natural gas production GHG emissions

2 years 3 days ago #14 by goldabroad
natural gas production GHG emissions was created by goldabroad
Could you tell me how to use GHGenius to estimate the GHG emissions on different stages: natural gas extraction/production, processing, transmission,and distribution? Thanks!

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2 years 1 day ago #15 by rdo
Replied by rdo on topic natural gas production GHG emissions
To find these results we will be using the Upstream Results HHV page. On this page there are results for many different natural gas scenarios, the most basic of which being CNG from NG, in column Q. Some others include LNG from NG in column P, or NG for industry use in column DA. These pathways are all very similar until the point of distribution and dispensing.

Back in column Q we can see that the pathway is already broken out into multiple stages and some of them line up exactly with what you're looking for. I'm going to dive a bit into each of these stages of the pathway, based on the default Canada case.

Fuel Dispensing
This is emissions at the service station. It takes into account joules of energy required for each joule of NG, and fuel boil off while compressing, liquefying and dispensing the gas. Ignoring some of the downstream efficiency factors, this number is largely based off of information on the Service Stations sheet (data leaves that sheet at cell B14). There are inputs on Service Stations and on the Input sheet that will change this stage.

Fuel Distribution and Storage
Fuel distribution and storage includes any energy used in the local distribution systems (usually very minor) and the fugitive emissions from the distribution system.

Fuel Production
Based off the energy input to natural gas liquid plant processing. The active value here that drives most of the emissions is on Natural Gas Supply at cell I32. This is based on a sumproduct of the production region from rows 38 to 80, and the gas processing energy by fuel type in rows 336 to 378. It also includes fugitive emissions from gas processing plants.

Feedstock Transmission
This is a sum of multiple modes of transportation. The high pressure transmission pipeline energy is calculated on the Transport sheet, in row 20, based on a split of different intended uses and their relative distances. But the base energy input for both the pipeline and any tanker transmission is calculated on Natural Gas Supply in row 81. Both pipeline and tanker energy are regionalized, in cells D81 and E81 respectively.

Feedstock Recovery
Based off the energy input for natural gas production. The active value here is on Natural Gas Supply at cell I72. Like Fuel Production it is a sumproduct between the production region and the sum of the drilling and the gas production energy requirements, both in rows 336 to 378.

CO2, H2S removed from NG
The CO2 that is removed at the gas plants to produce pipeline quality gas from the raw gas is reported here.

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