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有效动用并经济开发低渗透油田储量,对石油工业的持续稳定发展具有十分重要的意义。特低渗透油层孔喉细小,流体呈微纳流流动,边界层效应凸显。因此,有必要研究边界层的形成机制和作用方式,并以此为理论基础,改变油层润湿性,提出提高流体渗透率的微流调控方法。综述了特低渗透油层边界层厚度对孔喉有效半径的影响,各种矿物/流体作用模型,双电层模型及其对流体渗流能力的影响,分析了当前微流调控的物理—化学方法。指出今后研究的重点方向为:①边界层层内分子相互作用方式;②相邻不同矿物微粒表面上边界层的相互作用及对流体渗流的控制机制;③逐步完善各种微流调控方法,并注重各种调控方法的协同应用。
Effective use and economic development of low permeability oil reserves, the sustained and stable development of the petroleum industry is of great significance. The ultrahigh-permeability reservoirs have small pore throats, micro-nano-fluid flow and prominent boundary layer effects. Therefore, it is necessary to study the formation mechanism and mode of action of the boundary layer. Based on this, the reservoir wettability should be changed and a microfluidic regulation method should be put forward to improve the fluid permeability. The influence of boundary layer thickness of ultra-low permeability oil layer on the effective pore radius, various mineral / fluid interaction model, electric double layer model and its effect on fluid seepage capacity are reviewed. The physico-chemical method of current microfluidic control is analyzed. It is pointed out that the key research directions in the future are as follows: (1) the mode of molecular interaction in the boundary layer; (2) the interaction of the upper boundary layer on the surface of adjacent mineral particles and the control mechanism of fluid percolation; (3) the gradual improvement of various microfluidic control methods Pay attention to the coordinated application of various control methods.