مجله ژئوفیزیک ایران

مجله ژئوفیزیک ایران

Upveiling subsurface structures of the Sarulla geothermal field of north Sumatera through satellite -based gravity modeling

نوع مقاله : مقاله پژوهشی‌

نویسندگان
1 Assistant Professor, Limnology and Water Resource Research Centre, National Research and Innovation Agency (BRIN), Indonesia
2 Assistant Professor, Faculty Of Mathematics And Natural Sciences Jenderal Soedirman University, Indonesia
چکیده
This study presents a comprehensive analysis of the subsurface geological structures of the Sarulla geothermal field located in North Sumatera, Indonesia, utilizing satellite-based gravity modelling techniques. The aim of this study were to: a) Identify the presence and characteristics of fault structures in the Sarulla Geothermal Field using gravity derivative analysis; b). Interpret the subsurface lithology of the geothermal system through 2D forward gravity modelling; c). Evaluate the geothermal resource potential. Employing high-resolution satellite gravity data from the GGMplus model, gravity anomaly maps were generated and interpreted through advanced modeling approaches to identify density variations indicative of subsurface features such as faults, fractures, and lithological boundaries. The methodology integrates satellite gravity data processing, anomaly separation, and forward and inverse gravity modelling to construct a detailed subsurface structural model. Key findings reveal significant gravity anomalies correlating with major tectonic structures and geothermal reservoirs, highlighting zones of enhanced permeability and heat flow. These results provide critical insights into the spatial distribution of geothermal reservoirs and the structural controls influencing fluid migration and heat accumulation. The study underscores the effectiveness of satellite gravity modelling as a non- invasive, cost-efficient tool for geothermal exploration, particularly in regions with limited ground-based geophysical data. The implications of this research extend to optimizing drilling targets, reducing exploration risks, and supporting sustainable geothermal development in the Sarulla field and similar geothermal systems worldwide. This work contributes to the growing body of knowledge on remote sensing applications in geothermal resource assessment and demonstrates the potential of integrating satellite gravity data with geological and geophysical information for enhanced subsurface characterization.
کلیدواژه‌ها

موضوعات


عنوان مقاله English

Upveiling subsurface structures of the Sarulla geothermal field of north Sumatera through satellite -based gravity modeling

نویسندگان English

Turmudi Turmudi 1
Agustya Martha 1
Rizki Wijayanti 2
1 Assistant Professor, Limnology and Water Resource Research Centre, National Research and Innovation Agency (BRIN), Indonesia
2 Assistant Professor, Faculty Of Mathematics And Natural Sciences Jenderal Soedirman University, Indonesia
چکیده English

This study presents a comprehensive analysis of the subsurface geological structures of the Sarulla geothermal field located in North Sumatera, Indonesia, utilizing satellite-based gravity modelling techniques. The aim of this study were to: a) Identify the presence and characteristics of fault structures in the Sarulla Geothermal Field using gravity derivative analysis; b). Interpret the subsurface lithology of the geothermal system through 2D forward gravity modelling; c). Evaluate the geothermal resource potential. Employing high-resolution satellite gravity data from the GGMplus model, gravity anomaly maps were generated and interpreted through advanced modeling approaches to identify density variations indicative of subsurface features such as faults, fractures, and lithological boundaries. The methodology integrates satellite gravity data processing, anomaly separation, and forward and inverse gravity modelling to construct a detailed subsurface structural model. Key findings reveal significant gravity anomalies correlating with major tectonic structures and geothermal reservoirs, highlighting zones of enhanced permeability and heat flow. These results provide critical insights into the spatial distribution of geothermal reservoirs and the structural controls influencing fluid migration and heat accumulation. The study underscores the effectiveness of satellite gravity modelling as a non- invasive, cost-efficient tool for geothermal exploration, particularly in regions with limited ground-based geophysical data. The implications of this research extend to optimizing drilling targets, reducing exploration risks, and supporting sustainable geothermal development in the Sarulla field and similar geothermal systems worldwide. This work contributes to the growing body of knowledge on remote sensing applications in geothermal resource assessment and demonstrates the potential of integrating satellite gravity data with geological and geophysical information for enhanced subsurface characterization.

کلیدواژه‌ها English

Satellite gravity modelling, Sarulla geothermal system, gravity derivative analysis, subsurface structure interpretation, geothermal exploration
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