In: Journal of Hydrology and Hydromechanics, vol. 67, no. 4
William Godoy - Elizabeth M. Pontedeiro - Fernanda Hoerlle - Amir Raoof - Martinus Van Genuchten - José Santiago - Paulo Couto
Detaily:
Rok, strany: 2019, 372 - 383
Jazyk: eng
Kľúčové slová:
Pore network modeling; Carbonate rock; Coquina; Absolute permeability; µCT.
URL originálneho zdroja: http://www.ih.sav.sk/jhh
O článku:
Carbonate rocks host several large water and hydrocarbon reservoirs worldwide, some of them highly heterogeneous
involving complex pore systems. Pre-salt reservoirs in the Santos Basin off the south-east coast of Brazil, are an
example of such rocks, with much attention focused on proper characterization of their petrophysical and multiphase
flow properties. Since it is very difficult to obtain rock samples (coquinas) from these very deep reservoirs, analogues
from north-eastern Brazil are often used because of very similar geological age and petrophysical properties. We used a
coquina plug from an outcrop in a quarry in northeast Brazil to perform a comprehensive set of analyses. They included
Scanning Electron Microscopy (SEM), Energy-Dispersive X-ray Spectroscopy (EDS), X-ray Diffraction (XRD), and
micro-computed tomography (μCT) image acquisition using a series of pixel sizes, as well as direct permeability/
porosity measurements. Some of the experimental data were collected from the plug itself, and some from a small
sample of the rock slab, including thin sections. Results included the carbonate rock composition and the pore system at
different scales, thus allowing us to reconstruct and model the porosity and absolute permeability of the coquina using
3D digital imaging and numerical simulations with pore network models (PNMs). The experimental and numerical data
provided critical information about the well-connected pore network of the coquina, thereby facilitating improved predictions
of fluid flow through the sample, with as ultimate objective to improve hydrocarbon recovery procedures.
Ako citovať:
ISO 690:
Godoy, W., Pontedeiro, E., Hoerlle, F., Raoof, A., Van Genuchten, M., Santiago, J., Couto, P. 2019. Computational and experimental pore-scale studies of a carbonate rock sample. In Journal of Hydrology and Hydromechanics, vol. 67, no.4, pp. 372-383. 0042-790X (until 2019) . DOI: https://doi.org/10.2478/johh-2019-0009
APA:
Godoy, W., Pontedeiro, E., Hoerlle, F., Raoof, A., Van Genuchten, M., Santiago, J., Couto, P. (2019). Computational and experimental pore-scale studies of a carbonate rock sample. Journal of Hydrology and Hydromechanics, 67(4), 372-383. 0042-790X (until 2019) . DOI: https://doi.org/10.2478/johh-2019-0009
O vydaní:
Vydavateľ: VEDA, Publishing House of the Slovak Academy of Sciences, Bratislava, Slovakia
Publikované: 15. 12. 2019