Djibouti Geothermal

8/3/2019 Djibouti Geothermal

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PILOT PROJECT FOR ENERGY AND MINING

ECONOMIC BENEFICT FROM ASAL (DJIBOUTI)

GEOTHERMAL AND MINERAL RESOURCESRepublic of Djibouti


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INTRODUCTION

The policy of the Government is to provide assistance to any local andforeigner investors to obtain permits/concessions for geothermal andmining exploration and then to evaluate and to develop the potentialityof the geothermal and mineral resources of the country in general andparticularly in Asal.

Commitment of the Government of Djibouti to promotethe economical development of the Asal region

Significant geothermal and mining resources indicatorsavailability support theses objectives

Pilot project proposal for geothermal and mining developmentfor the new Asal development ple

As a lot of effort and money has been spent on the geothermal explorationwork qt Qsql Djibouti is interested to plan and build a pilot complex plantto provide electric power and water to the region. A pilot project could

also be used as a tool to train local staff for larger geothermal plants


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GENERAL PRESENTATION OFTHE REPUBLIC OF DJIBOUTI

Area: 23 000 km Coast line: 370 km Annual mean rainfall: 150 mm Population: 600 000 (65 % in Djibouti) Urban population: 82 % Natural growth rate: 3 % Absolute poverty: 20 % GDP: 532.5 million $ Industry in GDP: 3.8 % Agriculture in GDP: 0.5 % Services in GDP: 80 % Electricity production: 260 GWh

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ALI SABIEHDIKHIL

DJIBOUTI

TADJOURAH

OBOCK

ARTA

ASAL

ABHE

ALOL

GAGGADE

INAKIR

Republic of Djibouti


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Forecast ofElectricity demand

250

260

270

280

290

300

310

320

2000 2001 2002 2003 2004 2005 2006

Electricityde

mandGwh

48

49

50

51

52

53

54

55

56

57

Peakde

mandMw

Energy production1971 - 2003

0

50000

100000

150000

200000

250000

300000

1971 1975 1979 1983 1987 1991 1995 1999 2003

EnergyproductionMWh Republic of Djibouti

Energy production and new demands


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Perspectives of new electricity demands

Projects MW

Port and international free zone of Doral > 20

Asal economic zone 6

Sea-water desalination plant for Djibouti city > 20

Cement and building material factories. Ali Saibeh 6

Mining project in Gaggad 5

Estimated total > 57



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Afar Depression. Horn of Africa



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#ALOL

INAKIR

ARTA

TAMATTAKO

S. GHOUBHET

Nth. GHOUBET

DJIBOUTI

ALFITA

GEOTHERMAL AREAS

OF THE REPUBLICOF DJIBOUTI


OBOCK

GAGGADE

ABHE


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GEOTHERMAL HISTORY OF DJIBOUTI

The different geothermal programmes including field studies andexploration by drillings between 1970 and 1990, revealed the deep Asalgeothermal reservoir with high salinity fluid and other potentialgeothermal areas. However, all these investigations did not allowed yetany exploitation of the geothermal energy.

The history of geological, geophysical, drillings, and testings for themajority in the Asal area, confirm that the Asal geothermal resources arepotential, with multiple reservoirs.

Also, the previous studies and drillings in Asal, have recognized thepresence of a shallow potential reservoir at a depth between 400 m and600 m, with less salinity, and temperature between 130C and 180C.

Some other places were investigated by geological and geologicalpreliminary studies but no exploration drilling were realized up to now



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Asal Geothermal areaRepublic of Djibouti

ASAL 1 & 3

ASAL 2

ASAL 4

ASAL 6

ASAL 5



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Temperature profiles Asal geothermal area


0

500

1000

1500

2000

2500

0 100 200 300 400

Temprature C

Profondeurm

ASAL3

ASAL4

ASAL5

ASAL6

Intermediatereservoir


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1316 m

2013 m

2105 m

ASAL 5ASAL4ASAL 1, 3, 6

Asal series

Stratoid series

Dalha basalts

Alluviums

Clays

Hyaloclastites

Rhyolites

Basalts

Trachytes500 m

Interpretative section accross theAsal rift Geothermal area



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ASAL-GOUBHET DEVELOPMENT PROJECT


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ARTA

DJIBOUTI

TADJOURAH

S

Dock

P

AuAu

AuGeoth


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Geothermal well ASAL1 chemical analysis

ppm ppbCl Mg Mn Fe Ni Cu Pb Zn

78 100 24 115 10 5 112 1 070 34 000


Screen Position Wellhead % ppmdiameter on screen P (atm) T (C) SiO2 Pb Zn Cu Fe Ag S Cd

2" upstream15 210 13.8 56 0.045 0.0115 6 0.45 8.75 104

downstream 3.8 81.3 0.027 0.0141 1.68 0.47 11.7 1673" upstream

12.5 20625.1 19.4 1.74 0.3 12 0.66 4.12 425

downstream 11.9 58.4 2.19 0.33 4.61 0.56 10.4 6404" upstream

8.5 188 29.9 0.48 12.3 0.9 13.1 0.37 6.18 2800downstream

5" upstream5.8 180 27.5 0.5 11.2 7.32 9.41 0.52 8.8 4400

downstream 42.5 0.27 1.55 0.42 14.4 0.0397 1 572

Fluid analysis

Scree deposits analysis


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Preliminary data on gold in Southwestern area of Asal


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Construction plan for the Dock in Goubet


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Shallow reservoir

Review of geophysical and geological data available

Drill 5 new wells up to 600 mTesting and analysis of fluid, reservoir engineering and modelingEnvironmental impact assessment

Deep reservoir

Review the status of A3 and A6 wellsClean the wells and equipmentsDo the necessary work in case of obstructionPut into production the productive wellsCarry out new testing and analysis of the fluidPerform technology study of recovering mineral resources

Seismic risk studyEIA

Development of 5 10 MW Pilot Plant for both reservoirs

Feasibility study and design of the power plantLocal distribution line study

SCOPE OF WORK


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CONCLUSIONS

It is clear that energy is considered as the key, the motor and the base of alleconomical, social well-being and development for any country of the world.

The availability and access to sufficient low cost energy contribute largely tothe economic growth, the reinforcement of the competitiveness of the country,the upgrading of the daily life of the population and, of course, the reduction ofthe poverty.

With the creation of an economic pool in Asal, there will be growing market

demand for power to provide all business services associated with theestablishment of different mineral plants and water desalination units as wellas tourism activities. Lake Asal has a high potential for tourism.

By this pilot project, the government policy is to initiate:

The development of Assal naturals resources,

The production of electricity from existing geothermal sources,

The recovery of minerals from geothermal fluid,The provision of the necessary base infrastructures which facilitate the

exploitation of other mineral resource of the region,

The demonstration to the international private sector that Assal geothermaland mineral resources are attractive and constitute real, profitable businessopportunities for investment.


Djibouti Geothermal

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