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Cross-Borehole ERT: Sensitivity, Model Resolution, and Field Data Quality

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Cross-Borehole ERT: Sensitivity, Model Resolution, and Field Data Quality. / Meldgaard Madsen, Line; Kühl, Anders Kristian; Lévy, Léa; Christiansen, Anders Vest.

2021. Abstract fra EAGE Near Surface Geoscience 2021, Bordeaux, Frankrig.

Publikation: KonferencebidragKonferenceabstrakt til konferenceForskningpeer review

Harvard

APA

CBE

Meldgaard Madsen L, Kühl AK, Lévy L, Christiansen AV. 2021. Cross-Borehole ERT: Sensitivity, Model Resolution, and Field Data Quality. Abstract fra EAGE Near Surface Geoscience 2021, Bordeaux, Frankrig.

MLA

Meldgaard Madsen, Line o.a.. Cross-Borehole ERT: Sensitivity, Model Resolution, and Field Data Quality. EAGE Near Surface Geoscience 2021, 30 aug. 2021, Bordeaux, Frankrig, Konferenceabstrakt til konference, 2021.

Vancouver

Meldgaard Madsen L, Kühl AK, Lévy L, Christiansen AV. Cross-Borehole ERT: Sensitivity, Model Resolution, and Field Data Quality. 2021. Abstract fra EAGE Near Surface Geoscience 2021, Bordeaux, Frankrig.

Author

Bibtex

@conference{987a650d8f854aaca626f379e5c6d22a,
title = "Cross-Borehole ERT: Sensitivity, Model Resolution, and Field Data Quality",
abstract = "Sensitivity, resolution, and data quality are important parameters to consider when designing an ERT cross-borehole survey. We present an open-source algorithm for computing 2D and 3D sensitivity patterns of any borehole setup and use this to compare single-borehole and different cross-borehole electrode configurations, which both show complex patterns. To study the resolution capability of an entire survey, the model resolution matrix is computed for a field dataset. The dataset is split into different electrode configurations and the model resolution matrices of the different configuration are compared. The results show that the sensitivity and resolution decreases very quickly away from the electrodes, especially for the single-borehole configurations. In the studied field case, this means cross-borehole configurations are needed to correctly image the area between the boreholes, even though the cross-borehole data often are associated with a lower signal-to-noise ratio due to near-zero potential measurements and generally more outliers. The study concludes that in a production mode, where acquisition time and thus the number of possible data points are limited, the combination of electrode configurations must be carefully considered and a trade-off between resolution and data quality must be evaluated.",
author = "{Meldgaard Madsen}, Line and K{\"u}hl, {Anders Kristian} and L{\'e}a L{\'e}vy and Christiansen, {Anders Vest}",
year = "2021",
language = "English",
note = "null ; Conference date: 30-08-2021 Through 01-09-2021",
url = "https://eage.eventsair.com/nsg2021/",

}

RIS

TY - ABST

T1 - Cross-Borehole ERT: Sensitivity, Model Resolution, and Field Data Quality

AU - Meldgaard Madsen, Line

AU - Kühl, Anders Kristian

AU - Lévy, Léa

AU - Christiansen, Anders Vest

PY - 2021

Y1 - 2021

N2 - Sensitivity, resolution, and data quality are important parameters to consider when designing an ERT cross-borehole survey. We present an open-source algorithm for computing 2D and 3D sensitivity patterns of any borehole setup and use this to compare single-borehole and different cross-borehole electrode configurations, which both show complex patterns. To study the resolution capability of an entire survey, the model resolution matrix is computed for a field dataset. The dataset is split into different electrode configurations and the model resolution matrices of the different configuration are compared. The results show that the sensitivity and resolution decreases very quickly away from the electrodes, especially for the single-borehole configurations. In the studied field case, this means cross-borehole configurations are needed to correctly image the area between the boreholes, even though the cross-borehole data often are associated with a lower signal-to-noise ratio due to near-zero potential measurements and generally more outliers. The study concludes that in a production mode, where acquisition time and thus the number of possible data points are limited, the combination of electrode configurations must be carefully considered and a trade-off between resolution and data quality must be evaluated.

AB - Sensitivity, resolution, and data quality are important parameters to consider when designing an ERT cross-borehole survey. We present an open-source algorithm for computing 2D and 3D sensitivity patterns of any borehole setup and use this to compare single-borehole and different cross-borehole electrode configurations, which both show complex patterns. To study the resolution capability of an entire survey, the model resolution matrix is computed for a field dataset. The dataset is split into different electrode configurations and the model resolution matrices of the different configuration are compared. The results show that the sensitivity and resolution decreases very quickly away from the electrodes, especially for the single-borehole configurations. In the studied field case, this means cross-borehole configurations are needed to correctly image the area between the boreholes, even though the cross-borehole data often are associated with a lower signal-to-noise ratio due to near-zero potential measurements and generally more outliers. The study concludes that in a production mode, where acquisition time and thus the number of possible data points are limited, the combination of electrode configurations must be carefully considered and a trade-off between resolution and data quality must be evaluated.

M3 - Conference abstract for conference

Y2 - 30 August 2021 through 1 September 2021

ER -