A scaling-down experiment system of array laterolog resistivity was developed, and a corresponding formation model was built by 3D finite element numerical method to study the effect of different factors on the logging response quantitatively. The error between the experimental and numerical results was less than 5%, validating the reliability of the numerical simulation method. The single factor analysis of the formation relative dip, resistivity anisotropy and drilling fluid invasion was carried out by numerical simulation method, and the results show that: (1) The increase of relative dip can lead to the increase of formation resistivity, but the increasing value is relatively small, and the values of five array resistivity curves will reverse when the relative dip angle reaches a certain degree. (2) The increase of anisotropy coefficient λ can also cause the formation resistivity to rise, and the resistivity will increase by about 10% when λ increases from 1.0 to 1.5 in vertical wells. (3) Drilling fluid invasion has a more significant effect on the logging response than the former two factors. The order of the five curves will change due to drilling fluid invasion in anisotropic formation and the change rule is contrary to resistivity anisotropy. Taking the logging data of the Yingxi oilfield in the Qaidam Basin as an example, an anisotropic formation model considering drilling fluid invasion was built, and the numerical simulation results from the above methods were basically consistent with the logging data, which verified the accuracy of the method again. The results of this study lay a theoretical foundation for multiple-parameter inversion in anisotropic formation under complex well conditions.

开发了阵列测井电阻率的按比例缩小实验系统，并通过3D有限元数值方法建立了相应的地层模型，定量研究了不同因素对测井响应的影响。实验与数值结果之间的误差小于5％，验证了数值模拟方法的可靠性。通过数值模拟方法对地层相对倾角，电阻率各向异性和钻井液侵入进行了单因素分析，结果表明：（1）相对倾角的增加可导致地层电阻率的增加，但增加相对较小的角度，当相对倾角达到一定程度时，五个阵列电阻率曲线的值将反转。（2）各向异性系数λ的增加也会引起地层电阻率的上升，当垂直井中的λ从1.0增加到1.5时，电阻率将增加约10％。（3）钻井液入侵对测井响应的影响比前两个因素更为显着。这五个曲线的顺序将因各向异性地层中钻井液的侵入而发生变化，其变化规律与电阻率各向异性相反。以柴达木盆地英西油田的测井数据为例，建立了考虑钻井液入侵的各向异性地层模型，上述方法的数值模拟结果与测井数据基本吻合，验证了该方法的准确性。再次方法。