Geohazard research, modeling, and assessment for disaster risk reduction

Ismail‐Zadeh, Alik

doi:10.2205/2016es000572

Cited by 7 publications

(4 citation statements)

References 28 publications

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“…Some of them are well known due to their great destructive power. These include earthquakes, volcanoes, landslides, and associated tsunamis (Ismail-Zadeh, 2016). Others generally do not cause direct damage to societies but can affect engineering structures.…”

Section: Introductionmentioning

confidence: 99%

Maximising offset well information in unravelling onshore geohazards indicators: Case study of the Gale field

Umunna,

Amakiri,

Tamunobereton-Ari

et al. 2023

wojast

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An attempt is made in this study towards maximising offset wells information in unravelling onshore geohazards indicators in the Gale field. The Gale field is located about 100km north-west of Port Harcourt, Nigeria. The field consists of a highly faulted and elongated rollover anticline, bounded to the north by a regional growth fault. The data used for this study integrates the quadrature and reflectivity amplitude attributes from seismic data, with offset well data. The conventional reflectivity seismic data was 90° phase rotated to derive the quadrature volume. The quadrature seismic was considered a more appropriate reflectivity seismic attribute for use in shallow geohazard analysis as it is known for its characteristic preservation of high frequency spectrum inherent in the data. Offset wells (GALE-01, GALE-03, GALE-04, GALE-05, GALE-06, and GALE-08) analysis revealed mud losses, stuck pipe, overpull and gas cut as gathered from the daily drilling reports. These could translate to potential triggers of some geohazards where poorly managed. Review of field geotechnical report did not reveal any geohazards issues. Based on the geohazards assessment carried out for these wells; chances of encountering shallow gas for all the units as shown in the well summary is rated low. Results from a geohazards analysis indicate the presence of possible shallow gas within the area of interest and particularly along the shallow section of planned well trajectory. This is further supported by the presence of faults within the vicinity of gas bearing reservoirs at deeper level and a potential for these faults extending to the shallower interval. These faults are likely to serve as migration pathways for gas to seep to the shallower section, hence forming a potential geohazard. In addition, some of the offset wells targeting deeper gas reservoirs penetrated pockets of gas at the shallower interval that stratigraphically correlates with the shallow section that would be penetrated by the planned wells. The results of this work were used to move the proposed drilling location of the Gale planned wells to a nearby area free of shallow gas signatures.

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Section: Introductionmentioning

confidence: 99%

Maximising offset well information in unravelling onshore geohazards indicators: Case study of the Gale field

Umunna,

Amakiri,

Tamunobereton-Ari

et al. 2023

wojast

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“…Seismic observations are included in geodynamic monitoring at foreign UGS [Scala et al, 2022], in Russia there are proposals to supplement traditional geodynamic monitoring for UGS with observations of seismicity [Nikonov, 2003], but so far this issue is under discussion and no evidence of technogenic seismicity during the operation of UGS in Russia has been cited. It is suggested that for a more complete account of geological hazards, it is necessary to take into account registered, historical and simulated earthquakes [Ismail-Zadeh, 2016]. Based on the analysis of the situation on Russian UGSs, the authors of this article believe that the manifestation of technogenic seismicity during their operation becomes a new reality that must be taken into account to ensure industrial and environmental safety.…”

Section: Introductionmentioning

confidence: 99%

Exploring the Nature of Seismic Events in the Underground Gas Storages Area of the Volga Federal District

Batugin

Ogadzhanov

Han

et al. 2022

Russian Journal of Earth Sciences

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Seismicity during UGS operation had not yet been known in Russia. This work presents studies on the manifestation of seismicity in the area of three underground gas storages (UGSs) located in the south-eastern part of the East European Platform (European part of Russia). The tectonic structure of this region, geodynamic conditions and technological characteristics of «Vostochnoye», «Zapadnoye», «Uzhnoye» UGS are presented. An analysis of the situation with the manifestation of seismicity allows us to conclude that it is technogenic in nature, a feature not previously noted on Russian UGSs. There is a wide list of signs indicating the relationship between the mode of operation of UGSs and the nature of seismicity: prior to the start of UGS operation technogenic seismicity in this area was not known; there is a clear correlation between UGS operation and seismicity; the epicenters of seismic phenomena are located in the geodynamic influence zone of the UGS; in the region there are Earth crustal faults that experienced activation in late Cenozoic time and respond to strong earthquakes of neighboring tectonic areas, which consequently indicates their predisposition to reactivation; the change in pressure in the UGS reservoir is sufficient to induce seismicity. The phenomenon of increasing seismic activity during the gas extraction period is noted, which is explained by the effect of softening of the containing massif and its subsequent push-like deformation when the gas pressure in the reservoir is reduced. Despite the weak seismicity, which does not pose a threat to UGS facilities and adjacent territories, it is proposed to include seismic observations in the complex geodynamic monitoring at Russian UGS to establish patterns over a long period of time.

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“…Some of them are well known due to their great destructive power. These include earthquakes, volcanoes, landslides, and associated tsunamis [5]. Others generally do not cause direct damage to societies but can affect engineered structures.…”

Section: Introductionmentioning

confidence: 99%

Marine Geohazards: A Bibliometric-Based Review

et al. 2019

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Marine geohazard research has developed during recent decades, as human activities intensified towards deeper waters. Some recent disastrous events (e.g., the 2004 Indian Ocean and 2011 Japan tsunamis) highlighted geohazards socioeconomic impacts. Marine geohazards encompass an extensive list of features, processes, and events related to Marine Geology. In the scientific literature there are few systematic reviews concerning all of them. Using the search string ‘geohazard*’, this bibliometric-based review explored the scientific databases Web of Science and Scopus to analyze the evolution of peer-reviewed scientific publications and discuss trends and future challenges. The results revealed qualitative and quantitative aspects of 183 publications and indicated 12 categories of hazards, the categories more studied and the scientific advances. Interdisciplinary surveys focusing on the mapping and dating of past events, and the determination of triggers, frequencies, and current perspectives of occurrence (risk) are still scarce. Throughout the upcoming decade, the expansion and improvement of seafloor observatories’ networks, early warning systems, and mitigation plans are the main challenges. Hazardous marine geological events may occur at any time and the scientific community, marine industry, and governmental agencies must cooperate to better understand and monitor the processes involved in order to mitigate the resulting unpredictable damages.

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Geohazard research, modeling, and assessment for disaster risk reduction

Cited by 7 publications

References 28 publications

Maximising offset well information in unravelling onshore geohazards indicators: Case study of the Gale field

Maximising offset well information in unravelling onshore geohazards indicators: Case study of the Gale field

Exploring the Nature of Seismic Events in the Underground Gas Storages Area of the Volga Federal District

Marine Geohazards: A Bibliometric-Based Review

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