Integrated rock typing and pore facies analyses in a heterogeneous carbonate for saturation height modelling, a case study from Fahliyan Formation, the Persian Gulf

Abstract Knowledge of initial fluids saturation has great importance in hydrocarbon reservoir analysis and modelling. Distribution water (Swi) 3D models dictates the original oil place (STOIIP), which consequently influences reserve estimation dynamic Calculation heterogeneous carbonate reservoirs always is a challenging task, because these have complex depositional diagenetic history with pore network. This paper aims to model facies framework, reservoir. Petrographic studies were accomplished define facies, features types. Accordingly, isolated pores are dominant upper parts, while lower intervals contain more interconnected interparticle Generally, middle parts reservoir, alterations such as cementation compaction decreased primary potential. However, interval, mainly includes high-energy shoal high quality was formed by secondary dissolution moulds vugs. Using huge number drainage mercury injection capillary pressure tests, we evaluate ability FZI, r35Winland, r35Pittman, FZI* Lucia’s petrophysical classes definition rock Results show that recently introduced typing method an efficient way classify samples into types same characteristics. Moreover, this study MICP data available from every one meter results using much representative sample can be selected for SCAL laboratory case limitation tests samples. Integration petrographic analyses routine (RCAL) special (SCAL) core resulted recognition four studied Finally, order saturation, averaged each defined nonlinear curve fitting approach, parameters (M C) extracted. relationship between porosity used wells wells. As permeability prediction tasks, findings help log-derived porosity.