02113nab a2200253 4500 20260520003059.0 260224s2012 xxu ing Inglés Evolution of Seismic Velocities in Heavy Oil Sand Reservoirs during Thermal Recovery Process nov./dic. 2012 07/05/2013 ; 07/05/2013 10 p. ; 1029-1039 Traducción del resúmen del autor: In thermally enhanced recovery processes like Cyclic Steam Stimulation (CSS) or Steam Assisted Gravity Drainage (SAGD), continuous steam injection entails changes in pore fluid, pore pressure and temperature in the rock reservoir, that are most often unconsolidated or weakly consolidated sandstones. This in turn increases or decreases the effective stresses and changes the elastic properties of the rocks. Thermally enhanced recovery processes give rise to complex couplings. 4D seismic surveys are currently conducted to delineate the steam-affected areas but the interpretation is difficult. However, it is essential for optimization of reservoir development. Numerical simulations have been carried out on a case study so as to provide an estimation of the evolution of pressure, temperature, pore fluid saturation, stress and strain in any zone located around the injector and producer wells. The approach of Ciz and Shapiro (2007) (Geophysics 72, A75-A79) has been used to model the velocity dispersion in the oil sand mass under different conditions of temperature and stress. A good agreement has been found between these predictions and some laboratory velocity measurements carried out on samples of Canadian oil sand. Results appear to be useful to better interpret 4D seismic data in order to locate the steam chamber. 6 Oil and Gas Science and Technology 67 ARTICULO Nauroy, J.F. 12682 Doan, D.H. 53109 Guy, N. 53106 Baroni, A. 53110 Delage, P. 53111 Mainguy, M. 19223 187660 187660 0 0 0 0 255479 BAAB BAAB 2026-03-06 200059795 0 200059795 2026-03-06 00:17:37 2026-03-06 ARTICULO