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Introduction

Within the conventional mapping framework of NCP-1 the Geological Survey of the Netherlands - TNO has started a detailed mapping program with emphasis on petroleum-geological topics, such as:

- facies analysis within a tecto-stratigraphic framework, - petrophysical analysis of cored reservoir intervals, - property modeling of actual and potential reservoirs, - 3D burial history of source and reservoir rocks.

The aim of this study is to present a more

comprehensive model of the subsurface to future and current operators in the oil industry in a basin-scale petroleum-system.

Deliverables

For the Terschelling Basin and southern Dutch Central Graben the following deliverables will be compiled:

- depth maps and isopach maps of major lithostratigraphic units

- 3D fault model

- velocity model with V0 grids and K-values - subcrop maps

- tecto-stratigraphic diagram - well correlations - erosion maps

- thickness, facies and property maps of reservoirs - source rock maps and diagrams with migration paths - maturity and burial diagrams

- pressure and temperature data

TNO

|

Knowledge for business

Advisory Group for the Ministry of Economic Affairs

Poster Witmans 06RS

TNO Built Environment and Geosciences Geological Survey of the Netherlands PO Box 80015

3508 TA Utrecht The Netherlands

Nora Witmans

Petroleum-geological mapping

– Terschelling Basin and southern Dutch Central Graben

NCP-2 D

NCP-2 F NCP-2 C

NCP-2 G

NCP-2 B

NCP-2 A

NCP-2 E

0 25 50 km

NCP-2A = southern Dutch Central Graben and Terschelling Basin NCP-2B = Schill Grund High and Ameland Block NCP-2C = Step Graben, northern Dutch Central Graben and Elbow Spit High NCP-2D = Cleaverbank High

NCP-2E = Vlieland Basin, Central Offshore Platform and Texel-IJsselmeer High NCP-2F = Broad Fourteens Basin and West Netherlands Basin NCP-2G = Brabant Massif and Winterton High

2006

2007 2008 2008

2009

2009

2010

NC P-2A

02.55 10 15 20

km

TB

AB

HFZ FP VB COP

DCG

CBH

SGH

L G M F

Gas Gas & Oil Oil Upper Jurassic Posidonia Shale Formation Lower-Upper Jurassic base Zechstein faults

Cretaceous

Jurassic

Triassic Zechstein

Triassic

Zechstein

RBMVC

RBMVL MD

3860

3870

3880

3890

3900

3910

3920

3930

3940

3950 3952 3852

0.00GR150.00 0.00C10.000.0000POROc40.0000

0.0000PORalt40.0000

ShaleShaleShaleShaleSandShale

LithGR_RBM L02-02 [MD]

MD

4130

4140

4150

4160

4170

4180

4190

4200

4210

4220 4120

0.00GR150.00 0.00C10.000.0000POROc40.0000

0.0000POR40.0000

Shale

Shale

ShaleSandSandShaleShale

LithGR_RBM L02-05 [MD]

MD

3880

3890

3900

3910

3920

3930

3940

3950

3960

3970

3978 3878

0.00GR150.00 0.00C10.000.0000POROc40.0000

0.0000POR40.0000

ShaleShaleSandShale

LithGR_RBM M01-02 [MD]

MD

2760

2770

2780

2790

2800

2810

2820

2830

2840

2850

2858 2758

0.00GR150.00 0.00C10.000.0000POROc40.0000

0.0000PORalt40.0000

ShaleShaleShale

Shale

ShaleSand

Sand

ShaleShale

LithGR_RBM M07-02 [MD]

RBMVC

RBMVL

M04-03 L06-03

L05-07 L05-FA-101

L01-02 L01-06

6000 5000 4000 3000 2000 1000 0

0 5 10 15 20 km

Cleaver Bank

High Dutch Central Graben

Terschelling Basin

Ameland Block

Upper North Sea Group Middle and Lower North Sea groups Chalk Group

Rijnland Group

Schieland and Scruff groups with intra-Upper Jurassic marker "B3"

Altena Group with Posidonia Shale Fm Upper Germanic Trias Group Lower Germanic Trias Group Zechstein Group Upper Rotliegend Group Limburg Group oil

W E

gas fault

TVDSS

Figure 2 Structural geological map of the Terschelling Basin and southern Dutch Central Graben with the distribution of Lower – Upper Jurassic sediments, the distribution of the Posidonia Shale Formation (Lower Jurassic source rock) and oil & gas fields. TB Terschelling Basin, DCG Dutch Central Graben. The cross section is shown in figure 7

Figure 1 Location map showing an overview of the areas. The Terschelling Basin and southern Dutch Central Graben are located in area 2A

Figure 3 Depth map and isopach map of the Lower Germanic Trias Group showing that the base of the Triassic deposits is deeper than 6000m between saltdomes

Figure 7 Geological cross section across the Terschelling Basin and southern Dutch Central Graben showing producing oil & gas fields

NCP-2 A rb _depth

02.55101520

km scale 1: 300000

< 2000 200 -2500 300 -3500 3500 - 4000 4000 - 4500 4500 - 5000 5000 - 5500 5500 - 6000

> 6000 RB_fault

NCP-2 A rb _isopach

RB_fault 02.5510 1520km

scale 1: 300000

0 - 100 100 -200 200 -300 300 - 400 400 - 500 500 - 600 600 - 700 700 - 800

> 900 RB_fault

Figure 5 Seismic section with lateral Zechstein salt intrusions in the Upper Germanic Trias Group

Figure 6 Petrophysical evaluation of the Lower Volpriehausen Sandstone Member of the Lower Germanic Trias Group. This reservoir is a medium to fine grained sandstone, irregularly layered. The calculated results and porosity values measured from core samples show very good correlation

Figure 4 3D image of the top of the Zechstein Group in the mapped area. In the western part of the area the salt domes penetrate through the base of the North Sea Super Group (Cenozoic)

All deliverables will be made available at the end of January 2007 through the NL Oil and Gas portal www.nlog.nl and

in DINOLoket www.dinoloket.nl.

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