Wyniki wyszukiwania - BazTech

1

High potential geothermal areas within the Rahat volcanic field, Saudi Arabia, from gravity data and 3D geological modeling

Aboud Essam, Abraham Ema, Alqahtani Faisal, Abdulfarraj Murad

Acta Geophysica

|

2024

|

Vol. 72, no. 3

1713--1729

EN

We present various geological models to examine the geothermal energy potential at the Rahat volcanic field, Saudi Arabia. The method involves the application of geophysical techniques of gravity and seismic tomography results to derive a 3D subsurface geological structure representing possible subsurface structural information beneath the northern Rahat volcanic field. Results show a secluded subsurface structure within the basement crust with low densities (< 2500 kg/m3) and a slightly high P-wave velocity, enclosed by a high density (> 2800kg/m3) and low P-wave velocity structure. Identified secluded subsurface structure could depict a magma intrusion within the basement and its depth proximity to the basalt deposition in the region signals the viability of this location for geothermal exploration. Deductions also show that the geothermal reservoir could be reached at starting depths of ~ 1.3 km, whereas its effect could be accessed at depths < 1 km. Within the geothermal active region of northern Harrat Rahat, this study has suggested possible locations with high potential for further geothermal exploration.

2

Evaluation of undeveloped hard coal deposits and estimation of hard coal reserves in the Upper Silesian Coal Basin, Poland

Urych Tomasz, Chećko Jarosław, Rosa Marek, Wątor Anna

Journal of Sustainable Mining

|

2020

|

Vol. 19, iss. 4

230--242

EN

The article presents the results of works concerning evaluation of undeveloped deposits in the Upper Silesian Coal Basin and an estimation of hard coal reserves which can be developed by 2050. Evaluation of hard coal deposits was established on criterions choice and their score determination. On the basis of obtained the final score and after consultations with experts in the field of hard coal mining, there were selected three areas of undeveloped deposits with the amount of about 1.99 Gt (billion metric tons) of anticipated economic resources which can extend the coal reserve base located in the direct vicinity of operating hard coal mines. Additionally, one undeveloped coal deposit with estimated resources amounts to about 1.15 Gt was selected as a potential deposit whose resources could be included in the reserves of operating mines, up to the depth of 1,500 metres. Deposit areas were selected and hard coal reserves were estimated with a view to building new coal mines. For Oświęcim-Polanka deposit, there was built a 3D geological model with estimated the amount of 924 Mt (million metric tons) of anticipated economic resources of coal. An example of a deposit development with ventilation, extraction and transport/haulage underground roadways connecting coal seams with the surface are presented. The designed mine working was placed in the 3D geological deposit model which is a useful tool for designing spatial deposit management.

3

Study of Shallow Low-Enthalpy Geothermal Resources Using Integrated Geophysical Methods

De Giorgi L., Leucci G.

Acta Geophysica

|

2015

|

Vol. 63, no. 1

125--153

EN

The paper is focused on low enthalpy geothermal exploration performed in south Italy and provides an integrated presentation of geological, hydrogeological, and geophysical surveys carried out in the area of municipality of Lecce. Geological and hydrogeological models were performed using the stratigraphical data from 51 wells. A ground-water flow (direction and velocity) model was obtained. Using the same wells data, the ground-water annual temperature was modeled. Furthermore, the ground surface temperature records from ten meteorological stations were studied. This allowed us to obtain a model related to the variations of the temperature at different depths in the subsoil. Integrated geophysical surveys were carried out in order to explore the low-enthalpy geothermal fluids and to evaluate the results of the model. Electrical resistivity tomography (ERT) and self-potential (SP) methods were used. The results obtained upon integrating the geophysical data with the models show a low-enthalpy geothermal resource constituted by a shallow ground-water system.

4

Kartografia wgłębna i modelowanie w Holandii : automatyzacja procesu, konwersja czasowo-głębokościowa i modelowanie uskoków

Dulk, den M., Doornenbal J. C.

Przegląd Geologiczny

|

2014

|

Vol. 62, nr 12

812–-817

EN

A comprehensive 3D model has been developed for the Dutch on- and offshore. This model consists of a detailed 3D structural framework of the deep subsurface including 10 major units from the Late Permian Upper Rotliegend Group up to the Neogene Upper North Sea Group. This overview presents the workflow for building the detailed structural model including the time-to-depth conversion and the assessment of uncertainties.

5

Budowa cyfrowego modelu geologicznego dla Wielkiej Brytanii

Mathers S.

Przegląd Geologiczny

|

2014

|

Vol. 62, nr 12

807–-811

EN

BGS has recently stopped its' systematic surveying and litho-printed geological map production. Instead we are undertaking integrated responsive mapping and 3D modelling in user-defined target areas using all available geospatial data (maps, boreholes, geophysics) assessed in a single workspace. The output will be 3D geological framework models that capture the understanding and interpretation of the survey geologist. These 3D geological maps (framework models) are used for both visualisation and analysis to enable management of the subsurface. Downstream the models can be populated with properties for process modelling. These models enhance corporate datasets and can be further edited, what would then result in newer improved versions being returned to the object store.

6

Zintegrowany System Informacji Przestrzennej o Środowisku (SIPoŚ)

Nowacki Ł., Chełmiński J., Kocyła J., Szynkaruk E., Tomaszczyk M.

Przegląd Geologiczny

|

2009

|

Vol. 57, nr 2

158-158

EN

The main aim of the Environmental Spatial Information System (ESIS) project was to design a methodology for creation of a detailed Digital 3D Model of geological structure, comprising infrastructure data, land use and environmental information and usable for local administration units of the county (poviat) and commune level. The 3D geological model shows geology down to 30 m below ground level, that is in zone important for land use planning due to the impact of the existing and future surface infrastructure. Integrated Environmental Spatial Information System has been designed to facilitate decision-making processes, assessing resources of common mineral deposits, monitoring natural resources and geohazards predictions.