Broadband seismic data acquisition using an E-vib source for enhanced imaging of iron-oxide deposits, Sweden

Pertuz, Tatiana; Malehmir, Alireza; Brodic, Bojan; Bäckström, Emma; Marsden, P.; Kunder, Richard de; Bos, Jordan

doi:10.1190/segam2020-3422551.1

Cited by 2 publications

(2 citation statements)

References 15 publications

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“…In addition to the base plate, reaction mass, and LSMs, the unit also contained an air spring and a few leaf springs. The performance of an upgraded 7 kN version of the prototype weighing 1.65 tonne was recently used to obtain enhanced imaging of an iron-oxide deposits in Sweden [11]. Compared to the microspread seismic profile, the E-vib data have shown double the vertical resolution with similar penetration depth.…”

Section: Seismic Monitoring Technologies Used In the Projectmentioning

confidence: 99%

SUCCEED: A CO2 storage and utilisation project aimed at mitigating against greenhouse gas emissions from geothermal power production

Durucan

Korre

Parlaktuna³

et al. 2021

SSRN Journal

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The non-condensable gases in most geothermal resources include CO2 and smaller amounts of other gases. Currently, the worldwide geothermal power is a small sector within the energy industry, and CO2 emissions related to the utilisation of geothermal resources are consequently small. In some countries, however, geothermal energy production contributes significantly to their energy budget and their CO2 emissions are relatively significant. SUCCEED is a targeted innovation and research project which aims to investigate the reinjection of CO2 produced at geothermal power production sites and develop, test and demonstrate at field scale innovative measurement, monitoring and verification (MMV) technologies that can be used in most CO2 geological storage projects. The project is carried out at two operating geothermal energy production sites, the Kızıldere geothermal field in Turkey and the CarbFix project site at the Hellisheiði geothermal field. Together with a brief description of the seismic monitoring technologies proposed in the project, this paper presents the details of the two field sites and the progress made in installing and testing of the surface fibre-optic cables at the Hellisheiði geothermal field in Iceland.

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Section: Seismic Monitoring Technologies Used In the Projectmentioning

confidence: 99%

SUCCEED: A CO2 storage and utilisation project aimed at mitigating against greenhouse gas emissions from geothermal power production

Durucan

Korre

Parlaktuna³

et al. 2021

SSRN Journal

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“…a sudden impact produced by a weight drop) should be employed to generate seismic wave fields with sufficient energy and frequency bandwidth (e.g. Brodic et al, 2019;Pertuz et al, 2020). The adequate energy ensures the wave fields propagate down to the depth of targets and travel back to the surface.…”

Section: Introductionmentioning

confidence: 99%

Reverse time migration (RTM) imaging of iron oxide deposits in the Ludvika mining area, Sweden

Ding

Malehmir

2021

Solid Earth

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Abstract. To discover or delineate mineral deposits and other geological features such as faults and lithological boundaries in their host rocks, seismic methods are preferred for imaging the targets at great depth. One major goal for seismic methods is to produce a reliable image of the reflectors underground given the typical discontinuous geology in crystalline environments with low signal-to-noise ratios. In this study, we investigate the usefulness of the reverse time migration (RTM) imaging algorithm in hardrock environments by applying it to a 2D dataset, which was acquired in the Ludvika mining area of central Sweden. We provide a how-to solution for applications of RTM in future and similar datasets. When using the RTM imaging technique properly, it is possible to obtain high-fidelity seismic images of the subsurface. Due to good amplitude preservation in the RTM image, the imaged reflectors provide indications to infer their geological origin. In order to obtain a reliable RTM image, we performed a detailed data pre-processing flow to deal with random noise, near-surface effects, and irregular receiver and source spacing, which can downgrade the final image if ignored. Exemplified with the Ludvika data, the resultant RTM image not only delineates the iron oxide deposits down to 1200 m depth as shown from previous studies, but also provides a better inferred ending of sheet-like mineralization. Additionally, the RTM image provides much-improved reflection of the dike and crosscutting features relative to the mineralized sheets when compared to the images produced by Kirchhoff migration in the previous studies. Two of the imaged crosscutting features are considered to be crucial when interpreting large-scale geological structures at the site and the likely disappearance of mineralization at depth. Using a field dataset acquired in hardrock environment, we demonstrate the usefulness of RTM imaging workflows for deep targeting mineral deposits.

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Broadband seismic data acquisition using an E-vib source for enhanced imaging of iron-oxide deposits, Sweden

Cited by 2 publications

References 15 publications

SUCCEED: A CO2 storage and utilisation project aimed at mitigating against greenhouse gas emissions from geothermal power production

SUCCEED: A CO2 storage and utilisation project aimed at mitigating against greenhouse gas emissions from geothermal power production

Reverse time migration (RTM) imaging of iron oxide deposits in the Ludvika mining area, Sweden

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