erdwerk aapg keynote

FROM VISION TO REALITY: Unlocking the Geothermal Potential

Daniel Bendias, Ulrich Steiner, Neil Farquharson, Alexandros Savvatis

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Introduction/Motivation

Case Study: Schäftlarnstraße München

How to unlock the potential

Oil & Gas vs Geothermal - What`s the Difference?

Outline

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Introduction/Motivation

Outline

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City of Munich: 70% CO2 reduction for 2040

60 % of the

Energy Demand in Germany

is Heat!

CO

2 in

10

00t/

a

geothermal power/heat

building insulation

Goal: -70% CO2

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555

After: „Geologische Karte von Bayern 1:50000“, Bayerisches Geologisches Landesamt, 1996

Malm Reservoir (Upper Jurassic)

Munich

~ 130 km

~ 150 °C

~ 85 - 120 °C

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Geology of the molasse basin – N-S cross section

Alps

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basinreef

quarry, Swabian Alb

6

EW

500m

Reservoir Geology: Reef vs. Basin Carbonates

dolomitisation

fractures

karst

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Meyer & Schmidt-Kaler 1989


Year Concessions

2002 4

2004 >40

2013 >80

today ca. 50

Rosenheim

Large-Scale Permit

Exploration Permit

Production Permit

Geothermal ConcessionFields

Injection WellProduction Well

Geothermal Wells

Development of the Concessions Fields in Bavaria

Geothermal Concessions in Bavaria

Feb. 2019

~ 130 km

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negative temperature

anomaly


(Status: March 2019)

Bavarian Geothermal

Atlas

Financial Crisis & Dry Well (Mauerstetten)

Image Log (Riem)

3D-Seismicfor Geothermal(Unterhaching)

2D-Seismicfor Geothermal(Unterföhring)

Drilled Meters in Bavaria

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Political framework and technology impactsgeothermal development

Time to plan project

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Outline

Oil & Gas vs Geothermal – What’s the Difference?

X

X

X

X

X

Geothermal:

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O&G vs Geothermal – What’s the Difference?

Oil & Gas:

Production per geothermal well Bavaria: 27.000 – 71.000 bbl/d // 50-150l/s

Production per oil well USA (eia): <15 - 400 bbl/d // 0,02 - 0,75 l/s

Less geological elements but veryproductive reservoir needed

Temperature

11

Conceptual planning of a deviated well path

Seismic line and fault interpretation

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Technology in Geothermal: 2005


Geothermal G&G workflow:

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Exploration and Development – Gap Analysis?

Oil & Gas - G&G workflow:

Exploration: geological concepts & outcrop analogues, 2D / 3D seismic, numerical models

Exploration: geological concepts & outcrop analogues, 2D / 3D seismic, numerical models

Development: development wells, (some well logs)…Development: detailed geological models, target planning, development wells…

Part of the O&G exploration phase is missing for typical small geothermal projects with local operators

+ exploration wells, well-logs, cores, petrophysics - no exploration wells, well-logs, cores, petrophysics

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Exploration and Development – How to Close Those Gaps

1. Larger operators - multiple projects in one basin exploration data

2. Contractor with multi project expertise – exploration without exploration

3. Political framework, R&D, publicly available data

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State of the Art Geothermal Workflow

A solid geology is not enough!

Integration of all disciplines

Geology and drilling engineering arestrongly linked – Life adjustment ofgeological model to reality needed

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Case Study: Schäftlarnstraße, München

Outline


Schäftlarnstraße Project – Operator Stadtwerke Munich:

~50 MW th.

6 Wells (3 injectors, 3 producers)

+ First multilateral reservoir development

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Target Planning Schäftlarnstraße 2014

Reservoir thickness map: 2014 based on 2D seismic:4 wells

Source: M. Meinecke 2018


GRAME R&D Project: 2016 Large 3D Seismic in Munich

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Schäftlarn-straße

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Reef Complex

Basin Basin

Top Purbek

Top Lithokalk

Base Malm

Seismic Interpretation

EW

~ 50

0m

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Target Planning Schäftlarnstraße 2017

Reservoir thickness map 2014 based on 2D seismic:4 wells

Reservoir thickness map 2017 based on 3D seismic:6 wells

Source: M. Meinecke 2018

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First Wells Successfully drilled!

Th1 first well:

Depth: 3860 m MD / 2809 m TVD

Productivity: 120l/s (4,51 l/s/bar)

Temperature: 104°C

Source: S. Dirner 2018


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Full Reservoir Development: Multi-Well Scenario in Munich

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How to unlock the potential?

Outline


Lets unlock the potential?

Technical – Close the Technology Gap:

Oil and Gas Workflow Adopted

Political – Create a Thriving Environment:

Think Big - Growing Project Scale / Portfolio Approach

Integration of all Disciplines

Free Information (Geothermals Atlas of Bavaria)

Risk Minimization – Exploration Insurance (Belgium), Subsidies …

R&D Initiatives

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References

• https://de.wikipedia.org/wiki/M%C3%BCnchen#/media/File:Luftbild_M%C3%BCnchen_Innenstadt.jpg

• After: „Geologische Karte von Bayern 1:50000“, Bayerisches Geologisches Landesamt, 1996

• scotese.com

• Geothermal Atlas (2004) / https://www.geotis.de/geotisapp/geotis.php

• www.eia.gov

• Presentation SWM 2018 Michael Meineke F2.1 https://www.der-geothermiekongress.de/tagungsband/

• Presentation SWM 2018 Sebastian Dirner F2.2 https://www.der-geothermiekongress.de/tagungsband/

• Steiner U, Savvatis A, Boehm F, Schubert A. Explorationsstrategie tiefer geothermischer Ressourcen am Beispiel des sueddeutschenOberjuras (Malm). In: Bauer M, Freeden W, Jacobi H, editors. Handbuch Tiefe Geothermie. Berlin Heidelberg: Springer Spektrum Verlag; 2014. p. 429–57. doi:101007/978-3-642-54511-5

• Boehm F, Savvatis A, Steiner U, Schneider M, Koch R. Lithofacies and characterization of the geothermal Malm reservoir in the greaterarea of Munich. Grundwasser. 2012;18(1):3–13. doi:10.1007/s00767-012-0202-4.

• Meyer, R.K.F., Schmidt-Kaler, H.: Paläogeographischer Atlas des süddeutschen Oberjura (Malm). Geol. Jb. A 115, 77 (1989)

® Erdwerk GmbH 201925.04.2019

Geothermal Projects CO2 Savings Munich (compared to gas)

Munich

Pullach: 6000 t/a

Unterföhring: 16000 t/a

Aschheim: 6400 t/a

Riem: 12000 t/a

Sauerlach: 35000 t/a

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