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Classification and Petrophysical Characterization of Miocene Carbonate Reservoir in the Red River Basin, Vietnam
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 81st EAGE Conference and Exhibition 2019, Jun 2019, Volume 2019, p.1 - 5
Abstract
This study performs an integrated method using thin section and well log data to determine rock fabrics and their relationship with rock pore system in the Miocene carbonate reservoirs of well RR02, Southern Red River Basin, Vietnam. By carrying out thin section analysis, mineral components and pore types of carbonate rocks were estimated, creating a basis for carbonate classification and grouping samples into different petrophysical classes. Zoning, mineral identification and porosity estimation were then conducted based on the combination of different standart log curves, including Gamma Ray (GR), Photoelectric factor (PEF), Neutron porosity (NPHI), Density (RHOB) and Sonic (DT). In well RR02, carbonate reservoir was mostly made up by limestone and could be divided into two zones with lower zone affected by dolomitization with higher porosity. Four types of rock fabrics were diagnosed along nearly 90m-thick carbonate reservoir, namely, grainstone, grain-dominated packstone, wackstone and boundstone. Two main pore types were found corresponding to each identified carbonate fabric, including interparticle and vuggy pores estimated in range of 5.9% to 10% and 2.9% – 21.5%, respectively