基于裂隙岩体渗透张量的水封油库水幕布置方式研究

为研究岩体渗透张量对于水封油库水幕布置方式及渗流场的影响规律,推导了等效渗透张量计算公式,模拟分析不同渗透张量与水幕布置方式组合下的渗流场。通过二维裂隙介质网络模型求得不同方向渗透系数,并拟合成渗透椭圆,求得等效渗透张量。开展了不同等效渗透张量和不同水幕布置方式的数值模拟,进行了渗流场及洞周速度分析,并采用黄岛油库进行了分析验证。研究结果表明:裂隙介质可通过各方向渗透系数的计算求出等效渗透张量,通过分析不同渗透张量与水幕布置方式组合,得出应采用水幕孔垂直于渗透主方向的布置方式。

Study on Water Curtain Arrangement of Water Sealed Oil Storage Based on Permeability Tensor of Fractured Rock Mass

A new formula of the equivalent permeability tensor were developed to study the influence of permeability tensor of rock mass on the layout of water curtain and seepage field in water sealed oil storage. The coefficient of permeability in different directions was obtained by a two-dimensional medium network model. The equivalent permeability tensor was obtained. The numerical simulation of different equivalent permeability tensor and different water curtain arrangement was carried out. The seepage field and the analysis of the velocity of the hole were carried out. The Huangdao oil storage proved its reasonableness. The results showed that the equivalent permeability tensor in fracture medium can be calculated by the calculation of the permeability coefficient in all directions. It is concluded that the layout mode of the water curtain hole should be perpendicular to the main direction of penetration by the analysis of the combination of different permeability tensors and water curtain arrangement.