大庆东部高含蜡、含胶质石油在低渗介质内的流动特征

Characteristics of the Flow of Crude Oil with High Paraffin and Colloidalmatter Content in Lowpermeability Porous Media In Eastern Daqing

研究了低渗透油藏注水开发过程中流度随压力梯度的变化关系．分析了低渗透油藏内的胶凝结构，高分子石蜡、胶质和沥青质的特点及其对石油结构力学性质的影响．结果表明：注水开发非均质低渗透油藏时，油藏系统与外界进行着物质、能量和信息的交换．油藏内胶凝结构的形成、破坏和移动等均使得介质的稳固性和流体的均衡性起变化，在一定条件下，油藏内流度随时空在变化。

This paper illustrates the relationship between mobility and pressure gradient in the course of water flooding of a lowpermeability reservoir. The jelling structure in a lowpermeability reservoir, the characteristics of petroleum gel and petroleum paraffin and their influence on the mechanical properties of petroleum are analyzed. The result shows that when a lowpermeability reservoir is developed through water flooding, there is an exchange of material, energy and information between the reservoir system and the outside; the formation, damage and transfer of the jelling structure in a reservoir cause the stability of porous media and the equilibrium of fluids to change. Under certain conditions, mobility varies temporarily and spatially, and so the flow field changes suddenly.