海上油井井口热力耦合问题计算

The Coupled Thermodynamic Frozen Heave of Liquid Medium at the Mouth of Oil Well

建立冬季结冰期封井系统耦合热力过程的物理模型;通过采用广义中点积分法则,给出时间离散化的耦合系统热传导方程;提出适应于该热力偶合热传导问题的变分原理和有限元计算列式;讨论了与冰晶体压力相关的相变温度变化对空间离散系统数值积分和应力计算的影响.采用该耦合热力模型对辽河油田封井井口的耦合冻胀问题进行计算.

A coupled thermodynamic model of frozen heave at the mouth of oil well under severe winter climate is put forward. By use of the principle of generalized midpoint and variational methods, the finite element formulas of the model of coupled thermodynamic frozen heave under spatial and temporal discrete are deduced. The paper also deals with the influence of pressure variety of ice crystal on temporal integral step-length and calculation of stress-field. A practical example of frozen heave at the mouth of oil well in the Liaohe oil-field is examined .