GM(1,N)灰色模型在压裂井评井选层中的应用

APPLICATION OF GREY MODEL-GM(1,N) IN WELL-EVALUATION AND HOR IZON-SELECTION OF THE FRACTURED WELL

水力压裂是低渗透致密气藏开发的一种十分有效的方法。压裂井的评井选层是实施水力压裂的基本工作 ,常规方法是利用经验进行定性分析 ,给定选层标准。文章尝试利用灰色系统理论进行灰色建模 ,采用灰关联分析和GM (1,N)灰色模型对拟压裂井的拟压裂层段进行定量分析 ,确定该层段压裂后可能具有的开采潜力以及潜在的压裂效益 。

Hydraulic fracturing is a very effective method in low-permeability tight gas reservoir development. The well-evaluation and horizon-selection of fractured wells are the basic works of implementing hydraulic fracturing and the conventional methods are to give qualitatively the standards of the well-evaluation and horizon-selection according to personal experience. In the paper, a grey model is established by applying grey system theory and a quantitative analysis of pseudo-fracturing interval in pseudo-fractured welt is carried out by use of grey association analysis and grey model - GM(1, N), by which the exploitation potential of the interval after having been fractured and the potential fracturing effect may be all determined, thus providing a new idea for the well-evaluation and horizon-selection of fractured wells.