Description: Das Projekt "Einsatz geothermaler Energie in der Fernwaermeversorgung - Elektrizitaetserzeugung - Stufe 1" wird vom Umweltbundesamt gefördert und von Energie- und Wasserversorgung Bruchsal GmbH durchgeführt. Objective: To tap a Bunter formation to supply heat to a sports centre, industrial buildings and housing. Expected characteristics of sandstone reservoir; depth: 2000-2500; flow-rate: 20-40 m3/h; temperature: 85-100 C; TDS: 70 G/l. Tests on superjacent Muschelkalk are to be carried out during drilling. Geothermal water will be exploited in cascade: first stage will bring temperature down from 100 to 70 C with pre-heating and vapourization for an organic rankine cycle to feed an isobutane steam turbine. To generate electricity, second stage will recover the water at 70 C for heating purposes and used in a bid to overcome deposit and corrosion problems. Profitability threshold is estimated to be 0.51 DM/L for fuel oil. Expected annual energy substitution is 6,000 MWh. General Information: This is a continuation of the Bruchsal project already supported by EEC contract DG XII A2 060. Directional well Bruchsal 1 drilled down to a final depth of 1,932 m between August and November 1983. Many difficulties were encountered: first side track at 1,274 m, technical casing 9' 5/8 to be cemented at 608 m, several faults drilled through mud losses at 1,735 m. Final well is cased in 7' liner cemented from the bottom to 1,877 m and hung from 1,573 m. Production levels are located in variegated sandstone formations. In December 1983, a pumping test of 5 days with a delivery rate of 10 m3/h indicated a transmissivity of 10 to 20 DM and a positive skin effects of 10. Water temperature is 97 C, TDS over 124 G/l, main production zone (80 per cent) is assumed by the lower levels. (1,853 m). Hydrogeological calculations prove a technical yield of the well may amount to 15 - 20 l/s. A second well had to be drilled for injection purposes due to high salinity and to prevent pressure drop in the reservoir. Achievements: The well Bruchsal 1 is located on a line parallel to the valley edge of the upper Rhine Valley and develop the geothermal waters of Permian and variegated Triassic sandstones. The well had crossed a faulty zone. The extracted brine is strongly mineralized with heavy metals and shows precipitations of ferrous hydroxide and MnO2 when oxygen added from the air. The main gas dissolved in water is carbon dioxide whose partial pressure is 12-15 bars in the reservoir. Isotopic analysis (14 C, 13 C, 3 H) shows that geothermal water has no connection with the current surface water cycle (precipitation).
Types:
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Butan ? Kraftstoff ? Schwermetallgehalt ? Industriegebäude ? Eisenhydroxid ? Hydroxid ? Manganverbindung ? Schluckbrunnen ? Europäische Kommission ? Geothermie ? Sauerstoff ? Sportanlage ? Temperaturverteilung ? Wärmeversorgung ? Wasserlöslichkeit ? Wassertemperatur ? Schwermetall ? Wohngebäude ? Contracting ? Bundesrepublik Deutschland ? Main ? Oberflächenwasser ? Futtermittel ? Gewässersediment ? Heizöl ? Hydrogeologie ? Isotopentechnik ? Kohlendioxid ? Betriebswasser ? ORC-Prozess ? Chemische Zusammensetzung ? Dampfturbine ? Alternative Energie ? Wärmeerzeugung ? Stromerzeugung ? Korrosion ? Energieträger ? Sandstein ? Extraktion ? Salzgehalt ? Fällungsreaktion ? Forschungsförderung ? Industrieanlage ? Isomer ? Kapselung ? Haut ? Umweltfreundliches Produkt ? Vertrag ? Kreislaufsystem ? Wasserkreislauf ? Energie ? Wasserspeicher ? Energiegewinnung ? Wirkungsgrad ? Wirtschaftlichkeit ? Mineralisation ? Analyseverfahren ? Oberflächengewässer ? Partialdruck ? Probebohrung ? Wasserversorgung ? Heizung ? Wohnen ? Anlagenbau ? Gewässer ? Bohrung ? Wasserstand ? Tal ? Niederschlag ? Gasspeicher ? Versuchsanlage ? Schwellenwert ? Rhein ? Turbomaschine ? Kaskade [Verfahrenstechnik] ? Vorwärmung ? Verdampfung ?
Region: Baden-Württemberg
Bounding box: 9° .. 9° x 48.5° .. 48.5°
License: cc-by-nc-nd/4.0
Language: Deutsch
Time ranges: 1983-08-09 - 1988-12-19
Accessed 1 times.