In-situ sweep testing system and method for conducting in-situ oil recovery sweep testing

A method for conducting in-situ oil recovery sweep testing, the method comprising:

• introducing an injection fluid into a main wellbore and at least one injection tunnel, the injection tunnel extending from the main wellbore in a perpendicular direction to a length direction of the main wellbore to extract a produced fluid in at least one production tunnel, the production tunnel extending from the main wellbore in the perpendicular direction to the length direction of the main wellbore and parallel to the at least one injection tunnel;
• monitoring conditions of the at least one production tunnel with a monitoring system comprising at least one sensor located in, or at an opening of, the at least one production tunnel;
• and
• collecting the produced fluid from the at least one production tunnel with a recovering tube at least partially located in, or at the opening of, the at least one production tunnel,
• wherein:
• a diameter of the at least one injection tunnel is 7 inches or less, and
• a diameter of the at least one production tunnel is 7 inches or less.

A method for conducting sequential in-situ oil recovery sweep testing, the method comprising:

• locating a recovering tube at least partially in, or at an opening of, a target production tunnel of at least two production tunnels extending from a main wellbore in a perpendicular direction to a length direction of the main wellbore and parallel to at least one injection tunnel extending from the main wellbore in the perpendicular direction to the length direction of the main wellbore;
• conducting a sweeping process comprising:
• introducing an injection fluid into the main wellbore and the at least one injection tunnel to extract a produced fluid in the target production tunnel;
• monitoring conditions of the target production tunnel with a monitoring system comprising at least one sensor located in, or at the opening of, the target production tunnel;
• collecting the produced fluid from the target production tunnel with the recovering tube at least partially located in, or at the opening of, the target production tunnel;
• and
• isolating the target production tunnel to be an isolated production tunnel;
• and
• repeating the locating the recovering tube and the conducting the sweeping process,
• wherein:
• the target production tunnel is a most upstream production tunnel excluding the isolated production tunnel.