变高压物性天然气井产能预测方法研究——以塔里木盆地迪那L井为例

Methods for Predicting Productivity of Gas Wells with Variable High Pressure and Physical Property——By Taking Well Dina L in Tarim Basin for Example

针对天然气井的实际生产状况,运用渗流力学、油藏数值模拟和数值计算方法等相关理论,对变高压物性天然气井的产能计算方法进行了深入研究,建立了变高压物性天然气井产能计算的数学模型和数值模型,采用数值有限差分法对模型进行求解。采用Microsoft VisualC++6.0在WindowsXP环境下开发出变高压物性天然气井产能预测与评价软件,对塔里木盆地迪那L井进行了应用,计算产量与实际产量对比结果表明,产能预测方法能准确预测气井产量,对于建立天然气井合理生产制度有一定的指导意义。

The related mathematical model and finite element numerical model were used to study the variable high pressure properties of production capacity of gas wells,a mathematical model and numerical model were established for variable high pressure properties of gas wells on the basis of using related theories,such as fluid mechanics,reservoir numerical simulation,numerical computation method.In accordance with an actual productive status of the gas wells,finite element differential numerical simulation was used for solving the model.Under the condition of Windows XP of Microsoft Visual C++6.0,Well Dina L in Tarim Basin is forecasted from the aspects of productive capacity and evaluation on variable high pressure properties of gas wells.The result of calculated production rate comparing with actual production rate shows that the method can be used to accurately predict the production rate in gas wells and it can provide a guidance for building a rational production system of gas wells.