Geothermal Drilling in Enel Green Power October 2013
Larderello, the heart of geothermal industry at the beginning of the geothermal development (20 th century) 2 2
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Drilling rigs evolution At the beginning of 20 th century now.. 15 15
Drilling mission Enel Green Power drilling department capabilities includes: Wells design New wells drilling Workover or deepening activities on existing wells Peculiar activities management: Drilling Supervision Cementing jobs, stimulations Mud service Mud logging Fishing Operations Well plug and abandonments, debris management, environmental restore 16 16
Drilling Unit Organization Chart Drilling Unit International Activities Pool Development Operation Machinery Management Cements and Fluids Team Team and Maintenance Team Team 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 Functions involved in international projects 17 17
Geothermal Italian Wells Uso: inserire classificazione Production n. 310 Reinjection n. 63 Control n. 118 Increase in the complexity 233 No Wells by Depth (m) 102 64 Tot. 491 92 The evolution is due to: -reduction of noise -separation of condensate -treatment of fluids inside wells 0-1000 1000-2000 2000-3000 > 3000 18
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 19
Geothermal drilling 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 ADVANCED RIG capacity 5500m soundproof technology automatic trailer-mounted rig 20
EGP Italy activity from 1990 to 2012 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 Slim Holes - - - 2 Workovers - - - 106 Well plug and abandonments - - - 314 21
EGP Italy activity in 2012 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 Workovers - 3 5 8 Well plug and abandonments - - - 3 22
EGP drilling rigs Type n Maximum input power HP Rigs detailed list Actuated Hook load capacity (t) Set-back capacity (t) Gross nominal capacity (ton) Mas 6000E HH 300 E 1 1540 Diesel-Hydraulic 272 272 \\ Mas 6000 E 5 1700 453 272 604 Diesel-Electrical MR 7000 E 1 700 159 113 227 ST6 1 175 Diesel 50 40 70 All the rigs are sound proof HH300 Automatic track-mounted rig 3 rig crews operating 365 days/year 23
International drilling activities in the past 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 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 24
Drilling activities planned in 2014 2015 Perforazione in Italia (3 equipaggi) Linea 1 Linea 2 Linea 3 2014 Uso: inserire classificazione 2015 Slim Holes Ricerca Cerro PabellonChile Linea 1 Linea 2 USA (Still Water exploitation) N 1 Shallow Well 2013/2014 Perù Slim Holes Chile Slim Holes USA Shallow well Perù (exploration) N 1 SH 2014 + n 1 SH 2015 Turkey Mexico Salvador Supporto tecnico 1st Q 2nd Q 3rd Q 4th Q 1st Q 2nd Q 3rd Q 4th Q Chile Cerro Pabellon(100MW) N 26 wells 2014 2018 Ingegneria a supporto Attività di Cantiere Chile (exploration) N 1 SH 2013 + n 1 SH 2014 Italy (740MW) Exploitation with three crews An average of 6 wells per year SH: pozzo slim hole Exploration: 4 slim holes 25
International Drilling activities: Chile Cerro Pabellon deep exploration Uso: inserire classificazione 26