Calculation and analysis of wellbore temperature field in deepwater drilling
Calculation and analysis of wellbore temperature field in deepwater drilling
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发表时间：
2008
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通讯作者：
Cheng Hai-qing
中科院分区：
文献类型：
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作者：
Cheng Hai-qing
通过数据回归分析得到了南海海域深部海水温度分布，并根据热力学理论建立了深水钻井循环和非循环条件下井筒温度场的计算公式。计算结果表明，在循环条件下，保温层不能损坏，应采用较大的输送能力来维持温度；停泵时，随着停泵时间的延长，井筒温度将接近外界温度；为防止井筒水合物的形成和防喷器的关闭，必须缩短停机时间。
The sea water temperature distribution in depth of Nanhai was obtained by data regression analysis.And the calculation formulas of wellbore temperature field during circulation or non-circulation terms in deepwater drilling were established based on the thermodynamics theory.The calculation results indicate that the insulating layer should be undamaged and large delivery capacity should be used for maintaining the temperature under circulation condition.When the pump stops,the wellbore temperature will be closing to the extraneous temperature with shutting time increasing.Shutting time must be short to prevent hydrates forming in wellbore and blowout preventer.