Efforts to untie the multicollinearity knot and identify factors controlling macropore structures in shale oil reservoirs

• DOI: 10.46690/ager.2024.03.04
• Publication Date: 2024-02-07T13:36:04Z
• Authors: Ziyi Wang; Lin Dong; Zhijun Jin; Shuangmei Zou; Jinhua Fu; Rukai Zhu
• Keywords: Macropore

Traditional correlation analyses based on whole-rock data have limitations in discerning pore development determinants shale oil reservoir, given the complex lithology of formations and intricate interdependencies (multicollinearity) among geological variables. In this study, mercury injection capillary pressure digital analysis scanning electron microscopy were employed to examine macropore structures both whole rocks their constituent lithologies for Upper Triassic Chang-7 Ordos Basin. Variations observed clay (shale primarily consisting clay-sized mineral grains), massive siltstone silty laminae within shale. Through combination microscope technique, it was demonstrated that total organic carbon content controls level development, while governs types structures. Although quartz pyrite exhibit correlations with volume, they do not emerge as primary factors; instead, appear interconnected carbon. Due detrital framework preservation during compaction, larger macropores are more developed siltstones than Additionally, laminae, situated closer source rock influenced by acids, a higher abundance dissolution pores, potentially favoring development. This study overcomes traditional method constraints, disentangling multi-correlations, providing new insights into mechanisms, advancing exploration production. Document Type: Original article Cited as: Wang, Z., Dong, L., Jin, Zou, S., Fu, J., Zhu, R. Efforts untie multicollinearity knot identify factors controlling reservoirs. Advances Geo-Energy Research, 2024, 11(3): 194-207. https://doi.org/10.46690/ager.2024.03.04