致密砂岩气藏不同储层产能及其相对贡献率初探

针对致密砂岩气藏各类储层产能及其贡献率到底有多少的问题,选取致密砂岩气藏Ⅰ、Ⅱ、Ⅲ类储层样品进行产能模拟实验,对致密砂岩储层的产能贡献率进行分析研究。实验研究表明Ⅰ类、Ⅱ类、Ⅲ类储层平均产能分别为408.4825m3/m·d、139.745m3/m·d、50.105m3/m·d,按照每口井有效厚度25m计算,未压裂改造井日产能可达到1002.1m3/d。Ⅰ类、Ⅱ类、Ⅲ类储层产能贡献率分布区间分别为:55%~65%、23%~27%、8%~15%,目前开发很少的Ⅲ类储层具有一定的产气能力,是致密气藏后续开发的潜力层段,这一结论为国内致密砂岩气藏资源的开发指明了方向。

Productivity Contribution Ratio Experiment Preliminary Study of Different Reservoir Capacity and its Relative Contribution Ratio in Tight Gas Pool

Aiming at various types of reservoir productivity quantity and its contribution rate of the tight sandstone gas reservoir,the experiment chooses different type reservoir in tight gas pool to carry out the capacity contribution simulation experiment to analyze the capacity Ratio of tight sandstone reservoir.Experimental results show that the type I,II,III reservoir average daily capacity respectively reaches 408.4825m3/m·d、139.745m3/m·d、50.105m3/m·d According to the calculation of single well,effective thickness 25 m,without fracturing the production capacity reaches 1002.1m3/d.Type I,II,III reservoir productivity contribution distribution respectively is 55%~65%、23%~27%、8%~15%.The current type III reservoir developed rarely has certain gas production capacity and will be potential follow-up resources of tight gas.The conclusion will direct the effective development of tight sanstone gas.