Computerized geochemical modeling of burial diagenesis of the Eocene turbidite reservoir elements: Urucutuca Formation, Espírito Santo Basin, southeastern Brazil passive margin

Abstract

The computerized geochemical modeling, a useful tool to understand the diagenetic processes influencing the quality of hydrocarbon reservoirs, is performed by using different modules of computer codes based on the thermodynamic and chemical kinetic principles and their associated parameters. As observed in the reservoir lithofacies deposited from the marine sediment-gravity flows, a case study of diagenesis is presented here from the Espírito Santo Basin in southeastern Brazil. The study uses the Geochemist's Workbench (GWB™), PHREEQC™ and TOUGHREACT™ computation packages. The comparison of performances of these packages demonstrates the convergence of results from the software-based geochemical modeling with the petrographic observation of dissolution, albitization, kaolinization, and the precipitation of calcite and dolomite. Moreover, with limited data points, e.g., the sedimentary petrographic data acquired from limited number of boreholes, the computer simulation establishes itself to be a powerful quantitative method estimating the degree and type of diagenetic alteration of turbidite reservoir bodies in contact with a source of saline-water influx associated with salt tectonics. Therefore, using the limited petrographic data points, the geochemical computer-simulation method can even be utilized and extrapolated for areas where similar geological context is interpreted but no borehole data are available. Hence, porosity of turbidite reservoir lithofacies can be predicted in relation to the spatial distribution of dissolution, kaolinization, and albitization of feldspars and authigenic carbonate precipitation.

Comparative study using different external sources of aluminum on the zeolites synthesis from rice husk ash

“…Geological carbon storage is a path that involves CO 2 capture from the exhaust gases stored in an environment and henceforth, prevents it from entering the atmosphere again. These low carbon dioxide emissions can be predicted by geochemical modeling [54][55][56][57]. One of the existing technologies involves CO 2 capture post-combustion, using adsorption as a selective process where the constituent molecules in a mixture of gases adhere on the solid surface (zeolites) [26,[58][59][60][61][62].…”

Spectroscopic Methods to Determination of Geothite in Kaolinite

“…The chemical composition of the solid, liquid and gaseous materials can be easily determined by the X-Ray Fluorescence Spectroscopy (XRF), which allows the identification and quantification of chemical elements from almost the entire periodic table Klunk et al, 2018). When a sample is irradiated with primary X-Rays, the electron of the innermost layer of the atom is ejected, causing a void.…”

Geochemical Speciation and Batch Mode Simulation in the Carbonate Depositional Environments

“…Chemical speciation is used to evaluate the distribution of certain chemical species with different chemical forms and oxidation states (Purkait and Mukherjee, 2008;De Stefano et al, 1999;Foti et al, 2000). A geochemical modeling system attempts to map all the reactions and events of the modeled environment (Klunk et al 2018;Chidambaram et al, 2011a). These events include complexation, oxidation, reduction, precipitation, and dissolution.…”

“…These simulations also assessed the diagenetic processes such as natural formation and alteration of rocks (Lai et al, 2018;Limarino et al, 2017;Crémière et al, 2016;Klunk et al, 2015;Udchachon et al, 2011). It is impossible to reproduce the exact behavior of most geochemical systems in the laboratory due to the complexity and diversity in time scale of the reactions in geological environments (Klunk et al, 2018).…”