Pore-scale characterization and numerical analysis of single and multi-phase flow in carbonate reservoirs

Carbonate reservoirs host a significant portion of global hydrocarbon reserves; however, their complex pore systems resulting from post-depositional diagenesis cause significant heterogeneity and weaken the correlation between porosity and permeability. Understanding the pore size distribution, connectivity, and geometry within these reservoirs is essential for accurately assessing reservoir quality and predicting fluid flow behavior. This research investigates core samples from the D1 field in the Mumbai Offshore Basin through comprehensive analysis using thin-section petrography, routine core analysis, SEM imaging, and 3D µCT techniques. Additionally, Pore Network Modelling (PNM) simulations are employed to evaluate fluid flow behaviors and transport properties. Results underscore the critical role of fractures and secondary pores in influencing reservoir performance, providing valuable insights to enhance hydrocarbon recovery strategies and optimize reservoir management practice