优化气井配产的多因素耦合分析方法及其应用

分析预测气井的稳产能力是优化气井配产的关键之一，传统上主要依靠气藏数值模拟来实现，需要充分的静、动态资料支撑。针对复杂气藏开发早期开展上述工作的难点，研究提出了基于测试资料和早期生产数据的分析方法，即通过流入流出曲线图版确定气井产量调节的可行区域，在此基础上进一步计算井控储量，建立和求解流入、流出及物质平衡联立方程，绘制产量与无阻流量比值、井底流压与地层压力比值以及井口油压随生产时间变化的关系曲线图版。这样不但掌握了井口输气压力约束条件下不同配产的稳产时间，而且掌握了产量与无阻流量比值等经验性参考指标随生产时间的变化情况，认识了不同时期气井维持稳产的潜力，为优化气井配产提供了实用的定量化分析手段。

Multi factor coupling analysis of optimized gas well production allocation

Analysis and prediction of rate maintenance capability of gas wells is one of the keys to the optimization of gas well production allocation, which has been traditionally achieved on the basis of reservoir numerical simulation relying on sufficient static/dynamic materials. In view of such difficulty especially in the early development of complex gas reservoirs, an analytical method is proposed based on the test resources and early production data. With this method, the feasible areas for the adjustable gas well productivity can be determined according to the IPR/DPR curves, based on which the single well controlled reserves are calculated. IPR/DPR and material balance equations are constructed and solved, and the ratio between production rate and AOF and that between bottomhole flowing pressure and formation pressure are drawn as well as the changing trend of tubing head pressure along with the production time. In this way, not only can the time of stable production for different production allocation under the condition of output pressure at the wellhead be known well, but the changing trend of empirical guideline along with time, such as the ratio between production rate and AOF, can be obtained, thus the potential of holding a steady production rate can be recognized at different stages. To summarize, this study provides a method for the quantitative analysis of the optimization of gas well production allocation.