TY - JOUR

T1 - Innovating land seismic investigations for CO2 geologic storage in Denmark

AU - Papadopoulou, Myrto

AU - Zappalá, Samuel

AU - Malehmir, Alireza

AU - Gregersen, Ulrik

AU - Hjelm, Lars

AU - Nielsen, Lars

AU - Haspang, Martin Patrong

N1 - Publisher Copyright: © 2023 Society of Exploration Geophysicists.

PY - 2023

Y1 - 2023

N2 - The increasing global interest in geologic carbon storage as a feasible way of reducing CO2 atmospheric levels requires extensive onshore high-resolution seismic investigations to characterize suitable storage sites, for example, close to major CO2 emitters. To partly address this challenge and to acquire quality data at shallower and greater depths in a cost and time-effective approach, a tailored acquisition scheme was adopted and tested at a candidate site in Stenlille, Denmark. The survey aims at understanding whether an anticline reservoir structure known to exist at a 1000 m depth can serve for long-term CO2 storage and presents the structural integrity for this purpose. The data were recorded using a combination of nodal arrays, spaced at 10 m in a fixed geometry, and a set of more closely (2 m) spaced digital recorders, mounted on a landstreamer, which was moved at each shot location. Two 12 t mini vibrators were used as seismic sources. The nodal and landstreamer data sets are compared and combined into a unique data set for reflection imaging purposes along five profiles with a total length of approximately 12 km. The seismic sections obtained using this tailored combination of different recorders provide images of the entire shallow and deeper structures with an unprecedented resolution at the different depth levels necessary to assess the full potential of the suggested CO2 storage reservoir. The results significantly increase the existing knowledge of the extent and structural closure of the reservoir as well as a possible fault, all of which are critical for future risk analysis and planning of the storage.

AB - The increasing global interest in geologic carbon storage as a feasible way of reducing CO2 atmospheric levels requires extensive onshore high-resolution seismic investigations to characterize suitable storage sites, for example, close to major CO2 emitters. To partly address this challenge and to acquire quality data at shallower and greater depths in a cost and time-effective approach, a tailored acquisition scheme was adopted and tested at a candidate site in Stenlille, Denmark. The survey aims at understanding whether an anticline reservoir structure known to exist at a 1000 m depth can serve for long-term CO2 storage and presents the structural integrity for this purpose. The data were recorded using a combination of nodal arrays, spaced at 10 m in a fixed geometry, and a set of more closely (2 m) spaced digital recorders, mounted on a landstreamer, which was moved at each shot location. Two 12 t mini vibrators were used as seismic sources. The nodal and landstreamer data sets are compared and combined into a unique data set for reflection imaging purposes along five profiles with a total length of approximately 12 km. The seismic sections obtained using this tailored combination of different recorders provide images of the entire shallow and deeper structures with an unprecedented resolution at the different depth levels necessary to assess the full potential of the suggested CO2 storage reservoir. The results significantly increase the existing knowledge of the extent and structural closure of the reservoir as well as a possible fault, all of which are critical for future risk analysis and planning of the storage.

U2 - 10.1190/geo2022-0693.1

DO - 10.1190/geo2022-0693.1

M3 - Journal article

AN - SCOPUS:85163073112

VL - 88

SP - B251–B266

JO - Geophysics

JF - Geophysics

SN - 0016-8033

IS - 5

ER -