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	Generated 31.07.2010

Exploration wellbore: 2/7-16

General information

NPDID wellbore:	232
Well name:	2/7-16
Drilling operator name:	Phillips Petroleum Company Norway
Geodetic datum:	ED50
Coordinates:	56° 25` 21.68`` N	3° 5` 41.87`` E
UTM coordinates:	6253268.30 N	505858.17 E
UTM zone:	31
Drilled in production licence:	018
Area:	NORTH SEA
Drill permit:	245-L
Drilling facility:	NORTRYM
Drilling days:	115
Wellbore entry date:	20.03.1980
Wellbore completion date:	12.07.1980
Original wellbore purpose:	WILDCAT
Wellbore purpose:	WILDCAT
Wellbore status:	P&A
Wellbore contents:	SHOWS
Discovery wellbore:	NO
Seismic location:	PG-2/7-F
Kelly bushing elevation (KB) [m]:	25
Water depth [m]:	71
Total Depth (MD) [m]:	4818
Final vertical depth (TVD) [m]:	4812
Max inclination [°]:	4.75
Bottom hole temperature [°C]:	125
Oldest penetrated age:	EARLY CRETACEOUS
Oldest penetrated formation:	ÅSGARD FM
Note: All depths, except the water depth, are relative to kelly bushing (RKB)

Wellbore history

General

Wildcat well 2/7-16 was drilled on a structure on a broad terrace to the south of Edda field and with a geological environment similar to Edda. The primary objective was to test the potential for hydrocarbon production from Danian and Late Cretaceous Limestones on a low relief structural closure. Secondary objective was a possible stratigraphic trap potential in Early Cretaceous sandstones.

Operations and results

Well 2/7-16 was spudded with the semi-submersible installation Nortrym on 20 March 1980 and drilled to TD at 4818 m in the Early Cretaceous Ågard Formation. The well was drilled with Seawater/Native Solids mud down to the 13 3/8" casing point at 1523 m, with Seawater/Lignosulphonate from 1523 m to the 9 5/8" casing point at 3794 m, and with Calcium chloride/Sodium chloride XC polymer mud from 3794 m to TD.

Hydrocarbon shows were encountered in the Danian and Upper Cretaceous limestone. The porosity was poorly developed and testing verified the zones to be non-productive. Early Cretaceous had shows in limestones, claystones, shales, and marls, but no sandstones were found.

Thirteen conventional cores were cut continuously from 3182 m to 3402 m in the Ekofisk and Tor Formations Formations. Twenty-five RFT measurements were attempted in the gross interval 3823.8 - 4783.6 m. A fluid sample was obtained at 4587.9 m. It contained 50 ml formation water and 39 cubic feet (1.1 Sm3) gas.

The well was permanently abandoned on 12 July 1980 as a dry well with shows.

Testing

Two drill stem tests were conducted. DST 1 at 3279.7 to 3288.8 m in the Tor Formation produced 660 barrels (105 m3) of water /day, with traces of oil and gas. DST 2 from the intervals 3193.1 - 3199.8 and 3201.4 - 3215.4 m in the Ekofisk Formation produced 28.8 barrels (4.6 m3) water /day with no oil or gas before acid treatment. Well died completely after acid, with only a very weak flow of acid gas.

Cuttings available at the NPD

Interval [m]: 637.00 - 4817.00

Cores available at the NPD

Core length [m]: 185.26

Core number	Interval
1	10441-10501'
2	10501-10558.9'
3	10560-10619.6'
4	10621-10661.11'
5	10681-10729'
6	10730-10788'
7	10790-10841.6'
8	10843-10901.6'
9	10903-10908.6'
10	10921-10981'
11	10981-11038.6'
12	11041-11101'
13	11101-11161'
14	11163'-11172'

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]	Lot mud eqv. [g/cm³]
CONDUCTOR	30	139.0	36	140.0
SURF.COND.	20	587.0	26	605.0	1.53
INTERM.	13 3/8	1497.0	17 1/2	1513.0	2.04
INTERM.	9 5/8	3769.0	12 1/4	3788.0	2.09
LINER	7	4818.0	8 1/2	4818.0

Mud

Depth MD [m]	Mud weight [g/cm³]	Visc. [MPa.s]	Mud type	Date measured
627	1.13	80.0	WATER BASED	1980.07.12
1201	1.25	48.0	WATER BASED	1980.07.12
1538	1.37	34.0	WATER BASED	1980.07.12
2306	1.73	58.0	WATER BASED	1980.07.12
2561	1.72	47.0	WATER BASED	1980.07.12
2824	1.72	62.0	WATER BASED	1980.07.12
3201	1.70	60.0	WATER BASED	1980.07.12
3220	1.69	56.0	WATER BASED	1980.07.12
3432	1.49	58.0	WATER BASED	1980.07.12
4115	1.64	65.0	WATER BASED	1980.07.12
4674	1.78	55.0	WATER BASED	1980.07.12
4817	1.88	47.0	WATER BASED	1980.07.12

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	3254 - 3263					0
2.0	3168 - 3190					0

Drill Stem Test (recovery)

Test no.	Oil [Sm³/day]	Gas [Sm³/day]	Oil grav. [g/cm³]	Gas grav. rel.air	GOR [m³/m³]
1.0	0	0			0
2.0	0	0			0

Available logs

Log type	Intervals logged [m]
ISF BHC GR CAL SP	164 - 3814
DLL BHC GR SP	3793 - 4816
ML MLL	3791 - 4817
FDC CNL GR CAL	2834 - 4817
HDT	1524 - 3805
VELOCITY	625 - 4818

Lithostratigraphy

Top depth [m]	Litostratigraphic unit
96	NORDLAND GP
1714	HORDALAND GP
2995	ROGALAND GP
2995	BALDER FM
3012	SELE FM
3080	LISTA FM
3150	VÅLE FM
3182	SHETLAND GP
3182	EKOFISK FM
3264	TOR FM
3500	HOD FM
3967	BLODØKS FM
3975	HIDRA FM
4271	CROMER KNOLL GP
4271	RØDBY FM
4359	SOLA FM
4533	ÅSGARD FM

Composite log

No composite log presently available.

Geochemical information available at the NPD

No geochemical data presently available. Regional geochemical studies which include data from this well may however be filed on a different well.

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

2_7_16_Completion_Report	(Format:PDF. Size: 31.048 Mb )
2_7_16_Completion_log.1	(Format:PDF. Size: 3.016 Mb )

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Old NPD WDSS reports, NPD papers and other related documents

WDSS_General_Information	(Format:PDF. Size: 0.131 Mb )
WDSS_completion_log	(Format:PDF. Size: 0.280 Mb )

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