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为了很好的了解页岩气藏的生产动态特征,应对页岩气藏渗流机理进行研究。页岩气藏属于非常规气藏,它最主要的特点就是有吸附解吸现象。在研究水平井的渗流特征时一般使用点源函数的方法,页岩气水平井主要是在点源函数中考虑到一些页岩气所具有的特性,如吸附解吸现象。由于页岩气藏一般都采用水力压裂方法来进行开采,且页岩层较易破碎形成裂缝,近年提出了一种三线性流模型来描述页岩气垂直裂缝水平井的流动规律。随着对页岩储层结构的进一步了解和研究,我们可以对三线性流模型做进一步的深化研究。
In order to get a good understanding of the dynamic characteristics of shale gas production, the seepage mechanism of shale gas reservoirs should be studied. Shale gas reservoirs belong to unconventional gas reservoirs, and its most important feature is the phenomenon of adsorption and desorption. In the study of horizontal well’s seepage characteristics, point source function is generally used. Shale gas horizontal wells mainly take into account some characteristics of shale gas in the point source function, such as adsorption and desorption phenomenon. Because shale gas reservoirs are generally exploited by hydraulic fracturing methods and shale layers are more likely to be fractured, a three-linear flow model was proposed in recent years to describe the flow patterns of vertical fractured horizontal shale wells. With the further understanding of shale reservoir structure and research, we can further study the tri-linear flow model.