STEAM-GENERATING PROCESS AND PROCESS FOR RECOVERING CRUDE OIL BY STEAM-ASSISTED GRAVITY DRAINAGE (SAGD) THAT INCLUDES SAID STEAM-GENERATING PROCESS

摘要

This process consists in (a) compressing the feed water to a low pressure; (b) filtering the feed water; (c) compressing the stream of filtered water to a medium pressure; (d) introducing said stream of filtered water, compressed to medium pressure, into the liquid phase of an instantaneous expansion tank; (e) in the tank, reheating said stream from step (d) by mixing with the recycled stream (h); (f) recompressing the liquid fraction in said tank to a high pressure and sending it to the inlet of a heat exchanger; (g) heating the liquid fraction in the exchanger while keeping it in the liquid state; (h) recycling the fraction originating from step (g) to said tank; and (i) expanding the stream from step (h) in said expansion tank, generating the desired steam by instantaneous expansion; and (j) separating the solid particles formed in the form of a second purge formed of water and said particles.