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要高效地开发低渗透油藏,就需要充分认识低渗透油层自身所具有的特殊规律和性质,并准确地描述低渗透油藏的渗流力学规律.本文以低渗透油藏中可能存在的裂缝网络为研究背景,采用理想的分叉网络模型,研究非牛顿流体中的Binghan流体流过裂缝分叉网络时的启动压力梯度.研究表明低渗透分叉网络油藏中Binghan流体流动的启动压力梯度是流体的屈服应力和分叉网络微观结构参数的函数.本文建立的模型没有经验常数,每个参数都有明确的物理意义.本文的模型有助于进一步深入探讨裂缝网络型多孔介质的渗流机理.
To develop low-permeability reservoirs efficiently, it is necessary to fully understand the special laws and properties of low-permeability reservoirs and accurately describe the seepage mechanics laws of low-permeability reservoirs.In this paper, the possible fracture networks in low permeability reservoirs For the research background, the ideal bifurcation network model is used to study the starting pressure gradient of Binghan fluid in non-Newtonian fluid flowing through the crack bifurcation network.The research shows that the starting pressure gradient of Binghan fluid flow in the low-permeability bifurcated network reservoir is Fluid yield stress and bifurcation network microstructure parameters.The model established in this paper has no empirical constants and each parameter has a clear physical meaning.The model of this paper is helpful to further explore the percolation mechanism of fractured network porous media.