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Archie公式中的参数通常是根据岩样的岩电实验确定的。现在我们将探讨一种新方法,即用饱和度分析数据确定公式中的各参数。由两个Archie公式得知的饱和度、电阻率、孔隙度之间存在相关性,将这种相关性计算岩石的岩电参数转变成求解公式中多个未知系数的问题。依据对Junggar盆地多口井的实际饱和度分析数据的计算及研究表明,其结果均在理论范围之内,也可以利用这些结果结合测井资料求取含水饱和度。我们还将探讨一下影响Archie参数的各种因素,特别是岩石物理特性及润湿性对其的影响。通过岩样岩电实验确定的Archie参数难于证明阿尔奇参数有一较大的变化范围,而利用饱和度分析法却能证明。更重要的是用饱和度分析数据确定Archie参数,无需计算地层水电阻率。饱和度应由现场取心岩样测得,由于流体释放及挥发,测量出的饱和度与实际值之间存在较大误差,影响了饱和度数据的有效性,因此,关键问题是校正饱和度。
The parameters in the Archie formula are usually based on the rock sample rock experiment. Now we will explore a new method of using saturation analysis data to determine the parameters in a formula. The correlation between saturation, resistivity and porosity, which are known from the two Archie formulas, turns the rock electrical parameter of this correlation calculation rock into the problem of solving many unknowns in the formula. Based on the calculation and analysis of actual saturation analysis data of multiple wells in the Junggar Basin, the results are within the theoretical range, and these results can also be used in combination with well logging data to obtain water saturation. We will also explore various factors that affect Archie’s parameters, particularly the petrophysical properties and wetting properties. It is difficult to prove that the Archie parameter determined by rock-rock electrical experiments has a large variation range, but it can be proved by the saturation analysis method. More importantly, Archie parameters are determined using saturation analysis data without the need to calculate formation water resistivity. The saturation should be measured by on-site core samples. Due to the release and volatilization of fluids, there is a big error between the measured saturation and the actual value, which affects the validity of the saturation data. Therefore, the key problem is to correct the saturation .