Gas Composition Calculator Updates for National Oil and Gas Tool

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Stay updated with the latest gas composition data changes in the National Oil and Gas Tool, impacting emission factor calculations for various engine types in the oil and gas industry by 2025.

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Uploaded on Jun 24, 2025 | 0 Views

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

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 6/24/2025 U.S. Environmental Protection Agency 2

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 6/24/2025 U.S. Environmental Protection Agency 3

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) 6/24/2025 U.S. Environmental Protection Agency 4

Stationary Engine EFs NSPS has lower NOx limits than AP-42 factors NSPS has higher VOC limits than AP-42 factors 6/24/2025 U.S. Environmental Protection Agency 5

Stationary Engine EFs Fraction of Engines Subject to NSPS needed Default will be set to zero 6/24/2025 U.S. Environmental Protection Agency 6

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 6/24/2025 U.S. Environmental Protection Agency 7

Electric Compressor Engines Default FE will be set to zero 6/24/2025 U.S. Environmental Protection Agency 8

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 6/24/2025 U.S. Environmental Protection Agency 9

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 6/24/2025 U.S. Environmental Protection Agency 10