摘要
针对在进行凝析气井生产动态分析以及优化设计过程中深水凝析气井井筒压力、温度分布预测、采气工艺等重要问题。考虑应用SRK状态方程与相平衡闪蒸计算模型结合的方法并对此方法进行充分研究。想要构建以相态变化的深水凝析气井的井筒压力和温度耦合的计算模型为基础的计算模型。然而深水凝析气井还存在井身温度分布不规律,气井在海水中暴露的长度较大,井身的传热与地层部位有不同的规律。凝析气还存在井筒里面发生的相态变化比较复杂,这些问题导致单单是设计计算模型是不远远够的。最终还要利用四阶龙格库塔法对计算模型进行解答才能预得到较为完整的数学模型。这样便可以利用建好的数学模型并且通过提供实际的数学参数计算得出水凝析气井井筒内压力以及温度分布。该模型能够预测出水中气井的生产动态分布等问题,能为今后的深水采气工作提供完整数学理论基础。
In order to solve the important problems in the condensate gas well production dynamic analysis and the optimization design process, the wellbore pressure and temperature distribution prediction and gas production technology in deep condensate gas wells were analyzed. The method of combining SRK state equation with phase equilibrium calculation model was used, and the method was analyzed and researched. A computational model based on the computational model of wellbore pressure and temperature coupling in a deep water condensate gas reservoir with phase change need be established. However, there are still some problems in the deep condensate gas wells, such as irregular temperature distribution, big exposed length of the gas well in the sea, and different heat transfer of the well from that of the formation. The phase change of condensate gas in wellbore is complicated, which leads to the fact that the design calculation model is not enough. Finally by using four-order Runge-Kutta method to solve the calculating model, a more complete mathematical model can be obtained. Thus, it is possible to calculate the wellbore pressure and temperature distribution of the condensate gas well by established mathematical model and providing the actual mathematical parameters. The model can be used to predict the production dynamic distribution of gas wells in water, which can provide a complete theoretical basis for the deep water gas production in the future.
出处
《辽宁化工》
CAS
2017年第9期905-907,911,共4页
Liaoning Chemical Industry
关键词
深水凝析气井
温度分布
压力分布
总传热系数
deep water condensate well
temperature distribution
pressure distribution
overall heat transfer coefficient
