TY - JOUR
T1 - Quantitative seismic interpretation of the Lower Cretaceous reservoirs in the Valdemar Field, Danish North Sea
AU - Bredesen, Kenneth
AU - Lorentzen, Mads
AU - Nielsen, Lars
AU - Mosegaard, Klaus
N1 - Funding Information:
Funding This work was funded by the Danish Hydrocarbon Research and Technology Centre (DHRTC), project number TRD.1D.03.
Publisher Copyright:
© 2021 The Author(s).
PY - 2021/11
Y1 - 2021/11
N2 - A quantitative seismic interpretation study is presented for the Lower Cretaceous Tuxen reservoir in the Valdemar Field, which is associated with heterogeneous and complex geology. Our objective is to better outline the reservoir quality variations of the Tuxen reservoir across the Valdemar Field. Seismic pre-stack data and well logs from two appraisal wells form the basis of this study. The workflow used includes seismic and rock physics forward modelling, attribute analysis, a coloured inversion, and a Bayesian pre-stack inversion for litho-fluid classification. Based on log data, the rock physics properties of the Tuxen interval reveal that the seismic signal is more governed by porosity than water-saturation changes at near-offset (or small angle). The coloured and Bayesian inversion results were generally consistent with well-log observations at the reservoir level and conformed to interpreted horizons. Although the available data have some limitations and the geological setting is complex, the results implied more promising reservoir quality in some areas than others. Hence, the results may offer useful information for delineating the best reservoir zones for further field development and selecting appropriate production strategies.
AB - A quantitative seismic interpretation study is presented for the Lower Cretaceous Tuxen reservoir in the Valdemar Field, which is associated with heterogeneous and complex geology. Our objective is to better outline the reservoir quality variations of the Tuxen reservoir across the Valdemar Field. Seismic pre-stack data and well logs from two appraisal wells form the basis of this study. The workflow used includes seismic and rock physics forward modelling, attribute analysis, a coloured inversion, and a Bayesian pre-stack inversion for litho-fluid classification. Based on log data, the rock physics properties of the Tuxen interval reveal that the seismic signal is more governed by porosity than water-saturation changes at near-offset (or small angle). The coloured and Bayesian inversion results were generally consistent with well-log observations at the reservoir level and conformed to interpreted horizons. Although the available data have some limitations and the geological setting is complex, the results implied more promising reservoir quality in some areas than others. Hence, the results may offer useful information for delineating the best reservoir zones for further field development and selecting appropriate production strategies.
UR - http://www.scopus.com/inward/record.url?scp=85119101213&partnerID=8YFLogxK
U2 - 10.1144/petgeo2021-016
DO - 10.1144/petgeo2021-016
M3 - Article
AN - SCOPUS:85119101213
SN - 1354-0793
VL - 27
JO - Petroleum Geoscience
JF - Petroleum Geoscience
IS - 4
M1 - petgeo2021-016
ER -