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In Sweden and Denmark, the Skegerrak-Kattegat Basin contains the Cambrian–Ordovician Alum Shale, which has also been studied extensively.<ref>Lewan, M. D., and B. Buchardt, 1989, Irradiation of organic matter by uranium decay in the Alum Shale, Sweden: Geochemica et Cosmochimica Acta, v. 53, p. 1307–1322, doi:10.1016/0016-7037(89)90065-3.</ref><ref>Bharati, S., R. L. Patience, S. R. Larter, G. Standen, and I. J. F. Poplett, 1995, Elucidation of the Alum Shale kerogen structure using a multidisciplinary approach: Organic Geochemistry, v. 23, no. 11–12, p. 1043–1058, doi:10.1016/0146-6380(95)00089-5.</ref><ref> Buchardt, B., A. Thorshoj Nielsen, and N. Hemmingsen Schovsbo, 1997, Alun Skiferen i Skandinavien, Dansk Geologisk Forenings Nyheds: OG Informationsskirft, 32 p.</ref>. The Alum Shale is organic rich, with high TOC (11–22%) and HIo, yet generates primarily gas and condensate upon thermal conversion.<ref>Horsfield, B., S. Bharati, S. R. Larter, F. Leistner, R. Littke, H. J. Schenk, and H. Dypvik, 1992, On the atypical petroleum-generating characteristics of alginate in the Cambrian Alum Shale, in M. Schidlowski, S. Golubic, M. M. Kimerly, and P. A. Trudinger, eds., Early organic evolution: Implications for mineral and energy resources: Berlin, Springer-Verlag, p. 257–266.</ref> Compositional yield data derived from immature Alum Shale with an HI of 487 mg HC/g TOC show that strictly primary kerogen and bitumen and/or oil cracking yields about 60% gas, quite unusual for source rocks of comparable HIo values that typically only yield 20 to 30% gas (D. M. Jarvie, unpublished data). Shell Oil Company has now drilled at least two wells into the Alum Shale, but no results are available.

In Sweden and Denmark, the Skegerrak-Kattegat Basin contains the Cambrian–Ordovician Alum Shale, which has also been studied extensively.<ref>Lewan, M. D., and B. Buchardt, 1989, Irradiation of organic matter by uranium decay in the Alum Shale, Sweden: Geochemica et Cosmochimica Acta, v. 53, p. 1307–1322, doi:10.1016/0016-7037(89)90065-3.</ref><ref>Bharati, S., R. L. Patience, S. R. Larter, G. Standen, and I. J. F. Poplett, 1995, Elucidation of the Alum Shale kerogen structure using a multidisciplinary approach: Organic Geochemistry, v. 23, no. 11–12, p. 1043–1058, doi:10.1016/0146-6380(95)00089-5.</ref><ref> Buchardt, B., A. Thorshoj Nielsen, and N. Hemmingsen Schovsbo, 1997, Alun Skiferen i Skandinavien, Dansk Geologisk Forenings Nyheds: OG Informationsskirft, 32 p.</ref>. The Alum Shale is organic rich, with high TOC (11–22%) and HIo, yet generates primarily gas and condensate upon thermal conversion.<ref>Horsfield, B., S. Bharati, S. R. Larter, F. Leistner, R. Littke, H. J. Schenk, and H. Dypvik, 1992, On the atypical petroleum-generating characteristics of alginate in the Cambrian Alum Shale, in M. Schidlowski, S. Golubic, M. M. Kimerly, and P. A. Trudinger, eds., Early organic evolution: Implications for mineral and energy resources: Berlin, Springer-Verlag, p. 257–266.</ref> Compositional yield data derived from immature Alum Shale with an HI of 487 mg HC/g TOC show that strictly primary kerogen and bitumen and/or oil cracking yields about 60% gas, quite unusual for source rocks of comparable HIo values that typically only yield 20 to 30% gas (D. M. Jarvie, unpublished data). Shell Oil Company has now drilled at least two wells into the Alum Shale, but no results are available.

Data from Poland suggest a variety of shale-gas potential in various basins such as the Baltic, Lublin, and Carpathian. Shale-gas resource potential exists in the Silurian Graptolitic Shale. Comparing data from across Poland using two criteria for shale-gas prospectivity, organic richness, and level of conversion, TOCpd values range from 2 to 18%, some with gas window levels of conversion (Figure 8). It is recently announced that the first shale stimulation in Europe has been completed on the 1-Markowolain well in the Lublin Basin. No gas flow data have been reported.

Data from Poland suggest a variety of shale-gas potential in various basins such as the Baltic, Lublin, and Carpathian. Shale-gas resource potential exists in the Silurian Graptolitic Shale. Comparing data from across Poland using two criteria for shale-gas prospectivity, organic richness, and level of conversion, TOCpd values range from 2 to 18%, some with gas window levels of conversion ([[:File:M97FG8.jpg|Figure 8]]). It is recently announced that the first shale stimulation in Europe has been completed on the 1-Markowolain well in the Lublin Basin. No gas flow data have been reported.

Other shale resource systems are being pursued in a variety of other basins in Europe as well. In Switzerland, the deep Vienna Basin will likely be tested for Posidonia Shale gas potential as will the Mikulov Shale in the Molasse Basin. Romania has also been under scrutiny for its shale-gas resource potential, but it may also have some shale-oil resource potential, given the good TOC values with low to modest conversion of organic matter (see Figure 8).

Other shale resource systems are being pursued in a variety of other basins in Europe as well. In Switzerland, the deep Vienna Basin will likely be tested for Posidonia Shale gas potential as will the Mikulov Shale in the Molasse Basin. Romania has also been under scrutiny for its shale-gas resource potential, but it may also have some shale-oil resource potential, given the good TOC values with low to modest conversion of organic matter (see [[:File:M97FG8.jpg|Figure 8]]).

Silurian–Devonian shales show good potential for shale-gas in Algeria and Tunisia (see Figure 8).<ref>Jarvie, D. M., R. J. Hill, R. M. Pollastro, D. A. Wavrek, K. A. Bowker, B. L. Claxton, and M. H. Tobey, 2005b, [http://wwgeochem.com/references/Jarvie-etal2005bcharacterizationofthermogenicgasandoilFtWorthBasinTexasEAGE-Algiers.pdf Characterization of thermogenic gas and oil in the Ft. Worth Basin, Texas]: European Association of Geoscientists and Engineers Meeting, Algiers, Algeria, April 8–10, 2005.</ref> In 2010, it was announced that the first stimulation of a potential shale-gas well was undertaken in the Ghadames Basin, west-central Tunisia, likely in the Silurian Tannezuft Shale.<ref>Oil & Gas Journal, 2010a, [http://www.ogj.com/index/article-tools-template/_printArticle/articles/oil-gas-journal/drilling-production-2/2010/08/north-africa_gets.html North Africa gets first shale gas frac job], August 30, 2010.</ref>

Silurian–Devonian shales show good potential for shale-gas in Algeria and Tunisia (see [[:File:M97FG8.jpg|Figure 8]]).<ref>Jarvie, D. M., R. J. Hill, R. M. Pollastro, D. A. Wavrek, K. A. Bowker, B. L. Claxton, and M. H. Tobey, 2005b, [http://wwgeochem.com/references/Jarvie-etal2005bcharacterizationofthermogenicgasandoilFtWorthBasinTexasEAGE-Algiers.pdf Characterization of thermogenic gas and oil in the Ft. Worth Basin, Texas]: European Association of Geoscientists and Engineers Meeting, Algiers, Algeria, April 8–10, 2005.</ref> In 2010, it was announced that the first stimulation of a potential shale-gas well was undertaken in the Ghadames Basin, west-central Tunisia, likely in the Silurian Tannezuft Shale.<ref>Oil & Gas Journal, 2010a, [http://www.ogj.com/index/article-tools-template/_printArticle/articles/oil-gas-journal/drilling-production-2/2010/08/north-africa_gets.html North Africa gets first shale gas frac job], August 30, 2010.</ref>

In South Africa, the Karoo Basin is being evaluated for its shale-gas potential by various companies<ref>Oil & Gas Journal, 2010b, [http://www.ogj.com/index/article-tools-template.articles.oil-gas-journal.exploration-development-2.2010.07.south-africa_karoo.html South Africa Karoo shale gas hunt growing].</ref> with various conventional and unconventional opportunities.<ref>Raseroka, L., and I. R. McLachlan, 2009, [http://www.searchanddiscovery.net/documents/2009/10196raseroka/index.htm?q=%2Btext%3Araseroka The petroleum potential of South Africa's onshore Karoo basins (abs.)]: AAPG International Conference and Exhibition, Cape Town, South Africa, October 26–29, 2008, Search and Discovery Article 10196, 3 p.</ref>

In South Africa, the Karoo Basin is being evaluated for its shale-gas potential by various companies<ref>Oil & Gas Journal, 2010b, [http://www.ogj.com/index/article-tools-template.articles.oil-gas-journal.exploration-development-2.2010.07.south-africa_karoo.html South Africa Karoo shale gas hunt growing].</ref> with various conventional and unconventional opportunities.<ref>Raseroka, L., and I. R. McLachlan, 2009, [http://www.searchanddiscovery.net/documents/2009/10196raseroka/index.htm?q=%2Btext%3Araseroka The petroleum potential of South Africa's onshore Karoo basins (abs.)]: AAPG International Conference and Exhibition, Cape Town, South Africa, October 26–29, 2008, Search and Discovery Article 10196, 3 p.</ref>

The Oil and Natural Gas Corp. of India (ONGC) is drilling its first shale resource system in the Damodar Basin, with an objective of a Permian shale with a thickness of about 700 m (sim2300 ft) (Natural Gas for Europe, 2010).

The Oil and Natural Gas Corp. of India (ONGC) is drilling its first shale resource system in the Damodar Basin, with an objective of a Permian shale with a thickness of about 700 m (sim2300 ft) (Natural Gas for Europe, 2010).

In Australia, Beach Energy has announced plans to test the Permian section of the Cooper Basin for shale gas. This is likely the Permian Roseneath Shale, which is highly mature in the basin (see Figure 8).

In Australia, Beach Energy has announced plans to test the Permian section of the Cooper Basin for shale gas. This is likely the Permian Roseneath Shale, which is highly mature in the basin (see [[:File:M97FG8.jpg|Figure 8]]).

South America has shale resource activity in Argentina, Uruguay, Brazil, and Colombia, although most are for shale-oil resource systems. In Brazil's Parnaiba Basin, a shale-gas resource has been found in the Devonian Pimenteiras Shale.

South America has shale resource activity in Argentina, Uruguay, Brazil, and Colombia, although most are for shale-oil resource systems. In Brazil's Parnaiba Basin, a shale-gas resource has been found in the Devonian Pimenteiras Shale.