National Oil and Gas Tool Update National Oil

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 9/9/2021 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 9/9/2021 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) 9/9/2021 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 9/9/2021 U. S. Environmental Protection Agency 5

Stationary Engine EFs • Fraction of Engines Subject to NSPS needed • Default will be set to zero 9/9/2021 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 9/9/2021 U. S. Environmental Protection Agency 7

Electric Compressor Engines • Default FE will be set to zero 9/9/2021 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 9/9/2021 • • • Liquids unloading Loading operations Mud degassing Pneumatic devices Produced water tanks Well completions 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 9/9/2021 U. S. Environmental Protection Agency 10

Gas Composition Calculator 9/9/2021 U. S. Environmental Protection Agency 11

Gas Composition Calculator 9/9/2021 U. S. Environmental Protection Agency 12

Gas Composition Calculator 9/9/2021 U. S. Environmental Protection Agency 13

GCC – Volume % Example 9/9/2021 U. S. Environmental Protection Agency 14

GCC – Volume % Example 9/9/2021 U. S. Environmental Protection Agency 15

GCC – Volume % Example 9/9/2021 U. S. Environmental Protection Agency 16

GCC – Volume % Example 9/9/2021 U. S. Environmental Protection Agency 17

GCC – Weight % Example 9/9/2021 U. S. Environmental Protection Agency 18

GCC – Weight % Example 9/9/2021 U. S. Environmental Protection Agency 19

GCC – Weight % Example 9/9/2021 U. S. Environmental Protection Agency 20

GCC – Weight % Example 9/9/2021 U. S. Environmental Protection Agency 21

GCC – Weight % Example 9/9/2021 U. S. Environmental Protection Agency 22

Questions? 9/9/2021 U. S. Environmental Protection Agency 23