Multifractal Analysis of the Structure of Organic and Inorganic Shale Pores Using Nuclear Magnetic Resonance (NMR) Measurement

The multifractal structure of shale pores significantly affects the occurrence fluids and permeability reservoirs. However, there are few studies on characteristics that distinguish between organic inorganic pores. In this study, we obtained pore size distribution (PSD) separately by using a new NMR-based method conducted analysis based PSD. We then investigated geological significance two characteristic parameters. results showed structures both have characteristics. Inorganic stronger heterogeneity poorer connectivity compared to affect irreducible water saturation. Greater in lower higher Meanwhile, better leads adsorption capacity weak impact having saturation also indicate parameters can be regarded as an index for estimating flowback rate fracturing fluid, evaluating quality