Hydrogeochemistry and geothermal potential of thermal waters: case study of the Triassic diapir area in Northeastern Algeria

There are numerous oil fields that are approaching the end of their lifetime and that have great geothermal potential considering temperature and water cut. On the other hand, the oil industry is facing challenges due to increasingly stringent environmental regulations. An example of this is the case of France where oil extraction will be forbidden starting from the year 2035. Therefore, some oil companies are considering switching from the oil business to investing in geothermal projects conducted on existing oil wells. The proposed methodology and developed conversions present the evaluation of existing geothermal potentials for each oil field in terms of water temperature and flow rate. An additional important aspect is also the spatial distribution of existing oil wells related to the specific oil field. This paper proposes a two-stage clustering approach for grouping similar wells in terms of their temperature properties. Once grouped on a temperature basis, these clusters should be clustered once more with respect to their spatial arrangement in order to optimize the location of production facilities. The outputs regarding production quantities and economic and environmental aspects will provide insight into the optimal scenario for oil-to-water conversion. The scenarios differ in terms of produced energy and technology used. A case study has been developed where the comparison of overall fields and clustered fields is shown, together with the formed scenarios that can further determine the possible conversion of petroleum assets to a geothermal assets.

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Reservoir Temperature Estimation By Using Geothermometry (Case Study on Geothermal Field Jaboi, Sabang)

Journal of Aceh Physics Society ◽

10.24815/jacps.v8i1.12992 ◽

2019 ◽

Vol 8 (1) ◽

pp. 30-34

Author(s):

Eliyani Eliyani ◽

Muhammad Isa ◽

Khairi Khairi ◽

Muhammad Rusdi

Keyword(s):

Hot Springs ◽

Geothermal Field ◽

Energy Potential ◽

Temperature Estimation ◽

Mineral Characteristics ◽

Geothermal Fluids ◽

Geothermal Potential ◽

Geochemical Studies

Gunung api Leumo Matee dan Seumeuregoh, Jaboi Sabang memiliki potensi energi panas bumi sangat besar. Hal ini ditandai dengan adanya manifestasi yang muncul di permukaan seperti uap panas, fumarol dan sumber air panas. Oleh karena itu, perlu dikaji lebih dalam dan menyeluruh untuk mendapatkan informasi yang detail, terutama parameter suhu dan karakteristik batuan/mineral. Sebuah penelitian telah dilakukan untuk kajian geokimia terutama analisis kimia fluida panas bumi. Pendekatan untuk menentukan karakteristik fluida kimia panas bumi dilakukan dengan metode geotermometer untuk mengukur kandungan air (SiO2) dan gas (Na-K) serta konsentrasi anion dan kation. Berdasarkan data pengamatan lapangan dan hasil uji laboratorium yang sudah terstandarisasi menunjukkan bahwa suhu bawah permukaan untuk fluida cair adalah 228oC dan untuk gas sebesar 220oC. Hasil pengujian sampel fluida panas bumi menunjukkan bahwa manifestasi panas bumi Kawah I dan Kawah IV daerah Jaboi, Sabang sangat prospek untuk dikembangkan. Informasi fluida ini menjadi salah satu parameter dalam pengembangan potensi panas bumi. Oleh karena itu sangat penting ditindaklanjuti karena dapat menjawab kebutuhan energi yang ramah lingkungan dan energi terbarukan. The Volcano Leumo Matee and Seumeuregoh, Jaboi Sabang have enormous geothermal energy potential. This is characterized by the presence of surface manifestations such as hot steam, fumaroles and hot springs. Therefore, it needs to be studied more deeply and thoroughly to obtain detailed information, especially the temperature and rock/mineral characteristics. A study has been carried out for geochemical studies, especially chemical analysis of geothermal fluids. The approach to determine the characteristics of the geothermal chemical fluid is carried out by geothermometry to measure the water content (SiO2) and gas (Na-K) as well as the concentration of anions and cations. Based on field observations and standardized laboratory tests, the subsurface temperature for liquid fluids is 228oC and for gases of 220oC. The results of testing geothermal fluid samples show that the geothermal manifestations of Kawah I and Kawah IV Jaboi, Sabang are very prospects to be developed. This fluid information is one of the parameters in developing geothermal potential. Therefore, it is very important to follow up because it can answer the needs of environmentally friendly energy and renewable energy. Keywords: Volcano, Geothrmometry, jaboi, Sabang, Temperature

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Geothermal potential, chemical characteristic and utilization of groundwater in Serbia

10.21203/rs.3.rs-185122/v1 ◽

2021 ◽

Author(s):

Tanja Petrović Pantić ◽

Katarina Atanasković Samolov ◽

Jana Štrbački ◽

Milan Tomić

Keyword(s):

Geothermal Energy ◽

Thermal Water ◽

Pannonian Basin ◽

Local Population ◽

Hydrochemical Facies ◽

Energy Utilization ◽

Thermal Waters ◽

Groundwater Temperature ◽

Geothermal Resources ◽

Geothermal Potential

Abstract In order to collect and unify data about all geothermal resources in Serbia, a database is formed. The database allows us to perceive the geothermal resources of Serbia and their potential for utilization. Based on the data available in the geothermal database, the estimated temperatures of reservoirs, heat power, and geothermal energy utilization were calculated. The database contains 293 objects (springs, boreholes) registered at 160 locations with groundwater temperature in the range between 20°C and 111°C. The maximum expected temperature of the reservoir is 146°C (according to the SiO2 geothermometer). Some thermal water is cooled while mixed with cold, shallow water. Geothermal resources are mostly used for balneology and recreation, and less for heating, water supply, bottling, fish and animal farms, agriculture, and technical water. 26% of all geothermal resources is used by the local population or has not been used at all. The annual utilization of geothermal energy for direct heat is 1507 TJ/yr, and the estimated capacity of geothermal energy in Serbia is 111 MWt. The results of analytical work were presented in the form of maps with a geological and hydrogeological background. Thermal waters are mostly registrated in the area of Tertiary magmatism. The three geothermal potential areas are identified: Pannonian basin-Vojvodina Province, Mačva-Srem and area from Jošanička Banja to Vranjska Banja (southern Serbia). Based on chemical analyses, four hydrochemical facies are distinguished. Thermal water mainly belongs to NaHCO3 or CaMgHCO3 hydrochemical facies, usually depending on the primary aquifer: karst, karst-fissured, intergranular or fissured.

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TECHNIQUE FOR CONSTRUCTING A 3D MODEL OF THE GEOTHERMAL POTENTIAL BY THE RESULTS OF GEOPHYSICAL DATA ON THE EXAMPLE OF THE SAMUKH OIL AND GAS-BEARING AREA OF THE LOWER KURINSKY DEPRESSION

ETM Equipment, Technologies, Materials ◽

10.36962/etm0703202116 ◽

2021 ◽

Vol 07 (03) ◽

pp. 16-21

Author(s):

Rasim Nəcəfov Rasim Nəcəfov

Keyword(s):

Temperature Gradient ◽

3D Model ◽

Oil And Gas ◽

Heat Pumps ◽

Earth’S Crust ◽

Thermal Waters ◽

Steam Turbines ◽

The Earth ◽

Geothermal Potential ◽

Earth's Crust

It is known that in the center of the Earth the temperature is about 5000 0C and in the direction of the earth's crust it decreases. It is also known that the temperature gradient of the Earth is 3 0C every 100 meters in depth and it is constant throughout the planet. Consequently, the temperature of the Earth's crust is the most beneficial source of heat and energy. It accumulates the energy of the sun and is heated by the focal temperature. In Azerbaijan, at a depth of one meter to 50 meters, the temperature is stable and equal to 5-8 ° C. Keywords: geothermal energy, Earth's crust temperature, temperature gradient, thermal waters, steam turbines and heat pumps, 3D model of the field.

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The geothermal potential of sedimentary basins – case study for Berlin, Germany

10.5194/egusphere-egu2020-19662 ◽

2020 ◽

Author(s):

Judith Bott ◽

Maximilian Frick ◽

Nora Koltzer ◽

Mauro Cacace ◽

Björn Lewerenz ◽

...

Keyword(s):

Temperature Distribution ◽

Complex Geometry ◽

Sedimentary Basins ◽

Transport Processes ◽

Heating Power ◽

Capital City ◽

Sedimentary Deposits ◽

Geothermal Potential ◽

Wide Range

In this case study a method to estimate the geothermal potential is presented for the capital city of Berlin, Germany. Therefore, it is essential to know the temperature distribution in the subsurface which has been studied intensively in the past. Building on this knowledge, newly available subsurface temperature predictions have been used along with updated geometries and geophysical properties as input data for the application case of hydrothermal doublets and their comparison to earlier realizations. This shows how considering more complex geometries, boundary conditions and processes in numerical 3D thermohydraulic simulations leads to significant changes in the predicted geothermal potential and the associated controlling factors. The model area is part of the Northeast German Basin which consists of a thick sequence (up to 10 km) of differently consolidated sedimentary deposits. This sequence is made up of alternating aquifers and aquitards, wherein several encompass promising targets for different geothermal application scenarios. Namely these include the Jurassic, Middle Buntsandstein and the Sedimentary Rotliegend aquifers. The former two of these reservoirs depict a complex geometry (mainly due to deeper salt movements) leading to a wide range of predicted temperatures, while the latter (situated below the salt) has a more homogenous topography and temperature distribution. This is also connected to the efficacy of different heat transport processes at different depths. The predicted heating power is therefore also distributed heterogeneously and reaches maxima as large as 1.25 MWth for the Jurassic, 10 MWth for the Middle Buntsandstein and 2.2 MWth for the Sedimentary Rotliegend. The models further show that the geothermal potential (or the heating power) of a hydrothermal doublet is controlled by more than merely the reservoir temperature but also the producible mass flux, which in turn depends highly on the reservoir transmissivity. Due to the high variability of predicted geothermal potentials, different utilization scenarios should be investigated in future studies, such as aquifer thermal energy storage or low enthalpy geothermal utilizations.

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