TY - JOUR
T1 - Coupling earth surface processes and geological structures to explain environmental features as observed onshore Northern Netherlands
AU - Smit, Florian
AU - Magri, Fabien
AU - Bregman, Enno
N1 - Funding Information:
Johan ten Veen (TNO Netherlands) is kindly thanked for providing the seismic and well data for this project, as well as guiding seismic horizons. Schlumberger is kindly thanked for providing Petrel E&P software suite and a license for eXchromaSG. Wolfgang Weinzierl (SLB) is kindly thanked for his extensive knowledge on Petrel. Eliis is kindly thanked for providing PaleoScan? software to generate a 3D Relative Geological Time Model.
Publisher Copyright:
© 2018 SEG
PY - 2018/8/27
Y1 - 2018/8/27
N2 - Methods in physical geography (study of surface processes) and geology (subsurface processes) are often applied separately. However the governing physical processes are strongly coupled so that an integration of these two disciplines provides a unique opportunity to gain an encompassing understanding of observations at the Earth's surface, while better constraining the controlling subsurface processes. Here we provide an example of such integration based on a case study, the Drentsche Aa brook valley (DA), onshore Netherlands. In the DA, surface observations (vegetation types, peat thickness, and groundwater pressures) are likely related to the occurrence of salt diapirs that warped overlying strata into a steep dome just 100-200 meter below the subsurface. A 3D geological model of the DA based on onshore 3D seismic data provides important context for observations made at the surface. By juxtaposing the information in smart visualizations, the spatial relationship between surface observations and shallow salt diapirs is straightforward. We suggest that deep regional groundwater flow is likely forced towards the surface by the occurrence of these impermeable structures, which results in high groundwater pressure and elevated temperatures, saltwater vegetation, and thick peat formation. These insights are important for the surrounding hydrocarbon fields, as the data show that a shallow regional seal is possibly leaking. In addition, we show that the physical geographic discipline can very much benefit from integration with geology and vice versa.
AB - Methods in physical geography (study of surface processes) and geology (subsurface processes) are often applied separately. However the governing physical processes are strongly coupled so that an integration of these two disciplines provides a unique opportunity to gain an encompassing understanding of observations at the Earth's surface, while better constraining the controlling subsurface processes. Here we provide an example of such integration based on a case study, the Drentsche Aa brook valley (DA), onshore Netherlands. In the DA, surface observations (vegetation types, peat thickness, and groundwater pressures) are likely related to the occurrence of salt diapirs that warped overlying strata into a steep dome just 100-200 meter below the subsurface. A 3D geological model of the DA based on onshore 3D seismic data provides important context for observations made at the surface. By juxtaposing the information in smart visualizations, the spatial relationship between surface observations and shallow salt diapirs is straightforward. We suggest that deep regional groundwater flow is likely forced towards the surface by the occurrence of these impermeable structures, which results in high groundwater pressure and elevated temperatures, saltwater vegetation, and thick peat formation. These insights are important for the surrounding hydrocarbon fields, as the data show that a shallow regional seal is possibly leaking. In addition, we show that the physical geographic discipline can very much benefit from integration with geology and vice versa.
UR - http://www.scopus.com/inward/record.url?scp=85065014362&partnerID=8YFLogxK
U2 - 10.1190/segam2018-2995900.1
DO - 10.1190/segam2018-2995900.1
M3 - Conference article in journal
AN - SCOPUS:85065014362
SN - 1052-3812
VL - 2018
SP - 1519
EP - 1523
JO - SEG Technical Program Expanded Abstracts
JF - SEG Technical Program Expanded Abstracts
T2 - Society of Exploration Geophysicists International Exposition and 88th Annual Meeting, SEG 2018
Y2 - 14 October 2018 through 19 October 2018
ER -