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泥浆滤液侵入扎隙性和渗透性地层时，其侵入过程是一个与时间有关的动态过程。文章利用多相渗流理论计算了侵入条件下地层流体参数和电性参数的分布特性，建立了求解双侧向测井仪器响应的有限元计算模型。结果表明，在侵入条件下，仪器的视电阻率与地层参数、流体性质和测井时间有关。其中，测井时间对仪器响应的影响表现在随着泥浆不断侵入地层，探测向和浅侧向测井响应呈现不同的变化规律，二者之差随时间呈正、负交替的变化。利用这一变化有助于建立侵入校正模型以求准地层真电阻率，正确评价储集层段流体的移动情况。
When the mud filtrate penetrates into the gully and permeable formations, its invasion process is a time-dependent dynamic process. In this paper, the distribution characteristics of fluid parameters and electrical parameters of formation under intrusion conditions are calculated by using multiphase seepage theory. The finite element calculation model for solving the response of double lateral logging tools is established. The results show that under intrusion conditions, the apparent resistivity of the instrument is related to formation parameters, fluid properties and logging time. Among them, the effect of logging time on the response of the instrument shows that the logging response varies from positive to negative with time as the mud continuously intrudes into the formation. Making use of this change helps to establish an intrusion correction model to find the true resistivity of the formation and correctly evaluate the fluid movement in the reservoir.