Subterranean capture of produced gas lost in gas enhanced hydrocarbon recovery

A process comprising:

• injecting a produced gas into a subterranean formation via a horizontal portion of a first wellbore that extends into the subterranean formation, the subterranean formation comprising a hydrocarbon reservoir;
• recovering a hydrocarbon-containing fluid containing a first portion of the injected produced gas from a horizontal portion of a second wellbore that extends into the subterranean formation, wherein a depth of the horizontal portion of the first wellbore in the subterranean formation is greater than a depth of the horizontal portion of the second wellbore in the subterranean formation;
• and
• recovering a second portion of the injected produced gas, not recovered as part of a hydrocarbon-containing fluid from the hydrocarbon reservoir, as captured produced gas from a gas capture wellbore that extends into the subterranean formation, wherein the gas capture wellbore has (1) a horizontal portion having a gas capture depth that is less than the depth of the horizontal portion of the second wellbore and (2) is located in a gas capture zone, wherein the gas capture zone i) does not contain hydrocarbons, or ii) contains hydrocarbons that are not recoverable through primary, secondary, or enhanced hydrocarbon recovery.