Gas Geochemistry of the Dogger Geothermal Aquifer (Paris Basin, France)
The low enthalpy program developed in the Paris Basin provides the opportunity for studying the gas geochemistry of the calcareous aquifer of the Dogger. Hydrocarbons and CO{sub 2} are mainly biogenic, He displays high concentrations. He, Ar and N{sub 2} have multiple origins (radioactive decay, atmospheric migration, biochemical processes). The distribution of the gases in the zones of the basin varies in relation to the general chemistry, sedimentology and hydrodynamics. The gas geothermometers do not apply to this environment but useful estimations of the redox potential of the fluid can be derived from CO{sub 2}/CH{sub 4} and N{sub 2}/NH{sub 4}{sup +} ratios. H{sub 2} and H{sub 2}S are involved in corrosion processes and scaling in the pipes. 12 refs., 3 figs., 2 tabs.
- Research Organization:
- Institut Mixte de Recherches Geothermiques (BRGM-AFME), Cedex, France; M.A.G.I.E., Universite Paris VI, Paris Cedex 05, France; Ecole des Mines, Fontainbleu, France
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AT03-80SF11459; AS07-84ID12529
- OSTI ID:
- 888646
- Report Number(s):
- SGP-TR-109-47
- Resource Relation:
- Conference: Proceedings, Twelfth Workshop on Geothermal Reservoir Engineering, Stanford University, Stanford, Calif., January 20-22, 1987
- Country of Publication:
- United States
- Language:
- English
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