达西公式

为研究溶解气驱油藏油井IPR曲线的计算方法，对达西公式进行了分析，并结合现场实际情况，推出了计算油气水三相流动时产能预测的新公式。

O study the method of calculating IPR curves for wells of solubilized gas driving reservoir , this paper analyzed darcy formula and derived a new formula of productivity prediction which can be used in three phase flow of oil , gas and water .

但随着渗透流速的增大，流动逐渐偏离线性规律，进入非达西流区，达西公式就不再适用了。

Darcy formula has a higher accuracy in the Darcy flow . But with the increase of the seepage velocity , flow gradually generally becomes deviate from the linear law , the relative error between formula calculation and experimental values will gradually increase .

当含水原油为牛顿流体时，其压降计算按传统方法采用达西公式计算；

When the fluid is Newtonian fluid Darcy formula is adopted to calculate its pressure drop as a conventional means .

进一步说明不能用传统的达西公式计算气体钻井中低渗透地层液体侵入量。

It further proves that the traditional Darcy formulae cannot be used to calculate the liquid influx during gas drilling of low-permeability formations .

根据达西公式及相对渗透率曲线和毛管压力曲线的表示式，提出了一个描述水锁机理及其影响因素的简化的数学模型。

This paper presents a simplified mathematical model for describing the water block mechanism and its influences , based on Darcy 's formula and relative permeability curve and capillary pressure curve .

站内管路水力计算采用达西公式，摩阻系数采用科尔布鲁克公式，局部阻力压降采用等效长度法。

Darcy 's formula is used for hydraulic calculation of gathering station piping , Colebrook equation used for determination of friction coefficient , and pressure drop from local resistance is determined using equivalent length method .

通过分析比较螺旋个数和螺距分别对压力降的影响，从而修正达西公式，拟合出螺旋结构压力降的简化计算公式，并通过了试验验证。

By analyzing the effect of screw number and helical pitch on pressure drop , Darcy ′ s equation was amended , and simplified calculation formula of pressure drop in spiral structures was fit , which was tested and verified .

把含气量引入达西流产量公式也许能更真实地反映甲烷气体在煤储层中流动产出的特征。

And Darcy flow production equation with gas-bearing volume may reflect the characteristics of methane migration in coal measure strata more really .

从达西二维产量公式出发，结合测井学基本理论，以相对渗透率与含水饱和度的函数关系为纽带，导出每米采油指数与储层电阻率、孔隙度、渗透率之间的多元关系式；

Based on the 2D Darcy production formula , and combined with the fundamental theory of logging , this paper puts forward the multivariate functions of productivity index per-meter vs. reservoir resistivity , porosity and permeability by using the functional relation of relative permeability with water saturation .

地下水在多孔土层中渗流速度的达西（Darcy）公式是用实验方法得到的。该公式适用于均质各向同性土层中的海流计算，但对各向异性土层中的渗流计算，则不能直接采用。

The Darcy formula of the velocity of the infiltration flow of ground water through porous soil is obtained by means of experimental methods .

根据达西定律和阿尔奇公式的物理意义，由毛管电动力学和双水模型理论出发，建立了阿尔奇饱和度指数与储层渗透率、孔隙度、饱和度的相关性理论。

According to the theory of capillary electrokinetics and dual porosity water model , the relationship between Archie saturation index and reservoir characteristics is developed .

文章首先导出底水气藏打开不完善井在达西区域的压降公式，再结合非达西区域的二项式产能公式最终得到底水气藏向打开不完善井流动的二项式产能公式。

A pressure draw-down equation is first established for partial penetration gas well in Darcy-flow dominated domain in bottom water reservoir , and then a binomial deliverability equation is obtained by combining with Non-Darcy binomial radial flow equation .

鉴于此，基于椭圆柱模型提出了描述含启动压力梯度及高速非达西效应的产能公式，并分析了启动压力梯度对低渗透气藏水平井产能的影响。

In view of this , based on the elliptical cylinder model description containing the starting pressure gradient and high-speed non-Darcy effects , productivity formula , and the starting pressure gradient for low permeability gas reservoir level of well productivity .

把聚合物溶液通过拉伸&收缩的孔道时所表现的拉伸粘度，考虑到达西粘度中，重新建立了达西公式中的有效粘度模型。

The extensional viscosity when polymer solution passing the size-varing pores is considered into Darcy viscosity , rebuilding the effective viscosity model in the Darcy Law .