Increasing hydrocarbon recovery from reservoirs

A method of producing hydrocarbons from a low permeability reservoir formation, the method comprising, in a well in a low permeability reservoir formation, the well comprising a plurality of hydraulic fractures, each fracture being designated as one of a first set of fractures and a second set of fractures:

• injecting an injection fluid from one of two sections of an outer casing of a tubular into at least one of the second set of fractures to increase a pressure in the low permeability reservoir, wherein the outer casing comprises a dividing wall dividing the outer casing into the two sections;
• and
• producing hydrocarbons from at least one of the first set of fractures such that the hydrocarbons flow into the other of the two sections of the outer casing,
• wherein the tubular comprises a set of first openings in fluid connection with the first fluid conduit, each first opening being located to substantially align with one of the first set of fractures, and a set of second openings in fluid connection with the second fluid conduit, each second opening being located to substantially align with one of the second set of fractures, wherein each first opening is offset along a length of the tubular relative to the nearest opening that is in fluid connection with the second fluid conduit.

A tubular for producing hydrocarbons from a low permeability reservoir formation, the tubular comprising:

• an outer casing comprising a dividing wall dividing the outer casing into two sections;
• wherein one of the two sections forms a first fluid conduit arranged to transport produced hydrocarbons;
• the other of the two sections forms a second fluid conduit arranged to transport an injection fluid;
• a first opening in the outer casing in fluid connection with the first fluid conduit, the first opening arranged to substantially align with a first fracture in the formation;
• and
• a second opening in the outer casing in fluid connection with the second fluid conduit, the second opening arranged to substantially align with a second fracture in the formation,
• wherein the first opening is offset along a length of the tubular relative to the nearest opening that is in fluid connection with the second fluid conduit.

A system for producing hydrocarbons from a low permeability reservoir formation, the system comprising:

• a wellbore in the low permeability reservoir formation, the wellbore having a plurality of fractures in the formation induced by hydraulic fracturing at known locations;
• a tubular comprising an outer casing, wherein the outer casing comprises a dividing wall dividing the outer casing into two sections;
• one of the two sections forming a first fluid conduit located in the wellbore and arranged to transport produced hydrocarbons;
• the other of the two sections forming a second fluid conduit located in the wellbore and arranged to transport an injection fluid;
• a set of first openings in fluid connection with the first fluid conduit, each first opening being located to substantially align with one of a first set of fractures;
• and a set of second openings in fluid connection with the second fluid conduit, each second opening being located to substantially align with one of a second set of fractures,
• wherein the first opening is offset along a length of the tubular relative to the nearest opening that is in fluid connection with the second fluid conduit.