Rock Typing of Upper Cretaceous Rocks Using Core Analysis Data and Resistivity Logs

Rock typing is one of the most important tasks to be solved during the preparation of petrophysical model. Increasing number of new carbonate reservoirs, as complex and unique sedimentary deposits, requires a concentration of efforts aimed at increasing the efficiency of linking core analysis results and interpretation of well logging. The aim of this work is to combine rock typing methods into integrated system and to obtain input data on its basis for petrophysical modelling. This work involved well logging and core analysis results for 513 core samples. Initial types were selected in accordance with the sedimentary environment and the energy level of hydrodynamic processes. Determined rock type boundaries were linked to the results of mercury injection data (A.J. Katz and A.H. Thompson, 1986; Kamath J., 1992; Abedini A., 2011). Typing process also involved estimation of flow zone indicator (McPhee C. et al, 2015: Tiab D., Donaldson E.C., 2015) and classical approaches for carbonate reservoir characterization (Lucia, F.J., 2007). The results of typing were combined with the resistivity logs.