异常高温气井凝析水产出机理及动态研究

基于油气水多相相平衡理论,模拟了异常高温气藏地层原始条件和生产过程中地层和井筒的烃水相态变化特征,分析了气井凝析水的采出过程和机理.计算了不同温度压力条件下凝析气中饱和凝析水含量,得出了气井凝析水产出动态规律曲线.最后对两口实例凝析气井早期产水规律和产水来源进行了分析.结果表明,凝析水产出机理是烃水在不同温度压力条件下的多相平衡,凝析水产水规律可用于气井产水来源和气井产水动态的初步判定和分析.这对于正确认识高温气井产水规律,编制合理的气田开发方案具有重要现实意义.

Study on the mechanism and performance of the condensate water producing from abnormal high-temperature gas wells

Based on the phase equilibrium theory of oil-gas-water multi-phase,the phase varying characteristics of the hydrocarbon and water in formation and well-bore under the original gas reservoir condition with abnormal high-temperature and in production process are studied by simulation,and the process and mechanism of the condensate water producing from the gas wells are analyzed.The contents of the saturated condensate water in condensate gas under different temperatures and pressures are calculated,the production performance of the condensate water is obtained.The law and the source of the early condensate water producing of two practical gas wells are analyzed.It is shown that the mechanism of the condensate water producing is the multi-phase equilibrium of hydrocarbon and water under different temperatures and pressures,the production law of the condensate water can be used for the preliminary judgment of the water source in gas wells and the analysis of the water producing performance of gas wells.The correct recognition of the water producing law of high-temperature gas wells is important to the reasonable design of gasfield development plan.