Reducing the carbon emissions intensity of a fuel

1. A method for reducing a life cycle carbon emissions intensity of a fuel, comprising:

injecting a carbon dioxide fluid from a source of atmospheric carbon dioxide fluid into a first wellbore;

producing a hydrocarbon fluid from a second wellbore to a terranean surface;

producing a fuel from the produced hydrocarbon fluid;

determining a life cycle emissions credit for the produced fuel based on the injection of the atmospheric carbon dioxide fluid; and

determining a reduced life cycle carbon emissions intensity value of the produced fuel based on the determined life cycle emissions credit.

2. The method of claim 1 , further comprising supplying the source of the atmospheric carbon dioxide fluid from at least one of:

an industrial process that captures carbon dioxide from the atmosphere; or

a biomass carbon dioxide source comprising carbon fixed from the atmosphere by photosynthesis.

3. The method of claim 2 , wherein the industrial process comprises:

directing ambient air through a packing material;

flowing a carbon dioxide absorbing fluid over the packing material;

capturing the atmospheric carbon dioxide in the carbon dioxide absorbing fluid; and

separating the captured atmospheric carbon dioxide from the carbon dioxide absorbing fluid.

4. The method of claim 3 , further comprising:

receiving the captured atmospheric carbon dioxide; and

using the received captured atmospheric carbon dioxide as the injected carbon dioxide fluid into the first wellbore.

5. The method of claim 1 , wherein the produced fuel comprises the reduced life cycle carbon emissions intensity value, relative to a baseline life cycle carbon emissions intensity value, based on the injection of the atmospheric carbon dioxide fluid.

6. A method for reducing a life cycle carbon emissions intensity of a fuel, comprising:

capturing a carbon dioxide fluid from a source that comprises an industrial process that captures carbon dioxide from the atmosphere, the industrial process comprising:

directing ambient air through a packing material;

flowing a carbon dioxide absorbing fluid over the packing material;

capturing the carbon dioxide from the ambient air in the carbon dioxide absorbing fluid; and

separating the captured atmospheric carbon dioxide from the carbon dioxide absorbing fluid;

providing the captured carbon dioxide fluid to a refining process;

producing a fuel from the refining process;

determining a life cycle emissions credit for the produced fuel based on the injection of the atmospheric carbon dioxide fluid; and

determining a reduced life cycle carbon emissions intensity value of the produced fuel based on the determined life cycle emissions credit.

7. The method of claim 6 , further comprising capturing an additional amount of the carbon dioxide fluid from

a biomass carbon dioxide source that comprises carbon fixed from the atmosphere by photosynthesis.

8. The method of claim 6 , wherein flowing a carbon dioxide absorbing fluid over the packing material comprises:

flowing the carbon dioxide absorbing fluid over the packing material in a series of pulses.

9. The method of claim 8 , wherein

flowing the carbon dioxide absorbing fluid over the packing material in a series of pulses comprises:

applying the liquid over the packing material at a first flow rate of the liquid during a first portion of a time duration, the first portion comprising a sufficient time duration to substantially replace a previous portion of the liquid on the packing with a new portion of the liquid that has a greater carbon dioxide absorption rate than the previous portion of the liquid;

applying, with the pump, the liquid over the packing material at a second flow rate of the liquid applied during a second portion of the time duration; and

absorbing at least a portion of the atmospheric carbon dioxide with the liquid at a predetermined duty cycle based on the time duration.

10. A method for reducing a life cycle carbon emissions intensity of a fuel, comprising:

receiving a fuel refined from a raw hydrocarbon fluid produced from a geologic formation into which a fluid that contains carbon dioxide captured from the atmosphere was injected;

determining a lifecycle emissions credit for the refined fuel based on the injection of the atmospheric carbon dioxide fluid;

determining that the fuel comprises a reduced life cycle carbon emissions intensity value based on the determined life cycle emissions credit; and

providing the fuel as a low-carbon fuel based on the reduced life cycle carbon emissions intensity value.

11. The method of claim 10 , wherein the captured atmospheric carbon dioxide fluid comprises atmospheric carbon dioxide supplied by at least one of:

an industrial process that captures carbon dioxide from the atmosphere; or

a biomass carbon dioxide source comprising carbon fixed from the atmosphere by photosynthesis.

12. The method of claim 11 , wherein the industrial process comprises:

directing ambient air through a packing material;

flowing a carbon dioxide absorbing fluid over the packing material;

capturing the atmospheric carbon dioxide in the carbon dioxide absorbing fluid;

separating the captured atmospheric carbon dioxide from the carbon dioxide absorbing fluid.

13. A method of producing a hydrocarbon fuel with reduced life cycle carbon intensity, the method comprising:

receiving a hydrocarbon fluid that has been produced from a geologic formation through a wellbore to a terranean surface, the hydrocarbon fluid produced, at least partially, from the geologic formation with an atmospheric carbon dioxide fluid injected into the geologic formation;

refining the received hydrocarbon fluid into a fuel;

determining a life cycle emissions credit for the refined fuel based on the injection of the atmospheric carbon dioxide fluid; and

determining a reduced life cycle carbon emissions intensity value of the produced fuel based on the determined life cycle emissions credit.

14. The method of claim 13 , further comprising supplying the atmospheric carbon dioxide fluid from at least one of:

an industrial process that captures carbon dioxide from the atmosphere; or

a biomass carbon dioxide source comprising carbon fixed from the atmosphere by photosynthesis.

15. The method of claim 14 , wherein the industrial process comprises:

directing ambient air through a packing material;

flowing a carbon dioxide absorbing fluid over the packing material;

capturing the atmospheric carbon dioxide in the carbon dioxide absorbing fluid;

separating the captured atmospheric carbon dioxide from the carbon dioxide absorbing fluid.