多层气井生产系统分析方法与应用

针对多层气井的生产特点，建立了多层气井生产系统分析模型，给出了迭代求解各层产气量的方法。将多层生产系统分析方法与气藏物质平衡方程相结合，采用分步迭代的方法，可以求解多层气井生产过程中各层的压力动态；用实例说明了用多层气井生产系统分析方法可以分析多层合采时各单层压力随生产时间的变化，某一压力状态下各单层的产气情况，一定要求条件下实施分层采气时气嘴的分压要求等，为多层气井生产优化决策提供科学依据。

Method for Analyzing Multi-layer Gas Production System and Its Application

In allusion to the characteristics of production in multi layer gas wells, an analysis model was established for the production system and the method was derived for iterative solution to the production of each layer. The method of multi layer production system analysis was combined with the equation of material balance, the method of stepped iteration was used solving pressure dynamics of each layer during the production. Application indicates that the method of multi-layer production system analysis can be used to analyze the pressure of each layer changing with production time in commingled production of multi-layers, gas production rate and partial pressure of gas nipple under certain pressure conditions, it provides a scientific basis for optimized decision of multi-layer production of gas wells.