Sass, I. ; Weinert, S. ; Bär, K. (2017)
Success rates of petroleum and geothermal
wells and their impact on the European
geothermal industry.
In: Swiss Bulletin für angewandte Geologie, 21 (2)
doi: 10.5169/seals-658197
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Geothermal energy, as a renewable resource is already used since more than 2000 years. Hence the rapidly increasing experience with this energy resource, new deep geothermal applications are still under debate in politics and public, especially in European countries. Investments are often missing or investors retract their financial support due to the unsecure political situation. Despite all debates, the quantity of geothermal applications is steadily increasing in e. g. Germany over the last three decades. Taking only German deep geothermal applications into account, a total of 31 systems were running, 34 more were still in the planning phase and a total of 34 were canceled due to various reasons. Of the canceled ones, the majority was shut down for missing investments, uneconomic operation or political reasons. Engineering issues and low discharge only summed up to approx. 21 % of the canceled operations, which leads to the assumption, that neither drilling nor geological exploration and planning is a main failure reason for such projects. Furthermore in this study shows, that the success rate of geothermal drillings is remarkably high and also exceeds success rates published by the petroleum industry. Also, success rate is not bound to the geology of the explored reservoir, nor to the drilling depth needed for exploitation and indeed was improved significantly over the past decades. In fact, most internationally available data for suecess rates are derived from high enthalpy systems, in which geothermal resources are explored more efficiently than for low enthalpy systems e.g. in European countries. By a single deep but slim exploration well prior to any production wells, reservoirs can be investigated and their potential evaluated. Such cheap exploration wells can significantly reduce the project risk due to better understanding of the reservoir and therefore shift main investments to a project phase of significantly lower risk.
Typ des Eintrags: | Artikel | ||||
---|---|---|---|---|---|
Erschienen: | 2017 | ||||
Autor(en): | Sass, I. ; Weinert, S. ; Bär, K. | ||||
Art des Eintrags: | Bibliographie | ||||
Titel: | Success rates of petroleum and geothermal wells and their impact on the European geothermal industry | ||||
Sprache: | Englisch | ||||
Publikationsjahr: | 10 November 2017 | ||||
Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Swiss Bulletin für angewandte Geologie | ||||
Jahrgang/Volume einer Zeitschrift: | 21 | ||||
(Heft-)Nummer: | 2 | ||||
DOI: | 10.5169/seals-658197 | ||||
URL / URN: | http://doi.org/10.5169/seals-658197 | ||||
Kurzbeschreibung (Abstract): | Geothermal energy, as a renewable resource is already used since more than 2000 years. Hence the rapidly increasing experience with this energy resource, new deep geothermal applications are still under debate in politics and public, especially in European countries. Investments are often missing or investors retract their financial support due to the unsecure political situation. Despite all debates, the quantity of geothermal applications is steadily increasing in e. g. Germany over the last three decades. Taking only German deep geothermal applications into account, a total of 31 systems were running, 34 more were still in the planning phase and a total of 34 were canceled due to various reasons. Of the canceled ones, the majority was shut down for missing investments, uneconomic operation or political reasons. Engineering issues and low discharge only summed up to approx. 21 % of the canceled operations, which leads to the assumption, that neither drilling nor geological exploration and planning is a main failure reason for such projects. Furthermore in this study shows, that the success rate of geothermal drillings is remarkably high and also exceeds success rates published by the petroleum industry. Also, success rate is not bound to the geology of the explored reservoir, nor to the drilling depth needed for exploitation and indeed was improved significantly over the past decades. In fact, most internationally available data for suecess rates are derived from high enthalpy systems, in which geothermal resources are explored more efficiently than for low enthalpy systems e.g. in European countries. By a single deep but slim exploration well prior to any production wells, reservoirs can be investigated and their potential evaluated. Such cheap exploration wells can significantly reduce the project risk due to better understanding of the reservoir and therefore shift main investments to a project phase of significantly lower risk. |
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Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Geowissenschaften > Fachgebiet Angewandte Geothermie 11 Fachbereich Material- und Geowissenschaften > Geowissenschaften 11 Fachbereich Material- und Geowissenschaften |
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Hinterlegungsdatum: | 13 Nov 2017 07:40 | ||||
Letzte Änderung: | 13 Nov 2017 07:40 | ||||
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