Integration of Sequence Stratigraphic Analysis and 3D Geostatistical Modeling of Pliocene–Pleistocene Delta, F3 Block, Netherlands

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Authors are thankful to the OpendTect software for providing us NorthSea F3 block open-source data. We are also thankful to the Department of Earth and Environmental Sciences, Bahria University, Karachi Campus, for providing state-of-the-art software support and grateful to the for letting us use their Digital Geophysical Data Lab for data interpretation. We would also like to show our acknowledgement to the Department of Geoscience, University of Oslo for their immense cooperation through providing IT lab with advanced systems for completing the corrections related to this research. Last but not the least, truly grateful to Mr. Salman Naseer from Department of Geophysics, University of Padua, Italy, for continuous encouragement and technical support in this research.

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    This research is focused on the analysis of the sequence stratigraphic units of F3 Block, within a wave-dominated delta of Plio–Pleistocene age. Three wells of F3 block and a 3D seismic data, are utilized in this research. The conventional techniques of 3D seismic interpretation were utilized to mark the 11 surfaces on the seismic section. Integration of seismic sequence stratigraphic interpretation, using well logs, and subsequent 3D geostatistical modeling, using seismic data, aided to evaluate the shallow hydrocarbon traps. The resulting models were obtained using System Tract and Facies models, which were generated by using sequential stimulation method and their variograms made by spherical method, moreover, these models are validated via histograms. The CDF curve generated from upscaling of well logs using geometric method, shows a good relation with less percentage of errors (1 to 2 for Facies and 3 to 4 for System Tract models) between upscaled and raw data that complements the resulted models. These approaches help us to delineate the best possible reservoir, lateral extent of system tracts (LST and/or HST) in the respective surface, and distribution of sand and shale in the delta. The clinoform break points alteration observed on seismic sections, also validates the sequence stratigraphic interpretation. The GR log-based Facies model and sequence stratigraphy-based System Tract model of SU-04-2 showed the reservoir characteristics, presence of sand bodies and majorly LST, respectively, mainly adjacent to the main fault of the studied area. Moreover, on the seismic section, SU-04-2 exhibits the presence of gas pockets at the same location that also complements the generated Facies and System Tract models. The generated models can be utilized for any similar kind of study and for the further research in the F3 block reservoir characterization.

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Haris Ahmed KHAN, Ali Asghar SHAHID, Muhammad Jahangir KHAN, Taher ZOUAGHI, Maria Dolores ALVAREZ, Syed Danial Mehdi NAQVI.2023. Integration of Sequence Stratigraphic Analysis and 3D Geostatistical Modeling of Pliocene–Pleistocene Delta, F3 Block, Netherlands[J]. Acta Geologica Sinica(),97(1):256-268

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  • Received:January 19,2021
  • Revised:September 22,2021
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  • Online: February 28,2023
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