气井生产特征与产水机理分析

Gas well production characteristics and water production mechanism analysis

通过对气井产水特征的研究,将气藏产水分为两个产水阶段、三种产出方式。气藏储层孔隙含水饱和度较高,储层部分区域存在夹层水,当地层压力下降到一定程度,这部分孔隙水或夹层水在压差诱导作用下而产生流动。由于储层裂缝发育,地层水沿裂缝方向窜懂或沿与裂缝发育方向形成大夹角,在类似微细网状裂缝中形成局部舌进水侵。通过研究,深入认识了气藏的水侵机理,对今后生产管理和气藏开发调整具有一定的现实意义。

Through the study of the characteristics of water production in gas wells,the water of the reservoir is produced in two stages of water production and three kinds of output.Type. The reservoir pore water saturation is high,and there is a layer of water in the reservoir area,and the local layer pressure drops to a certain extent,this part of the pore water or the interlayer water flow under the pressure difference. Because of the reservoir fracture development,the formation water channeling along the crack direction,or along with the development direction of the fracture zone to form a large angle,in similar to the micro mesh cracks in the formation of local tongue intrusion. Through the research,this research has realized the water invasion mechanism of gas reservoir,the research results have certain practical significance to the future production management and gas reservoir development adjustment.