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Hydrogeochemical Modelling to Monitor Scaling and Corrosion during Geothermal Energy Production

Suitability and potential benefit of using hydrogeochemical modelling to monitor scaling and corrosion during geothermal exploration and production in the high-salinity geothermal area of the North German Basin was explored.

Product Number: 51317--9044-SG
ISBN: 9044 2017 CP
Author: Helmuth Sarmiento Klapper
Publication Date: 2017
Industry: Energy Generation
$0.00
$20.00
$20.00

Deep formation waters with high salinity and temperature used for geothermal energy production generally induce corrosion and scaling. Therefore tailored material selection and costly chemical treatments are necessary to mitigate these. Technical facilities are adversely affected by corrosion and/or scaling which significantly reduce their efficiency resulting in profitability loss of the project. While monitoring corrosion and scaling directly in technical facilities increases their reliability and enables a more cost-effective use of chemical treatments current commercially available monitoring systems are limited in terms of temperature and pressure. Hydrogeochemical modelling can help to predict chemical reactions due to interactions between the formation fluid the structural materials in downhole equipment and pumped fluids such as drilling and stimulation fluids. When combined with chemical monitoring of drilling and production fluids hydrogeochemical modelling can also be used to monitor corrosion and early detection of integrity problems in downhole equipment. To show the suitability and potential benefit of hydrogeochemical modelling to monitor scaling and corrosion during geothermal exploration and production the interaction between formation fluids from the high-salinity geothermal area of the North German Basin and structural materials in several wells was modelled and compared with practical experience.

Key words: Hydrogeochemical modelling, Geothermal, Scaling, Corrosion

Deep formation waters with high salinity and temperature used for geothermal energy production generally induce corrosion and scaling. Therefore tailored material selection and costly chemical treatments are necessary to mitigate these. Technical facilities are adversely affected by corrosion and/or scaling which significantly reduce their efficiency resulting in profitability loss of the project. While monitoring corrosion and scaling directly in technical facilities increases their reliability and enables a more cost-effective use of chemical treatments current commercially available monitoring systems are limited in terms of temperature and pressure. Hydrogeochemical modelling can help to predict chemical reactions due to interactions between the formation fluid the structural materials in downhole equipment and pumped fluids such as drilling and stimulation fluids. When combined with chemical monitoring of drilling and production fluids hydrogeochemical modelling can also be used to monitor corrosion and early detection of integrity problems in downhole equipment. To show the suitability and potential benefit of hydrogeochemical modelling to monitor scaling and corrosion during geothermal exploration and production the interaction between formation fluids from the high-salinity geothermal area of the North German Basin and structural materials in several wells was modelled and compared with practical experience.

Key words: Hydrogeochemical modelling, Geothermal, Scaling, Corrosion

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