Head of Technical and Scientific Support for R&D at Sonatrach-DC R&D, Algeria
Dr. Said Gaci is an accomplished geophysicist and research leader with extensive expertise in hydrocarbon exploration, signal processing, and petroleum reservoir analysis. Currently serving as the Director of Scientific and Technical Support for R&D at Sonatrach, he has built a distinguished career in Algeria’s energy sector, integrating scientific innovation with operational excellence. Dr. Gaci is renowned for introducing advanced seismic methods and machine learning techniques into geophysical workflows, significantly improving subsurface characterization. His professional footprint includes over two decades of experience, major collaborations with academic and industry partners, and a prolific record of publishing influential books and journal articles in petroleum geoscience.
Profile
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Education
Dr. Gaci holds multiple advanced degrees, reflecting a strong interdisciplinary academic foundation. He received his Engineer diploma in Geophysics in 1997 and a Magister degree in Petroleum Economics and Strategic Management in 2004 from the Algerian Petroleum Institute. Simultaneously, he earned another Magister degree in Geophysics in 2002, followed by a Ph.D. in 2011 from the University of Sciences and Technology Houari Boumediene (USTHB), Algeria. His doctoral work focused on multifractional analysis of geophysical signals, which became foundational to many of his later innovations in reservoir modeling. He also holds a habilitation to supervise research, granted in 2016.
Experience
Dr. Gaci has accumulated over 20 years of professional experience in geophysics and energy research. From 2004 to 2015, he served in multiple technical roles at Sonatrach’s Exploration Division. He later led R&D departments and training divisions at the Algerian Petroleum Institute from 2015 to 2024. Since October 2024, he has headed the scientific and technical support for Sonatrach’s Central R&D Directorate. His portfolio includes supervising multidisciplinary teams on seismic interpretation, economic feasibility, and reservoir analysis. In parallel, he contributed as a part-time lecturer and regularly collaborates with international institutions on energy-related projects and theses.
Research Interest
Dr. Gaci’s research focuses on advanced geophysical signal processing, reservoir characterization, empirical mode decomposition, and machine learning in seismic data analysis. He has introduced multifractional Brownian motion models for interpreting heterogeneities in borehole data and pioneered methods integrating AI with traditional seismic attributes. His work aims to improve fluid detection and lithological segmentation in complex subsurface environments. He continues to explore applications in geothermal energy and carbon storage, using AI and fractal geometry. He has completed multiple international consulting and industry research projects, applying cutting-edge techniques to real-world petroleum challenges.
Awards
Dr. Gaci has gained recognition for his scientific leadership and technical excellence. He serves on editorial boards of reputed journals such as Arabian Journal of Geosciences and Frontiers in Earth Science. He has chaired and co-convened numerous international conferences, including sessions at the EGU General Assembly and AAPG events. Additionally, he was appointed as a university qualification expert by Algeria’s Ministry of Higher Education. His achievements include several awards for research excellence and invited roles in global geoscience forums.
Publications
Dr. Gaci has published over 40 journal articles and authored seven technical books. Selected recent publications include:
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Machine Learning and Seismic Attributes for Petroleum Prospect Generation and Evaluation (2025, Interpretation Journal)
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Petrophysical evaluation using CNNs in Berkine Basin (2024, Journal of Engineering Research)
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Advanced signal and pattern recognition in geosciences (2023, Frontiers in Earth Science)
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A Grey System Approach for Hölderian Regularity Estimation (2021, Fractal and Fractional).
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Investigation of lithological heterogeneities using EMD-Hölder (2022, Journal of Petroleum Science and Engineering)
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Seismic attributes for hydrocarbon detection in Australia (2021, Arabian Journal of Geosciences).
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Spectral and amplitude decomposition for fluid detection (2020, Journal of Seismic Exploration).
These publications demonstrate his high-impact contributions to petroleum geophysics and applied research.
Conclusion
In conclusion, Dr. Said Gaci stands as a leading figure in petroleum geophysics, blending academic rigor with real-world application. His interdisciplinary expertise, from signal theory to economic modeling, has transformed how seismic data are interpreted and utilized for hydrocarbon exploration. With numerous publications, pioneering research, and international collaborations, he continues to push the boundaries of what is technically possible in reservoir characterization.