砂砾岩油藏渗透系数研究

为了掌握砂砾岩油藏渗流规律,基于砂砾岩中砾和砂含量及其排列方式不同,开展了理论和实验研究。把砂砾岩孔隙度和渗透率设为砾、砂含量的函数,再基于Kozeny-Carman方程建立渗透率与孔隙度和颗粒粒径的函数关系。研究表明,砂砾岩组成及颗粒排列方式是控制砂砾岩渗透系数的主要因素,砂砾岩渗透率与孔隙度为一种线性关系。水驱油实验进一步表明,束缚水饱和度依赖于砂、砾含量,含水上升快,揭示了砂砾岩油藏特有的渗流特点。

On the Permeability Coefficient of Glutenite Reservoir

In order to understand the seepage rule of glutenite reservoir,theoretical and experimental investigation was carried out based on the content proportion of sand and pebble-size grain and packing state in rock.Setting the porosity and permeability of sandy conglomerate as a function of sand and pebble-size grain content,then a function related the porosity and permeability with grain size was established based on Kozeny-Carman equation.Results show that the relative proportions of sand and pebble-size grain...