普光气田气井水侵特征识别及出水模式探讨

Water Invasion Identification and Water Production Mode in Gas Well in Puguang Gas Field

针对预判普光气田气井是否发生水侵的问题,分析了水、气井出水前后的液气比、压力、流体性质等变化规律,得出半定量到定量的水侵识别指标。普光气田目前有5口出水井,普光C等6口井具有明显的早期水侵特征,为减缓边水推进速度,对低部位气井采取限产控水、降低生产压差等措施,现场应用效果显著。通过动静态数据分析认为,普光A1与普光B1井属于裂缝-孔隙型储层水侵模式,其余3口出水井属于孔隙型储层水侵模式。

In order to identify if there is water invasion in gas well in Puguang Gas Field,the changing rules of liquid / gas ratio,pressure and fluid property before and after water production in gas well have been analyzed and the semi-quantitative and quantitative identification indexes of water invasion have been developed. Research indicates that currently there are five wells producing water in Puguang Gas Field. There are obvious signs of early water invasion in 6 wells such as Well Puguang C. In order to slow down the advancement speed of edge water,production is limited,water is controlled and production pressure difference is lowered for gas wells located at the structural low. The effect of field application is obvious; the dynamic and static data analysis indicates that Well Puguang A1 and Well Puguang A2 are applicable to water invasion mode in fracture-pore reservoir and the other 3 wells producing water are applicable to water invasion mode of pore reservoir.