Enhanced solvent recovery from tight rock and shale oil wells

A method for enhanced recovery of liquid solvent remaining in a stimulated reservoir volume of a hydraulically fractured tight rock or shale oil reservoir following prior cyclic liquid solvent enhanced recovery (CLS-EOR) of oil, the solvent having been previously introduced during the CLS-EOR via one or more wells to mobilize the oil, the stimulated reservoir volume further comprising a portion of the mobilized oil, the method comprising:

• a) injecting, during an injection period, via at least one well of the one or more wells, pressures from 1000 to 9000 psi, a compressed, gaseous displacing agent;
• and thereby (i) increasing pressure in the stimulated reservoir volume to form a miscible mixture of the injected gaseous displacing agent with the portion of the mobilized oil, the solvent, and dissolved field gas and (ii) inducing flow of the miscible mixture from the stimulated reservoir volume during a production period;
• and
• b) producing the miscible mixture from the stimulated reservoir volume via the at least one well during the production period.