TNO’s perspective on dutch subsurface information for GEO-ELEC: a geological survey and national geo-energy research perspective

Jan-Diederik van Wees

GeoELEC workshop Utrecht 24 januari 2012

Outline

General Data availability

Play types

Mesozoic Aquifers, currently target for direct heat – information

system ThermoGIS

Deep temperature, active faults, chararacterization of ‘paleozoic

rocks

Well & Seismic Data

Wells: 5876

Seismic: 72.000 km

Log data

Dutch database: over 50 billion Euro of data

Gamma ray

Sonic

Resistivity

Neutron, etc

Petrophysics

Cores: 100 km

Poro/perm: 60.000 measurements

(300.000 total)

www.NLOG.nl

•All kinds of well data & seismic data accessible and free to download

Seismic interpretation Lateral resolution 250 m

Mesozoic structure

Reasons to develop ThermoGIS Permits geothermal energy 2010

Gas fields

Permit areas

Interest is booming

Currently over 100 permits granted

Geological properties and uncertainties

Independent analysis and information

Overview potential areas and ‘hot spots’

Performance assessment

Quickscan

Realization of market opportunities

General development scheme

ThermoGIS – project on aquifers

Comprehends:

3D mapping reservoirs (aquifers)

Depth, thickness and temperature Temperature

(Thickness) porosity, permeability Transmissivity

Uncertainties

Potential energy

Development ThermoGIS application

Visualisation map

Performance assessment tool

Economic assessment tool

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Susanne Nelskamp

Estimation of erosion

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Van Wees et al.,2012

Bonte et al.,2012

Pluymaekers et al., 2012

Kramers et al.,2012

Potential estimates – for specific application areas

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Doublet performance

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Flow-rate Q Dp

Dp generated by pumps

Which consume electricity

Dp is restricted by safety

measures

Dp at surface does not linearly lead to

Higher flow rates (friction in tubes)

Permeability X thickness

Viscosity distance

D

Sr

L

kHpQ

w

ln

2

E [MWth] = Q*DT * CP

Tp=70 C Ti=25 C

Sensitivity to transmissivity (kH)

1

1.5

2

2.5

3

3.5

4

4.5

0 10 20 30 40 50 60 70

Doublet Power [MWth]

Dep

th [

km

]

5 Dm

7.5 Dm

10 Dm

15 Dm

20 Dm

50 Dm

100 Dm

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Tgreenhouse = 45

Treturn = 25

Tg = 30C/km

1

1.5

2

2.5

3

3.5

4

4.5

0 5 10 15 20 25 30

Costs of Energy [EUR/GJ]

Dep

th [

km

]

5 Dm

7.5 Dm

10 Dm

15 Dm

20 Dm

50 Dm

100 Dm

Aquifer depth and thickness mapping

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Aquifer distribution M

em

be

r

Aquifer Selection

3D modelling

DST (N=52)

BHT(N=1241)

Results - temperature (1)

Input

process

Legend

* marked by uncertainty

φaverage

transmissivity

map

well data

3D subsurface

models

porosity map

petrophysical

analysis kaverage

collocated

co-kriging

permeability

trend map

permeability

map

max burial depth

linear

transformation

regression

Ln(kav) = a + bφav

k x H

aquifer thickness

Calculated well averages

residuals k

trend

kriging

*

*

*

* 1

2

3 4

5

Property mapping

• Automated workflow

• Connectivity to database

• Geostatisics for uncertainties

Property mapping and uncertainties (2)

Property mapping and uncertainties (3)

Rotliegendes aquifer

Potential Map

Rotliegendes aquifer

potential map vs earlier assessments

Mapped stratigraphic areas

White: insufficient amount of data or other stratigraphic units (like

Carboniferous)

2007 2011

Main points Aquifers

Free access to oil and gas data excellent stepping stone for

geothermal exploration and information systems

Over 15 aquifers mapped, stacked in 4 groups

Rotliegendes, Triassic, Jurassic-Cretaceous, Tertiary

Tedhnical potential ca 85,000 PetaJoules, almost equivalent to

heating value of giant groningen gas-field

web-based information system split for different stakeholders

Basic version, not showing subsurface information

Expert version

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www.thermogis.nl

Geothermal electricity resource assessment

Vision on EGS development (IF-Technology,TNO,KEMA)

Proposal for National Research Program on geothermal energy

Pilot project feasibility studies

TNO National geological survey: Ongoing mapping activities

Diepe geothermie

Nationaal Onderzoek

Programma

Geothermie (NOPG)

Breed inzetbare goedkope duurzame energie

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26

Cloetingh et al. 2010 (Earth-Science Reviews)

Engineered Geothermal Systems - EGS

BHT data (n=1241)

ICS (n=412)

Initial Cylindrical source

Used to correct simpler AAPG methods

AAPG + AAPGcorrected (n=829)

For comparison

DST much less (n=52)

BHT wells and

E&P licenses

DST data

N=52

Results - temperature (3)

Misfits

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Implications for EGS

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Depth to Paleozoic basement

(Geluk, 2007)

To be updated by mapping

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October 10, 2011

Regional studies – VARISCAN BASIN DEVELOPMENT

Dinantian (Ziegler, 1990)

Kombrink, 2008 (PhD thesis)

Page 34

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Southern Permian Basin Atlas,

Kombrink et al., 2010 Geluk et al., 2007

Carboniferous Carbonate Platforms N

A

B 5km

3000 TWT (ms)

3500 TWT (ms)

2000 TWT (ms)

2500 TWT (ms)

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Carboniferous platforms

Kombrink,

2008 (thesis)

Sonke

(this study)

Mapping of Dinantian-Silisian horizon

High

Low

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Summary

Mesozoic Clastic Aquifers well mapped UR locally in excess of 1%

Temperature data and model

Active faults

Paleozoic Carbonates (platforms) proposed as target in various pilot

projects

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