Geothermal Drilling in Enel Green Power - · PDF fileUso: inserire classificazione Larderello,...

Geothermal Drilling in Enel Green Power

October 2013

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Larderello, the heart of geothermal industry

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…at the beginning of the geothermal development (20th century)

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Drilling rigs evolution

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At the beginning of 20th century… now …..

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Enel Green Power drilling department capabilities includes:

• Wells design

• New wells drilling

• Workover or deepening activities on existing wells

• Peculiar activities management:

Drilling mission

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� Drilling Supervision

� Cementing jobs, stimulations

� Mud service

� Mud logging

� Fishing Operations

• Well plug and abandonments, debris management,

environmental restore

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Drilling Unit Organization Chart

Drilling Unit

Development Operation Machinery Management Cements and Fluids

International ActivitiesPool

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• Design of mining activities

• External resources planning and managing

• Support activities(Quality, Safety, Environment, Permitting, Fuel management)

• Drilling site management

• Drilling site supervision

• Drilling shift

• Management and logistics of rigs and drilling equipments

• Rigs Maintenance

• Technical support

• Move-in, Move-out

• Design of cements and fluids

• Operation of cementing unit

• Cements and fluids Laboratory

DevelopmentTeam Team and Maintenance Team Team

Functions involved in international projects

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Geothermal Italian Wells

Production n. 310 Reinjection n. 63 Control n. 118

Increase in the complexity

10264

92

233

0-1000 1000-2000

2000-3000

> 3000

No Wells by Depth (m)No Wells by Depth (m)

Increase in the complexity

The evolution is due to:

- reduction of noise

- separation of condensate

- treatment of fluids inside wells

Tot. 491

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Geothermal drilling

State of art

• HIGH AVERAGE DEPTH OF WELLS (FROM 3500m TO 4500m)

• DIRECTIONAL DRILLING ON SPECIFIC TARGETS

• DEVELOPMENT OF CEMENTING TECHNOLOGIES FOR DEEP AND HIGH TEMPERATURE WELLS

• DEVELOPMENT OF BEST PRACTICE AND GEOTHERMAL ORIENTED TOOLS

• SAFETY AND ENVIRONMENTAL COMPLIANCE

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Exploration wells are drilled to hit the targets defined by mining exploration department

Vertical, directional or multilateral wells

1 to 5 wells drilled from the same pad

at depth of 1000 ÷ 4500 m Montieri 1well

Production

over 240 t/h of steam

Geothermal drilling

ADVANCED RIG

• capacity 5500m

• soundproof technology

• automatic trailer-mounted rig

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Depth <1500 m

Depth 1500

3000 m

Depth 3000

5200 m

Total

New wells 193

Vertical 30 15 29 74

Directional 8 36 72 116

Multi Lateral 0 1 1 2

Horizontal 1 0 0 1

EGP Italy activity from 1990 to 2012

Horizontal 1 0 0 1

Slim Holes - - - 2

Workovers

- - - 106

Well plug and abandonments

- - - 314

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Depth <1500 m

Depth 1500

3000 m

Depth 3000

5200 m

Total

New wells 4

Vertical 0 0 2 2

Directional 0 1 1 2

Slim Holes 0 0 0 0

EGP Italy activity in 2012

Slim Holes 0 0 0 0

Workovers

- 3 5 8

Well plug and abandonments

- - - 3

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HH300 Automatic track-mounted rig

Mas 6000 E

EGP drilling rigs

Type

n°

Maximum

input power

HP

ActuatedHook load

capacity

(t)

Set-back

capacity

(t)

Gross nominal

capacity

(ton)

HH 300 E 1 1540 Diesel-Hydraulic 272 272 \ \

Mas 6000 E 5 1700 453 272 604

MR 7000 E 1 700 159 113 227

ST6 1 175 Diesel 50 40 70

Diesel-Electrical

All the rigs are sound proof

Rigs detailed list

3 rig crews operating 365 days/year23

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1981-Greece – Milos Island: 3 wells drilled

1984-China -Tibet: Yangbaijing field characterization

1985-Hawaii: Puna field development project

1989-Bolivia - Laguna Colorada: 5 wells drilled

1985-Turkey: Kizildere field well tests and production optimization

1992-Nicaragua, Indonesia, Philippine: Research

International drilling activities in the past

1992-Nicaragua, Indonesia, Philippine: Research and development of several geothermal fields

2001-France - Soultz: 2 wells drilled and technical support of the HDR project

2003-Salvador: Total development of wells for a new 40MW geothermal power plant

2005-U.S.A.: Total development of wells for 3 new geothermal power plants

2008-Chile – El Tatio, Apaceta: 5 exploration wells drilled, ground level at 4500m

2012-Turkey – Alasheir, Simav, Gediz: 7 exploration slim hole wells drilled

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Drilling activities plannedin 2014÷2015

USA

(Still Water exploitation)

N°1 Shallow Well 2013/2014

Linea 1

Linea 2

Linea 3

Slim Holes Ricerca

2014

• Perforazione in Italia(3 equipaggi)

• Cerro Pabellon Chile

• Perù

• USA

• TurkeyMexicoSalvador

1st Q

2nd Q

3rd Q

4th Q

Linea 1

Linea 2

Slim Holes Chile

2015

Supporto tecnico

1st Q

2nd Q

3rd Q

4th Q

Perù

(exploration)

N°1 SH 2014 + n°1 SH 2015

Slim Holes

Shallow well

Chile

Cerro Pabellon (100MW)

N°26 wells 2014÷2018

Italy (740MW)

Exploitation with three crews

An average of 6 wells per year

Exploration: 4 slim holes

Ingegneria a supporto

Attività di Cantiere

Chile (exploration)

N°1 SH 2013 + n°1 SH 2014

SH: pozzo slim hole

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International Drilling activities: ChileCerro Pabellon deep exploration

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