The formation factor, which reflects the electrical conductivity of porous sediments and rocks, is widely used in a range of research fields. Consequently, given the discovery of numerous porous reservoir rocks and sediments exhibiting complex conductivity characteristics, methods to quantitatively predict the formation factor have been actively pursued by many scholars. Nevertheless, the agreement between the theoretically calculated and measured formation factors remains unsatisfactory, partially because the distribution characteristics of the entire pore space affect the final formation factor. In this study, a new method for characterizing the formation factor is proposed that considers the impacts of different complex pore structures on the conductivity of pores at different positions in the pore space. With this method, the electrical transmission through a rock can be accurately and quantitatively estimated based on the conductivity and shape of pores, the tortuous conductivity, and the classification of the pore space into conductive, weakly conductive, and nonconductive pores. By evaluating 24 datasets encompassing 7 types of rocks and sediments, including marine hydrate-bearing sediments and shale, the proposed model achieves remarkable agreement with the experimental data. These excellent confirmation results are attributed to the ubiquitous presence of weakly conductive and nonconductive pores in almost all rocks and sediments. Through further research based on this paper, an increasing number of adaptation models and a comprehensive set of evaluation methods can be developed.

反映多孔沉积物和岩石电导率的地层因子被广泛应用于一系列研究领域。因此，由于发现了大量具有复杂电导率特征的多孔储层岩石和沉积物，许多学者积极探索定量预测地层因素的方法。尽管如此，理论计算和测量的地层因子之间的一致性仍然不能令人满意，部分原因是整个孔隙空间的分布特征影响了最终的地层因子。本研究提出了一种表征地层因素的新方法，该方法考虑了不同复杂孔隙结构对孔隙空间不同位置孔隙电导率的影响。用这种方法，根据孔隙的电导率和形状、曲折的电导率以及孔隙空间分为导电孔隙、弱导电孔隙和非导电孔隙的分类，可以准确定量地估算通过岩石的电传输。通过评估 24 个数据集，包括 7 种类型的岩石和沉积物，包括海洋含水合物沉积物和页岩，所提出的模型与实验数据取得了显着的一致性。这些出色的确认结果归因于几乎所有岩石和沉积物中普遍存在的弱导电和非导电孔隙。通过基于本文的进一步研究，可以开发出越来越多的适应模型和一套全面的评估方法。