Q445. What gases must be reported by oil and natural gas system facilities?
A445. Summary of Source Types by Industry Segment. Each facility must report:
• Carbon Dioxide (CO2) and methane (CH4) emissions from equipment leaks and vented emissions. The table below identifies each source type that industry segments are required to report. For example, natural gas processing facilities must report emissions from seven specific source types, and underground storage must report for five source types.
• CO2, CH4, and nitrous oxide (N2O) emissions from gas flares by following the requirements of subpart W.
• CO2, CH4, and N2O emissions from stationary and portable fuel combustion sources in the onshore production industry segment following the requirements in subpart W.
• CO2, CH4, and N2O emissions from stationary combustion sources in the natural gas distribution industry segment following the requirements in subpart W.
• CO2, CH4, and N2O emissions from all other applicable stationary combustion sources following the requirements of 40 CFR 98 subpart C (General Stationary Fuel Combustion Sources).
Source Type | Offshore Production | Onshore Production | Natural Gas Processing | Natural Gas Transmission Compression | Under-ground Storage | LNG Storage | LNG Import and Export Equipment | Distribution |
Natural gas pneumatic device venting |
| X |
| X | X |
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Natural gas driven pneumatic pump venting |
| X |
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Acid gas removal vent |
| X | X |
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Dehydrator vent |
| X | X |
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Well venting for liquids unloading |
| X |
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Gas well venting during well completions and workovers with hydraulic fracturing |
| X |
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Gas well venting during well completions and workovers without hydraulic fracturing |
| X |
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Blowdown vent stacks |
|
| X | X |
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| X |
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Onshore production storage tanks |
| X |
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Transmission storage tanks |
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| X |
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Well testing venting and |
| X |
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Associated gas venting and flaring |
| X |
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Flare stacks* |
| X | X |
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Centrifugal compressor venting |
| X | X | X | X | X | X |
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Reciprocating compressor rod packing venting |
| X | X | X | X | X | X |
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Other emissions from equipment leaks |
| X | X | X | X | X | X | X |
Population Count and Emissions Factor |
| X |
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| X | X | X | X |
Vented, Equipment Leaks and Flare Emissions Identified in BOEMRE GOADS Study | X |
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Enhanced Oil Recovery hydrocarbon liquids dissolved CO2 |
| X |
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Enhanced Oil Recovery injection pump blowdown |
| X |
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Onshore Petroleum and Natural Gas Production and Natural Gas Distribution Combustion Emissions |
| X |
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| X |
* Calculation methodologies for determining flare emissions are outlined in subpart W under applicable emissions sources.
Updated on