This page provides an overview of the Subpart W well venting for liquids unloading source category e-GGRT reporting requirements.

Please see Reporting Form Instructions on downloading the blank reporting form and uploading the completed reporting form.
You may also refer to Optional Calculation Spreadsheet Instructions to download the Subpart W calculation spreadsheet.

The well venting for liquids unloading source category is applicable to Onshore Petroleum and Natural Gas Production.

Indicate if the facility has the source type via the radio buttons.

• If the source type is present you must report required elements. 

If the facility has the source type, the Best Available Monitoring Methods and Missing Data table must be completed.

• For further information, see Best Available Monitoring Methods and Missing Data Reporting.

Worksheet Navigation

To navigate between tables use the navigational buttons provided at the top of the page and between tables or use the scroll bars.

Reporting Requirements

For Sub-basins using Calculation Method 1, the facility is required to report the following for each tubing diameter and pressure group combination within each Sub-basin category:

• Sub-basin ID - the pick list for this data element is populated based on the Sub-Basin Selection Tab.  Be sure a valid Sub-basin ID is used.
• Tubing diameter group/pressure group (98.236(c)(5)(i)
  • <1 inch, <25 psig
  • <1 inch, >25 psig and <60 psig
  • <1 inch, >60 psig and <110 psig
  • <1 inch, >110 psig and <200 psig
  • <1 inch, >200 psig
  • >1 inch and <2.375 inches, <25 psig
  • >1 inch and <2.375 inches, >25 psig and <60 psig
  • >1 inch and <2.375 inches, >60 psig and <110 psig
  • >1 inch and <2.375 inches, >110 psig and <200 psig
  • >1 inch and <2.375 inches, >200 psig
  • >2.375 inches, <25 psig
  • >2.375 inches, >25 psig and <60 psig
  • >2.375 inches, >60 psig and <110 psig
  • >2.375 inches, >110 psig and <200 psig
  • >2.375 inches, >200 psig
• Number of wells vented for liquids unloading (98.236(c)(5)(i))
• Number of plunger lifts (98.236(c)(5)(i)(B))
• Cumulative number of unloadings vented within tubing diameter group/pressure group
• Annual total CO₂ emissions (98.236(c)(5)(i)(H))
• Annual total CH₄emissions (98.236(c)(5)(i)(H))
• Average flow rate of the measured well venting (cubic feet per hour) (98.236(c)(5)(i)(D))
• For the single representative well in the sub-basin, the facility is required to report the following for each tubing diameter group and pressure group combination in the sub-basin category:
  • Did well selected from the tubing diameter and pressure group have a plunger lift? (Yes or No) (98.236(c)(5)(i)(B))
    • If Yes, the facility is required to report:
      • Tubing pressure (98.236(c)(5)(i)(G))
      • Internal tubing diameter (98.236(c)(5)(i)(E))
    • If No, the facility is required to report:
      • Casing Pressure (98.236(c)(5)(i)(F))
      • Internal Casing Diameter (98.236(c)(5)(i)(E))
  • Depth of the Well (98.236(c)(5)(i)(E))

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For Sub-basins using Calculation Method 2, the facility is required to report:

• Sub-basin ID - the pick list for this data element is populated based on the Sub-Basin Selection Tab.  Be sure a valid Sub-basin ID is used.
• Number of wells vented for liquids unloading (without plunger lifts) (98.236(c)(5)(ii)(A))
• Average internal casing diameter (98.236(c)(5)(ii)(D))
• Total CO₂ emissions (98.236(c)(5)(ii)(E))
• Total CH₄ emissions (98.236(c)(5)(ii)(E))
• Cumulative number of unloadings vented to the atmosphere (98.236(c)(5)(ii)(C))

For Sub-basins using Calculation Method 3, the facility is required to report:

• Sub-basin ID - the pick list for this data element is populated based on the Sub-Basin Selection Tab.  Be sure a valid Sub-basin ID is used.
• Number of wells vented for liquids unloading (with plunger lifts) (98.236(c)(5)(ii)(A))
• Number of plunger lifts (98.236(c)(5)(ii)(B))
• Average internal tubing diameter (98.236(c)(5)(ii)(D))
• Total CO₂ emissions (98.236(c)(5)(ii)(E))
• Total CH₄ emissions (98.236(c)(5)(ii)(E))
• Total number of unloadings vented to the atmosphere (98.236(c)(5)(ii)(C))

Total Emissions

The total emissions roll-up at the top of the sheet reflects the sum of the CO₂ equivalents of each gas emission reported for the source type.  These summations are reflected and aggregated on the Introduction tab.