[list]

The Earth offers a finite amount of gas. Theses gas stocks take different forms and according to the gas kind and the region it come from, the price varies.

In order to find these parameters we need to find the data for the past production per year from the beginning of the production. The used data are taken from 1950 to 2020 there is several categories of gas which represent a percentage of the total production. These proportions change with the production year. In order to get an idea of this percentage, we use a linear evolution of each gas proportion between 2000 and 2020.

Production data sources : [^1] and [^2]

Gas data

|Year |Conventional gas (bcm)|tight (bcm)|shale (bcm)|Coalbed methane (bcm)|other (bcm)| | :------- | :---------- | :-----------: | :---------: | :-----------------: |:-----------------:| |1950 |184|12|0.2|3|0.8| |...|...|...|...|...|...| |2020|3068|268|564|88|11|

Fitting [^3]

To fit the curve with the maximum reserve estimate by BP we adjust the beginning year of the regression in order to take the year start at the beginning of the current peak and get realistic values for maximal stock.

Extraction Price [^4]

We use the price of the different type of as :

Other data [^3]

We take the mean price of the different gas type according their proportion in the global gas production.

To complete information about resource and demand the following data is also in the code :

| Region |gas type | current Reserve | Reserve unit | | :------- | :--------:| ---------: | :-----------------: | | World | all type | 188100 | billion cubic metres |

Sector using gas [^5]

| sector | proportion of the global demand per year in % | billion cubic metres| | :------- | :--------:| :----------:| |transport|7.3|279.0644| |residential|29.9|1143.0172| |commercial and public services |12.9|493.1412| |Industry|37|1414.436| |other sector|12.9|493.1412|

Data implemented in the gas demand csv.

References

[^1]: IEA 2022; World Energy Outlook 2021 Free Dataset, https://www.iea.org/data-and-statistics/data-product/world-energy-outlook-2021-free-dataset#tables-for-scenario-projections, License: CC BY 4.0. [^2]: Wang, Jianliang & Bentley, Yongmei - "Modelling world natural gas production." (2020) Energy. Vol. 1363-1372. 10.1016/j.egyr.2020.05.018. - Retrieved from: 'https://www.researchgate.net/publication/341598129_Modelling_world_natural_gas_production' [^3]: BP - Statistical Review of World Energy (2021) - Retrieved from: 'https://www.bp.com/content/dam/bp/business-sites/en/global/corporate/pdfs/energy-economics/statistical-review/bp-stats-review-2021-full-report.pdf' [^4]: Roberto F. Aguilera - "Production costs of global conventional and unconventional petroleum" (2014) Energy Policy Volume 64 Pages 134-140 ISSN 0301-4215 - Retrieved from: 'https://doi.org/10.1016/j.enpol.2013.07.118.https://www.sciencedirect.com/science/article/abs/pii/S0301421513007763' [^5]: IEA 2022; World Energy Balances, https://www.iea.org/data-and-statistics/charts/world-coal-final-consumption-by-sector-2018, License: CC BY 4.0.