Prediction of porosity and water saturation of chalks from combined refraction seismic and reflection ground-penetrating radar measurements
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Prediction of porosity and water saturation of chalks from combined refraction seismic and reflection ground-penetrating radar measurements. / Yuan, Hemin; Abdu, Abdurrahman Zango; Nielsen, Lars.
I: Geophysics, Bind 88, Nr. 3, 2023, s. MR141-MR153.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Prediction of porosity and water saturation of chalks from combined refraction seismic and reflection ground-penetrating radar measurements
AU - Yuan, Hemin
AU - Abdu, Abdurrahman Zango
AU - Nielsen, Lars
N1 - Publisher Copyright: © 2023 Society of Exploration Geophysicists. All rights reserved.
PY - 2023
Y1 - 2023
N2 - The prediction of porosity and water content of near-surface chalks is important for agricultural, environmental, hydrologic, and geologic engineering investigations. However, current methods based on laboratory measurements or crosshole ground-penetrating radar (GPR) are typically costly and applicable to only a limited area. We have combined the refraction seismic and reflection GPR data sets measured on the ground surface along a 96 m long profile line to predict the porosity and water saturation simultaneously. Using integrated rock-physics templates, we develop and apply a quantitative method that combines acoustic and electromagnetic velocities to estimate the petrophysical parameters of chalks. The seismic and GPR data are processed independently and subsequently combined to invert the porosity and water saturation. Field data tests demonstrate that the predicted results are consistent with laboratory measurements and field observations, demonstrating that the integration of seismic and GPR data facilitates efficient and reliable estimates of the porosity and saturation of chalks on scales relevant to regional field mapping. Hence, this method allows the petrophysical parameters of near-surface chalks to be evaluated efficiently at a regional scale.
AB - The prediction of porosity and water content of near-surface chalks is important for agricultural, environmental, hydrologic, and geologic engineering investigations. However, current methods based on laboratory measurements or crosshole ground-penetrating radar (GPR) are typically costly and applicable to only a limited area. We have combined the refraction seismic and reflection GPR data sets measured on the ground surface along a 96 m long profile line to predict the porosity and water saturation simultaneously. Using integrated rock-physics templates, we develop and apply a quantitative method that combines acoustic and electromagnetic velocities to estimate the petrophysical parameters of chalks. The seismic and GPR data are processed independently and subsequently combined to invert the porosity and water saturation. Field data tests demonstrate that the predicted results are consistent with laboratory measurements and field observations, demonstrating that the integration of seismic and GPR data facilitates efficient and reliable estimates of the porosity and saturation of chalks on scales relevant to regional field mapping. Hence, this method allows the petrophysical parameters of near-surface chalks to be evaluated efficiently at a regional scale.
U2 - 10.1190/GEO2022-0405.1
DO - 10.1190/GEO2022-0405.1
M3 - Journal article
AN - SCOPUS:85160806877
VL - 88
SP - MR141-MR153
JO - Geophysics
JF - Geophysics
SN - 0016-8033
IS - 3
ER -
ID: 362147883