe string and in the annulus. The prediction model of downhole circulation temperature field in deep water drilling operation is established, and the heat transfer of seawater convection, the existence of riser and one dimension are discussed. The results show that seawater convection has a great influence on downhole circulation temperature, so the convection in seawater region must be considered. Under the condition of no riser, the temperature of cylinder wall is obviously lower than that of riser. The calculation speed of two-dimensional formation boundary condition is slow and the calculation accuracy will be affected. The one-dimensional formation boundary condition is recommended without special requirement. Compared with the field measured temperature, the calculated value of this model is basically consistent with the measured value. The correctness of the model is verified.
【作者单位】：中海油田服务股份有限公司;中国科学院工程热物理研究所;
【分类号】：TE52

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