油气藏储集层双渗流动系统不稳定试井曲线特征研究

从不稳定试井资料单对数与双对数导数曲线形态特征入手 ,可以综合确定油藏储集层的双渗流动系统。对这一不稳定试井曲线形态所刻划的油藏储集层物理模型仍然可用root模型的扩展模型来解释 ,不同的是基质既向裂缝供液 ,其本身也有一定的流动能力。与双层双渗流动系统相同 ,都是先高渗系统流动 ,后低渗系统流动 ,但只有双层高低渗透层之间有流动时才有共同的流动特点。对于这一现象 ,可以用流动阻力模拟电路来描述。

Study for Transient Testing Curves' Characteristic with Dual Percolation System in Reservoir of Oil and Gas Field

From the shape of semi-logarithm and dual-logarithm derivative curves of transient testing data,it is comprehensively determined dual percolation system of reservoir.But to the physics model plotted by this curves' shape,it is also interpreted by expanded model of ROOT model.The difference is that the matrix not only supplies fluid to crack,but also has much flow ability of itself.Like dual percolation system with dual layers,both of them are the high percolation system first and low one latter,but the same flow characteristic is happened only on occasion of appearing flow between high and low permeable formation.To phenomena,flowing restriction analog electronic circuit can describe it.