Geological maps

Introduction

Since 1985 the Geological Survey of the Netherlands is commissioned to compile a consistent, regional-scale petroleum geological framework for the subsurface of the Netherlands, both on- and offshore. The general approach and workflow of the deep mapping program correspond to that of the hydrocarbon E&P industry, but on a regional instead of a reservoir scale.
Firstly the onshore mapping was executed and published on paper (onshore geological atlas, TNO-NITG, 2004) and the offshore domain was covered between 2004 and 2010 (Kombrink et al., 2012). Since 2010 the onshore area is in the process of revision with an upgraded fully digital workflow and using new available public data. It is targeted at new resources and functions of the subsurface, such as unconventional hydrocarbon resources, geothermal energy potential and storage of natural gas, oil, CO2, rain water and nuclear waste. The increasing demand for deep subsurface space with specific rock properties and utilization potential, presents potential subsurface planning conflicts.
Such issues are, amongst others, dealt with in a new policy for underground spatial planning (STRONG - Structuurvisie Ondergrond), which is currently being prepared by the Dutch government (publication in autumn 2015). This policy paper will be the guideline for a sustainable and responsible use of the subsurface of the Netherlands. Our subsurface data and models serve as input to this initiative.

Data

The DINO database contains over 135 3D seismic surveys covering around 99.900 km2 and more than 577.000 km 2D seismic lines (analogous- & digital lines). The number of non-confidential wells is around 5800. All publicly free 3D-surveys and 1305 wells have been used to stratigraphically constrain the modelling process. 2D Seismic data has been used to fill in areas not covered by 3D seismic surveys (Fig. 1 - seismic coverage, Fig. 2 - wells used).

Digital Geological Model releases

The Digital Geological Model-deep (DGM-deep) is a regional subsurface layer model covering the on- and offshore of the Netherlands. Twelve geological horizons, ranging from Carboniferous to Neogene in age, are the constituents of this stacked grid model. The model is based on interpretations of publicly available 2D and 3D seismic survey data, combined with a variety of well data, supported by biostratigraphical, petrophysical and geochemical analysis. The interpreted seismic horizons are the bases of lithostratigraphic units, which are defined in the Stratigraphic Nomenclature of the Netherlands.
Previous versions of the DGM-deep models and their related data can be retrieved through the Dutch oil and Gas Portal. The links in the table below will direct the user to relevant webpages. The current released DGM-deep v4.0 is a model of the Netherlands onshore extended to the 3 mile zone (more information, see Model details). For the first time the model can also be examined in a viewer via DINOloket (https://www.dinoloket.nl/ondergrondmodellen). In future DGM-deep releases the onshore and offshore areas will be combined and deliverables will also contain 3D modelled fault planes.

Use and uncertainties

DGM-deep aims at providing a regional geological understanding of the build-up of the deep subsurface of the Netherlands. This implies that the model should not be consulted for reservoir scale issues and -evaluation. To assess the usability and reliability of the DGM-deep model, uncertainties have been addressed in the modelling workflow. An explanatory note is provided describing the uncertainty procedure applied. 

 

 

DGM Version
v1.0
v2.0
v3.0
v4.0
Release data
2002
2006
2010
2014
Pulication
2004
2006
2012
 
Area
Onshore
On-Offshore
Offshore
Onshore
Project
GEO-atlas
NCP-1
NCP-2
 
Projection
RD-Bessel 1841
ED50-UTM31
ED50-UTM31
RD-Bessel 1841
Velocity model
Multiple
VELMOD-1
VELMOD-2
VELMOD-3
Faults
Yes
Yes
Yes (Subareas A-G)
No
3D Fault planes
No
Yes
Yes
No
Dinoloket
 
 
 
Yes