致密气藏产水气井相渗曲线及生产特征研究

Relative Permeability Curve and Production Characteristics for Water Producing Gas Well in Tight Gas Reservoir

针对致密气藏开发中的气井产水问题进行相渗曲线及生产特征研究。基于苏里格气田实验及生产数据,结合气井测试及数值模拟技术,分析致密气藏相渗曲线特征,反演储层相关参数,观察产水气井生产动态特征及各因素的影响。研究表明,致密储层的气-水相渗曲线形态与覆压渗透率具有较好的相关性,而产水气井的生产动态特征则受到相渗曲线、含水饱和度、储层渗透率等多因素的综合影响。

In order to solve the problem of gas well water production in tight gas reservoir development,this paper studied the phase permeability curve and its production characteristics. Therefore,based on the experiment and production data of Sulige tight gas field,combining test analysis and numerical simulation method,this paper aims to analyze the relative permeability curve and production characteristics. Through inversion of reservoir parameters,it also checked the dynamic characteristics and the influence of various factors on the production of water gas well.It is revealed that good relationship could be found between relative permeability curve and absolute permeability,and the production characteristics are comprehensively influenced by many factors,such as relative permeability curve,water saturation and reservoir permeability and so on.