CO2 storage in organic material rich rock formation with hydrocarbon production

摘要

Process for producing hydrocarbons and / or storing CO2 in a rock formation rich in organic material. One embodiment of the method includes the steps of injecting the CO2 into an injection well in the organic material rich rock formation and producing the hydrocarbons from a production well when a drainage volume of the production well has an average reservoir pressure equal to or below a predetermined pressure. The hydrocarbons substantially include natural gas and the injection well is in fluid communication with the production well. The embodiment also includes closing the production well and feeding the CO2 into the injection well when the hydrocarbons produced include a CO2 mole fraction greater than or equal to a specified mole fraction.