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Exploration wellbore: 6705/10-1

General information

NPDID wellbore: 6044
Well name: 6705/10-1
Drilling operator name: StatoilHydro ASA
Geodetic datum: ED50
Coordinates: 67° 0` 58.40`` N 5° 17` 47.80`` E
UTM coordinates: 7435225.68 N 600057.62 E
UTM zone: 31
Drilled in production licence: 327-B
Area: NORWEGIAN SEA
Discovery:6705/10-1
Field:NOT YET DEVELOPED
Drill permit: 1229-L
Drilling facility:TRANSOCEAN LEADER
Drilling days: 43
Wellbore entry date: 05.02.2009
Wellbore completion date: 19.03.2009
Original wellbore purpose: WILDCAT
Wellbore purpose: WILDCAT
Wellbore status: P&A
Wellbore contents: GAS
Discovery wellbore: YES
Formation/age with hydrocarbons 1:SPRINGAR FM / LATE CRETACEOUS
Seismic location: GRE02STR05,inline3790 & crossline 5216
Kelly bushing elevation (KB) [m]: 24
Water depth [m]: 1335
Total Depth (MD) [m]: 3775
Final vertical depth (TVD) [m]: 3774
Max inclination [°]: 2.40
Bottom hole temperature [°C]: 117
Oldest penetrated age: EARLY CRETACEOUS
Oldest penetrated formation: LANGE FM
Note: All depths, except the water depth, are relative to kelly bushing (RKB)

Wellbore history

General

The 6705/10-1 Asterix well is located in the Vøring Basin of the Norwegian Sea. It was drilled on a seismic flat spot on the Gjallar Ridge, anticipated to be a gas-water contact. The main objective was to prove hydrocarbons in reservoir of the Late Cretaceous age (Maastrichtian) Springar Formation. Expected hydrocarbon phase was dry gas similar to Luva (6707/10-1). The TD requirement for the well was to drill at least 50 m into Turonian aged rocks or minimum 3750 m TVDSS, whatever came first.

Operations and results

Wildcat well 6705/10-1 was spudded with the semi-submersible installation Transocean Leader on 5 February 2009 and drilled to TD at 3775 m in the Early Cretaceous Lange Formation. Due to obstruction in the well wire line logs were run only to 3712 m. Otherwise operations proceeded without significant problems. The well was drilled with seawater and hi-vis sweeps down to 2360 m and with Ultradril mud from 2360 m to TD.

Top Springar Formation was encountered at 3214 m with an 85 m column of dry gas. The gas/water contact was not possible to establish exactly, but is estimated to be in the interval 3302 to 3297 m. Weak oil shows were recorded in the interval 2865 to 2960 m.

Four cores were cut in the Springar Formation from 3226 to 3332.5 m. Core number four lost ca four meter (3309 to 3310 m) due to core erosion. MDT gas samples were taken at 3223.5 m and 3276 m. An MDT water sample was taken at 3301.5 m.

The well was permanently abandoned on 19 March 2009 as a gas discovery.

Testing

No drill stem test was performed.

Cuttings available at the NPD

Interval [m]: 2370.00 - 3775.00

Cores available at the NPD

Core length [m]: 101.11

Core number Interval
1 3226-3252.16
2 3252.16-3279.41
3 3279.5-3305.4
4 3305.5-3327.3

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 1447.0 36 1450.0
SURF.COND. 20 2350.0 26 2363.0 1.27
INTERM. 13 3/8 2896.0 17 1/2 2908.0 1.39
OPEN HOLE 3775.0 12 1/4 3775.0

Mud

Depth MD [m] Mud weight [g/cm3] Visc. [MPa.s] Yield [pnt Pa.] Mud type Date measured
1447 1.30 19.0 Ultradrill
1450 1.30 19.0 Ultradrill
1850 1.14 14.0 Ultradrill
2360 1.30 20.0 Ultradrill
2905 1.20 14.0 Ultradrill
2905 1.18 14.0 Ultradrill
3226 1.24 20.0 Ultradrill
3306 1.24 20.0 Ultradrill
3332 1.25 22.0 Ultradrill
3495 1.27 24.0 Ultradrill
3775 1.26 25.0 Ultradrill

Drill stem test

No drill stem test in this wellbore.

Available logs

Log type Intervals logged [m]
MWD - POWERPULSE 1358 - 1448
MWD - ARCVRES9 POWERPULSE 1448 - 2905
MWD - ARCVRES8 POWERPULSE 2905 - 3775
PEX HRLA IS PPC MSIP HNGS 2891 - 3712
MDT SP GR CMR 2315 - 3324
MDT MS PO SP PO QS LFA 3223 - 3324
MDT MS PO PO QS LFA 3301 - 3301
GR VSI 2369 - 3700

Lithostratigraphy

Top depth [m] Litostratigraphic unit
1358 NORDLAND GP
1358 NAUST FM
1525 KAI FM
2005 HORDALAND GP
2005 BRYGGE FM
2718 ROGALAND GP
2718 TARE FM
2922 TANG FM
3214 SHETLAND GP
3214 SPRINGAR FM
3403 NISE FM
3480 KVITNOS FM
3525 CROMER KNOLL GP
3525 LANGE 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)

No documents presently available.



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