add to your favorites

 

 Open Blocks: DIODORE ZAMA BLOCKS

 

 

 

GEOGRAPHICAL SETTING

The E7 (Diodore) and E6 (Zama) blocks are situated in the eastern offshore Tunisia (Gulf of Gabes). They cover respectively an area of about 1236 sq.km; and 1444 sq.km.

ACREAGE

Block Diodore: 1236 km²
Block Zama:  1444 km²

PREVIOUS EXPLORATION

Some of 1999 km of 2D seismic lines have been acquired over the two areas between 1965 and 1992. Two (02) wells were drilled within the Diodore block while four (04) were drilled within the Zama block in order to test different tertiary and Cretaceous plays.

SEISMIC

DATE

SURVEY

LENGTH(KM)

ENERGY

COMPANY

1965

GA     

68,74

DYNAMITE

CGG

1965

GB      

55,44

DYNAMITE

CGG

1965

GC     

28,3

DYNAMITE

CGG

1965

GD     

59,9

DYNAMITE

CGG

1965

GE     

55,73

DYNAMITE

CGG

1972

GK     

122,86

FLEXOTIR

CGG

1972

GL     

122

VAPORCHOC

CGG

1972

GP     

49,5

FLEXOTIR

CGG

1973

GQ     

49,5

FLEXOTIR

CGG

1973

M-500  

125,7

VAPORCHOC

CGG

1974

CY11   

15,18

VAPORCHOC

CGG

1974

N      

146

VAPORCHOC

CGG

1975

R      

138,5

VAPORCHOC

CGG

1976

V      

38,5

VAPORCHOC

CGG

1984

DS84   

440,32

AIRGUN

GSI

1984

M84    

17,23

AIRGUN

PRAKLA//CFPS

1984

P84    

101

AIRGUN

HORIZON

1986

DS86   

199,35

AIRGUN

GSI

1989

HTN    

82,4

AIRGUN

GSI

1991

MZ91   

27,25

AIRGUN

WESTERN

1992

YZO    

17

AIRGUN

GOLDEN GEOPHYSICAL

1992

TWT92  

38,43

AIRGUN

CGG

WELLS

 

BLOCK

WELL

TD (m)

FORMATION AT TD

 OPERATEUR

DATE

STATUS
DIODORE

AML-1

 

NMR-1

3374

 

3030

L. PALEOCENE EL HARIA

 

E. YP. METLAOUI GP

DST Petroleum

 

BHP Petroleum

1987

 

1990

 P&A


P&A
ZAMA

GA-1

HBL-1

NRS-1

NRS-2

9866,5

2820

3194

2900

 U. Turonian Aleg

Ypresian Chouabine

Upper Albian

U. Turonian Bireno

 SNPA-ERAP

Elf Aquitaine

Elf Aquitaine

BHP Petroleum

 1967

1975

1977

1993

 P&A

P&A

P&A

P&A

 

RESERVOIRS

 

1- The Late Ypresian El Garia Formation is  considered the most prolific target within the two blocks. This reservoir is characterized by a good petrophysical parameters related to several diagenetic leaching stages. Porosity can reach 20% and the permeability range from few to several mD. This reservoir produce oil in the geant Ashtart field.

 

2- The Senonian  Abiod Chalk is the primary proven reservoir in the Miskar Field to the north of Zama and Diodore blocks, where it contributes 55% of the gas production. The Abiod Formation as an effective reservoir may therefore be unique in the Gulf of Gabes.  

 

SECONDARY RESERVOIR


• The Turonian-Coniacian carbonates members comprise oolite shoals, grainstones and reefal packstones facies. These carbonates form one of the main reservoirs within the Miskar gasfield and contain 45% of the reserves.

Source rocks

Two proven source rocks are present in the Gulf of Gabes

- The Bou Dabbous shales made of deep marine facies, well developed to the north, is considered as oil-prone kerogen, mature for oil generation in the Zama / Diodore area.

- The Upper Cenomanian-Lower Turonian limestones underlying the Upper Cretaceous reservoirs are probably mature for gas generation at present-day within Zama/Diodore blocks. The Bahloul is the proven source for Miskar gas Field. 

Traps

The main traps include four way deep closure, faulted anticline and tilted blocks.