【摘要】 正确认识低渗透油藏的非线性达西渗流规律,有助于更为合理、有效地开发低渗透油藏。通过对低渗透油藏主要粘土矿物与水相互作用的实验分析及填砂管渗流实验对比,揭示了非线性达西渗流的起因,为深入研究低渗透油藏渗流规律奠定了一定的实验基础。实验结果表明,粘土矿物的膨胀与分散不仅使渗流的有效孔隙体积减小,而且可形成高粘溶胶,这是引起油藏非线性渗流的主要原因之一。更多还原

【Abstract】 Correct understanding on the non-linear Darcy percolation mechanism in the reservoirs helps to develop low-permeability reservoirs more reasonably and more efficiently. Through the experiment analysis of interaction of the main clay mineral with water and experiment comparison of percolation in sand - packed tube, the cause of non-linear Darcy percolation in low-permeability oil reservoir was revealed. The works laid certain experimental foundation for deep investigating of the percolation regularity in the low permeability reservoirs. The experimental results show that dilation and dispersion of the clay mineral not only decreased the efficient pores volume for percolation but also formed collosol with high viscosity, which is one of the main causes of non- linear percolation.更多还原