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   Open Block: Errend N7


Errend N7

 

GEOGRAPHICAL SETTING

Northeastern onshore and offshore Tunisia.

ACREAGE

616 km².

PREVIOUS EXPLORATION

About 350.700 km of 2D seismic lines have been shot and three (03) wells have been drilled by different operators since 1953.

SEISMIC 

Date

Survey       

Operator

Source

N of Km

Contractor

1971

NUMERIQUE    

BUTTES

DYNAMITE

6.852

SEISCOM/PETTY RAY

1978

X            

SEREPT

VAPORCHOC

2.980

CGG

1971

MT

Murphy

Airgun

15.153

CGG

1980

CBK          

EGEP

DYNAMITE

23.125

CGG

1981

BT81         

BURMAH

VAPORCHOC

50.687

C.G.G./HORIZON

1991

EH91         

AGIP

 

11.167

SEISMOGRAPH SERVISE

1992

TWT92        

ETAP/CGG

AIRGUN

1.499

CGG

1994

ZEM94        

Maxus

AIRGUN

3.376

TLC

 2002

AKK          

 ANSHUTZ

 VIBROSEIS

27.736

 CGG

DRILLING

DATE

WELLNAME

OPERATOR

TD(m)

AGE at TD

SHOWS

1953

KA1                           

SEREPT

1410

Upper Cretaceous

 Oligocene

1954

KA2                            

SEREPT

3186

 Upper Cretaceous

 ----

1992

SDM1                          

MARATHON

1912

Barremian-Aptian

 Upper Cretaceous

GEOLOGICAL SETTING

Errend block lies in North-Eastern Tunisia, and it is within the imbrication zone and Northern Atlas belt. The tectonic framework is characterized by NW-SE trending Upper Cretaceous graben systems (e.g. Grombalia, El Haouaria).

HYDROCARBON POTENTIAL

Reservoirs: The main targets in the block are:
- the Campanian Abiod fractured chalky limestones,
- the Ypresian Bou Dabbous fractured limestones,
- Halk El Menzel limestone (penetrated by the nearby SDM-1 well) and
- the Triassic fractured dolomites. The Abiod is a proven reservoir tested condensate in the vicinity of the block (in the Zinnia field) and the Bou Dabbous is proven reservoir tested oil in the nearby Belli and El Manzah fields.

Source Rocks: Several source rocks are present in the block. These source rocks include the Ypresian Bou Dabbous organic- rich limestones, the Late Cenomanian – Early Turonian Bahloul laminated limestones, the Albian lower Fahdene Moualha black shales and The Baremian black limestones including in the M'Cherga Formation.

Traps: The trap types in this block are mainly structural including faulted anticlines, roll-over anticlines, footwall and hanging wall traps. Possible stratigraphic traps include Upper Cretaceous buildups and Lower Cretaceous turbiditic sandstones.