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Exploration wellbore: 2/4-9

General information

NPDID wellbore:	253
Well name:	2/4-9
Drilling operator name:	Phillips Petroleum Company Norway
Geodetic datum:	ED50
Coordinates:	56° 36` 22.20`` N	3° 5` 08.50`` E
UTM coordinates:	6273690.65 N	505260.88 E
UTM zone:	31
Drilled in production licence:	018
Area:	NORTH SEA
Discovery:	1/6-1 ALBUSKJELL
Field:	ALBUSKJELL
Drill permit:	91-L
Drilling facility:	ZAPATA EXPLORER
Drilling days:	58
Wellbore entry date:	13.08.1973
Wellbore completion date:	09.10.1973
Original wellbore purpose:	WILDCAT
Wellbore purpose:	APPRAISAL
Wellbore status:	P&A
Wellbore contents:	GAS/CONDENSATE
Discovery wellbore:	NO
Formation/age with hydrocarbons 1:	TOR FM / LATE CRETACEOUS
Seismic location:	LINE P 60/30515 SP.1121
Kelly bushing elevation (KB) [m]:	35
Water depth [m]:	69
Total Depth (MD) [m]:	3752
Final vertical depth (TVD) [m]:
Max inclination [°]:
Bottom hole temperature [°C]:	106
Oldest penetrated age:	LATE CRETACEOUS
Oldest penetrated formation:	HOD FM
Note: All depths, except the water depth, are relative to kelly bushing (RKB)

Wellbore history

General

Wildcat well 2/4-9 was drilled on the southeast flank of the Albuskjell structure, 6 km southeast of the Shell 1/6-1 well, which was drilled on the saddle in the middle of the structure. The Danian Limestone was the expected pay zone, and if porosity was present, the Late Cretaceous Limestone was also expected to be hydrocarbon bearing. Planned TD was 3810 m (12500 ft).

Operations and results

Well 2/4-9 was spudded with the jack-up installation Zapata Explorer on 13 August 1973 and drilled to TD at 3752 m in the Late Cretaceous Hod Formation. The well was drilled and tested in 58 days, without significant technical problems. Deviation surveys were carried out down to 2448 m and the maximum deviation to this depth was 1.25 deg.

The Danian limestone was encountered at 3214 m and the Late Cretaceous limestone at 3306 m. The Late Cretaceous limestone yielded commercial oil and gas on two drill stem tests while the Danian limestone yielded no commercial hydrocarbons.

No cores were cut and no wire line fluid samples taken.

The well was permanently abandoned on 9 October 1973 as a gas and condensate appraisal.

Testing

Four DST's were carried out in the chalk, DST 1 and 2 in the Late Cretaceous and DST 3 and 4 in the Danian. The results here are after acidizing: DST 1 from 3360 - 3368 m flowed 121 Sm3 oil and 97700 Sm3 gas /day through a 96/64" choke. The oil gravity was 43 deg API and the GOR was 801 Sm3/Sm3. DST 2 from 3308 to 3359 m and 3360 to 3368 m flowed 461 Sm3 oil and 455900 Sm3 gas /day through chokes 20/64" + 24/64". The oil gravity was 44 deg API and the GOR was 977 Sm3/Sm3. DST 3 from 3274 - 3283 m and DST 4 from 3222 - 3225 flowed only small amounts of water with traces of oil.

Cuttings available at the NPD

Interval [m]: 496.82 - 3753.61

Cores available at the NPD

No cores in this wellbore.

Scanned core photos

No scanned core photos available

Palynological slides available at the NPD

No palynological slides in this wellbore.

Oil samples available at the NPD

No oil samples available.

Casing and leak-off tests

Type	Casing diam. [inch]	Depth below KB [m]	Hole diam. [inch]	Hole depth below KB [m]
CONDUCTOR	30	177.0	36	178.0
SURF.COND.	20	487.0	26	488.0
SURF.COND.	13 3/8	1219.0	17 1/2	1219.0
INTERM.	9 5/8	2438.0	12 1/4	2438.0
LINER	7	3752.0	8 1/2	3752.0

Mud

Depth MD [m]	Mud weight [g/cm³]	Visc. [MPa.s]	Mud type
173	1.07		seawater
487	1.08	50.0	seawater
1219	1.31	55.0	seawa/ben
2438	1.49	55.0	seawa/ben
3752	1.71	55.0	barite

Drill stem test (intervals and pressures)

Test no.	Test interval [m]	Choke size [mm]	Final shut in pressure [MPa]	Final flow pressure [MPa]	Bottom hole pressure [MPa]	Downhole temperature [°C]
1.0	3360 - 3369					0
2.0	3308 - 3369					0
3.0	3274 - 3283					0
4.0	3222 - 3224					0

Drill Stem Test (recovery)

Test no.	Oil [Sm³/day]	Gas [Sm³/day]	Oil grav. [g/cm³]
1.0	128	982558	.802
2.0	507	4029449	.802
3.0	0	0
4.0	0	0

Available logs

Log type	Intervals logged [m]
GR	104 - 315
BHC	315 - 1228
BHC-C	1222 - 3752
IES	315 - 3752
FDC	3078 - 3706
SNP	3078 - 3706
PML	3078 - 3706
CDM	2896 - 3706
CDM AP	2896 - 3706
CDM PP	2896 - 3706
CBL	2438 - 3383
VELOCITY	109 - 3754

Lithostratigraphy

Top depth [m]	Litostratigraphic unit
104	NORDLAND GP
3021	ROGALAND GP
3021	BALDER FM
3037	SELE FM
3042	LISTA FM
3092	VIDAR FM
3118	LISTA FM
3197	VÅLE FM
3215	SHETLAND GP
3215	EKOFISK FM
3306	TOR FM
3647	HOD FM

Composite log

No composite log presently available.

Geochemical information

File 1	(Format:PDF. Size: 0.157 Mb )
File 2	(Format:PDF. Size: 0.943 Mb )

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Documents reported by the licencees (period for duty of secrecy expired)

2_4_9(9X)_Well_Completion_Report_and_Completion_log	(Format:PDF. Size: 13.371 Mb )
2_4_9(9X)_Additional_Biostratigraphic_Analysis	(Format:PDF. Size: 0.148 Mb )
2_4_9(9X)_Biostratigraphy_of_the_Interval_5110_12315ft	(Format:PDF. Size: 3.516 Mb )
2_4_9(9X)_Geochemical_Characterization_of_DST_Samples	(Format:PDF. Size: 1.847 Mb )
2_4_9(9X)_Individual_Well_Production_Test	(Format:PDF. Size: 9.425 Mb )

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Old NPD WDSS reports, NPD papers and other related documents

WDSS_General_Information

(Format:PDF. Size: 0.258 Mb )

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