Título del libro: Spe Latin American And Caribbean Petroleum Engineering Conference Proceedings
Título del capítulo: Determination of Rock Compressibility in Unconsolidated Sand in Heavyand Extra-Heavy Oil Fields in Mexico
HEBER CINCO LEY;
Autores externos:
Idioma:
Año de publicación:
2023
Palabras clave:
Air; Compressibility; Crude oil; Gasoline; Geomechanics; Heavy oil production; Pattern recognition; Petroleum reservoir engineering; Petroleum reservoirs; Sandstone; Uncertainty analysis; Biot coefficients; Heavy oil field; Laboratory experiments; Me-xico; Petrophysics; Pore compressibility; Rock compressibility; Unconsolidated sands; Unconsolidated sandstone reservoirs; Water saturations; Elastic moduli
Resumen:
Unconsolidated sands in heavy and extra-heavy oil fields in Mexico have significant potential that has notbeen fully evaluated yet. Thus, this paper examines petrophysics and geomechanical aspects with a view toestimating rock compressibility. This is important since determining this parameter from cores has provedto be difficult many times as the samples tend to collapse easily during laboratory experiments. The proposed method uses an empirical correlation for estimating Biot coefficient (Li et al., 2020) andmore established geomechanical equations written in such a way as to allow the estimation of several typesof compressibilities including: bulk compressibility, uniaxial bulk compressibility, pore compressibility,uniaxial pore compressibility, and pore compressibility under hydrostatic load. The data are loaded on aPickett plot (1966, 1973) to demonstrate the value of pattern recognition. There are several intermediate results from calculations leading to the compressibilities mentioned above.These include process speed (ratio of permeability and porosity), pore throat aperture in microns at 35percent cumulative pore volume (rp35), water saturation (Sw), mercury-air capillary pressure (pc), pore throatapertures (rp) at different water saturations, Biot coefficient (a), Poisson's ratio (PR), shear modulus (G),Young's modulus (YM), and fluid compressibility (cf). An important observation is that although use of the equations presented in the paper are straight forwardand lead to quick calculation of all parameters mentioned above, it is likely that calculations from well logswithout using pattern recognition may lead to uncertain results. The novelty of the paper is developing a methodology for calculating diverse types of rockcompressibilities in unconsolidated sandstone reservoirs. Application of the methodology can lead toimproved calculated recovery factors of unconsolidated sandstone reservoirs in heavy and extra-heavy oilfields in Mexico by at least 10%. © 2023 Society of Petroleum Engineers (SPE). All rights reserved.
Entidades citadas de la UNAM:
ISBN:
9781613999905
Editorial:
Society of Petroleum Engineers (SPE)
