Methods for producing oil and/or gas
AssigneeShell Oil Company
InventorsChia-Fu Hsu, Ronald Jan Schoonebeek
Life of this patent
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Abstract
A method for producing oil and/or gas comprising injecting a miscible enhanced oil recovery formulation into fractures, karsts, and/or vugs of a formation for a first time period from a first well; producing oil and/or gas from the fractures, karsts, and/or vugs from a second well for the first time period; injecting a miscible enhanced oil recovery formulation into the fractures, karsts, and/or vugs for a second time period from the second well; and producing oil and/or gas from the fractures, karsts, and/or vugs from the first well for the second time period.
Claims15
A method for producing oil from an underground formation comprising:
- injecting an enhanced oil recovery formulation into a first well in the formation, where the enhanced oil recovery formulation has a density greater than the oil in the formation and the enhanced oil recovery formulation provides buoyancy to the oil;
- forcing the oil towards a second well in the formation;
- producing the oil from the second well;
- and
- recovering the enhanced oil recovery formulation from the first well by injecting a recovery agent into the second well,
- wherein, the recovery agent has a density less than that of the enhanced oil recovery formulation.
Dependencies are inferred from the claim text.