摘要
产水气井在开、关井过程中，井筒内气水两相的流动为瞬变流动，井筒压力、温度等参数是井深和时间的函数。根据气液瞬变流动过程中所遵循的质量、动量和能量守恒定律，建立了描述气液两相瞬变流动的数学模型。该模型是一组偏微分方程，采用有限差分法对其进行求解，给出了计算井筒压力、温度和气液相速度的差分方程和详细的计算步骤。最后用具体实例模拟了产水气井开井过程中压力、温度随时间变化的情况，分析了压力、温度随时间变化的规律，证明了流动达到稳定后，瞬变模型的计算结果和稳定模型的计算结果是一致的，从而证明了模型是有效的。
The two phase flow of gas and water in well bore is transient flow when gas wells producing water are opened and shut off ． Well bore pressure and temperature are functions of well depth and time． A mathematical model that describes the transient flow is developed based on the conservation law of mass momentum and energy followed in the course of transient flow process of gas liquid phases． This model is a set of partial differential equations and by using finite difference method the differential equations of pressure and temperature and detailed procedures of calculation are presented． Case history is applied to simulate the pressure temperature variations with time during production of gas wells and to analyze the law of the pressure temperature variations with time which proves that the calculation result of transient flow model is in conformity with the result of stable models and further proves the validity of the model．
出处
《新疆石油地质》
CAS
CSCD
2000年第6期502-504,共3页
Xinjiang Petroleum Geology
关键词
气井
两相流动
流动压力
数学模型
瞬变流动
<Keywords>Gas well Two phase flow Borehole Flowing pressure Temperature Mathematical model
