1. National Oil and Gas Tool Update
National Oil and Gas Committee
February 8, 2018

2. National Oil and Gas Tool Update
Engine Updates
Emission factor updates
Electric compressor engines
Gas Composition Calculator
User provides gas composition
Calculator generates Tool basin factors
11/9/2018
U.S. Environmental Protection Agency

3. U.S. Environmental Protection Agency
Engine Updates
Emission Factor Updates
Non-Road engines (MOVES model)
Stationary engines (NSPS limits)
Electric Compressor Engines
Electric-driven motors
Lateral compressor engines
Wellhead compressor engines
11/9/2018
U.S. Environmental Protection Agency

4. Emission Factor Updates
Non-Road Engine Emission Factors
Drilling, Fracturing
Currently based on 2011 (NONROAD)
Update to reflect 2017 (MOVES – replaces NONROAD)
Stationary Engine Emission Factors
Artificial Lift, Lateral/Wellhead Compressors
Currently use AP-42 emission factors
NSPS limits CO, NOx, and VOC (~post-2011)
11/9/2018
U.S. Environmental Protection Agency

5. U.S. Environmental Protection Agency
Stationary Engine EFs
NSPS has lower NOx limits than AP-42 factors
NSPS has higher VOC limits than AP-42 factors
11/9/2018
U.S. Environmental Protection Agency

6. U.S. Environmental Protection Agency
Stationary Engine EFs
Fraction of Engines Subject to NSPS needed
Default will be set to zero
11/9/2018
U.S. Environmental Protection Agency

7. Electric Compressor Engines
Tool currently accommodates electric Artificial Lift engines
Same functionality to be added
Lateral compressor engines
Wellhead compressor engines
Fraction electric (FE) needed
11/9/2018
U.S. Environmental Protection Agency

8. Electric Compressor Engines
Default FE will be set to zero
11/9/2018
U.S. Environmental Protection Agency

9. Gas Composition Calculator
Gas composition data used in the Tool for the following source categories:
Associated gas
Condensate tanks
Crude oil tanks
Dehydrators
Fugitives
Gas-actuated pumps
Liquids unloading
Loading operations
Mud degassing
Pneumatic devices
Produced water tanks
Well completions
11/9/2018
U.S. Environmental Protection Agency

10. Gas Composition Calculator
Excel-based workbook
README sheet with description/instructions
Calculator sheets for each source category
User provides gas composition
Weight %
Volume %
Calculator generates Tool basin factors
11/9/2018
U.S. Environmental Protection Agency

11. Gas Composition Calculator
11/9/2018
U.S. Environmental Protection Agency

12. Gas Composition Calculator
11/9/2018
U.S. Environmental Protection Agency

13. Gas Composition Calculator
11/9/2018
U.S. Environmental Protection Agency

14. U.S. Environmental Protection Agency
GCC – Volume % Example
11/9/2018
U.S. Environmental Protection Agency

15. U.S. Environmental Protection Agency
GCC – Volume % Example
11/9/2018
U.S. Environmental Protection Agency

16. U.S. Environmental Protection Agency
GCC – Volume % Example
11/9/2018
U.S. Environmental Protection Agency

17. U.S. Environmental Protection Agency
GCC – Volume % Example
11/9/2018
U.S. Environmental Protection Agency

18. U.S. Environmental Protection Agency
GCC – Weight % Example
11/9/2018
U.S. Environmental Protection Agency

19. U.S. Environmental Protection Agency
GCC – Weight % Example
11/9/2018
U.S. Environmental Protection Agency

20. U.S. Environmental Protection Agency
GCC – Weight % Example
11/9/2018
U.S. Environmental Protection Agency

21. U.S. Environmental Protection Agency
GCC – Weight % Example
11/9/2018
U.S. Environmental Protection Agency

22. U.S. Environmental Protection Agency
GCC – Weight % Example
11/9/2018
U.S. Environmental Protection Agency

23. U.S. Environmental Protection Agency
Questions?
11/9/2018
U.S. Environmental Protection Agency