Johan ten Veen (TNO), Harald de Haan (EBN) and Stefan Peeters (TNO)
Abstract
The uppermost Jurassic – Lower Cretaceous marine sequence is referred to as the Rijnland Group in the Dutch nomenclature. The interval represents a late syn-rift to post-rift transgressive system with several higher order southward prograding coastal-to-shelf sandy sequences (known as the Vlieland Sandstone Formation; KNNS) that interfinger with marine clays of the Vlieland Claystone Formation. The interval hosts the main reservoirs for oil in the Netherlands, which have produced over 90% of Dutch oil. Currently the Dutch Lower Cretaceous reservoirs are also potential targets for geothermal energy and saline aquifer CO2 storage. In the current Dutch nomenclature, the individual sandstone units of the KNNS have been subdivided into 13 (!) individual lithostratigraphic members. These members have different names per sub-basin, are stacked in some places (especially along the southern part of the basin), but may also be laterally time-equivalent to each other in other places. As part of the Geode project (see below for more information), the individual lithostratigraphic members have been grouped chronostratigraphically in four main reservoir units based on legacy biostrat data and regional occurrences. This enables a better interpretation and visualization of facies distribution, reservoir presence and reservoir properties on a regional scale, of which some of the results are presented during this PGK presentation.
About the presenter
Johan ten Veen (TNO): Johan graduated from the Vrije Universiteit in Amsterdam where he obtained a degree in Geology in 1991. In 1998, Johan received his PhD from Utrecht University on a study covering the interplay between tectonics, geodynamics and sedimentation of the Neogene Cretan segment of the Hellenic arc in Greece. From 1998 to 2004 Johan held postdoc positions at the University of Minnesota in Minneapolis (U.S.A.) and at the Vrije Universiteit in Amsterdam. From 2004-2006 he worked as an independent geology consultant conducting seismic interpretation and fieldwork studies. In 2006 Johan became a researcher and lecturer at the Ruhr university in Bochum. Since 2009, Johan works at the Expertise Group for Subsurface modelling, TNO-Geological Survey of the Netherlands, where he generates and maintains several subsurface digital geomodels of the Dutch subsurface and cross-border regions. His research activities focus on integrated basin studies for characterization of all types of energy reservoirs.
Harald de Haan (EBN): After graduating at Utrecht University obtaining a degree in Geology (specialisation Geophysics) in 1993 Harald started his career at the Geological Survey of the Netherlands in Haarlem (in later years TNO) in the department advising the ministry of Economic affairs on exploration and production licenses. In 2006 he joined EBN working mainly on NAM and GDF Suez assets. Harald joined GDF-Suez (later ENGIE , Neptune Energy and now ENI) in 2011 and was part of the team developing the Q13-Amstel field and contributed to working up exploration and infill wells in the K&L blocks. In 2018 Harald joined TNO to work on regional scale projects working on the Brussels Sand in the WarmingUp project (geothermal potential), in the joint industry project PaleoFive on Lower Carboniferous in 5 countries around the North Sea and on the national mapping program focusing on the West Netherlands Basin. In 2022 Harald started working at EBN as Geoscientist to contribute to CO2 storage in the Netherlands.
Stefan Peeters (TNO): Stefan is a structural geologist by background and graduated from Utrecht University in 2016. After working for 2.5 years as a GIS-consultant at engineering company Sweco, Stefan joined TNO in 2019 where has been working now for the past 5.5 years. Stefan is mainly involved in conducting regional scale tectonostratigraphic analyses and creating geological (reservoir) models by making use of seismic- and well log data. The past few years he has been involved in several TNO multi-disciplinary studies that have focused on various intervals in the Dutch offshore, such as ZEPHYR (Zechstein)., MAXIM (Upper Jurassic), DEVLI (Lower Cretaceous and Upper Jurassic) and CREST (Upper Cretaceous).
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