| 摘要 |
In one aspect, the method of the invention involves providing one or more vertical or substantially vertical wells which partially or fully penetrate a viscous oil reservoir. A non-thermal recovery process may be initiated whereby a hydrocarbon vapor is introduced into the reservoir so as to bring it into contact with the oil in the reservoir. The solvent is selected so that it is in the vapor phase at ambient temperature and pressure in the reservoir in the absence of heating. The hydrocarbon vapor may increase the mobility of the oil by means of diffusion or other mixing mechanisms, whereupon the oil may be permitted to drain under the influence of gravity to the lower reaches of the wellbore. From there, the oil may be lifted to the surface. |
