1. Energy Information Administration, https://www.eia.gov/analysis/studies/worldshalegas/; 2011 [accessed February 1 2022].
2. Energy Information Administration, https://www.eia.gov/analysis/pdfpages/worldshalegasindex.php; 2015 [accessed February 1 2022].
3. Sedimentary rock types: relative proportions as a function of geological time;Garrels;Science,1969
4. Unconventional oil and gas resources handbook;Ma;Elsevier,2016
5. Fundamentals of gas shale reservoirs;Rezaee,2015