- General information
Wellbore name
6608/8-1
Type
EXPLORATION
Purpose
WILDCAT
Status
P&A
Factmaps in new window
Main area
NORWEGIAN SEA
Well name
6608/8-1
Seismic location
3D ST 9405 INLINE 1283& CROSSLINE 1000
Drilled in production licence
Drilling operator
Den norske stats oljeselskap a.s
Drill permit
873-L
Drilling facility
Drilling days
58
Entered date
01.02.1997
Completed date
30.03.1997
Release date
30.03.1999
Publication date
15.11.2001
Purpose - planned
WILDCAT
Reentry
NO
Content
OIL SHOWS
Discovery wellbore
NO
Kelly bushing elevation [m]
23.0
Water depth [m]
334.0
Total depth (MD) [m RKB]
3013.0
Final vertical depth (TVD) [m RKB]
3005.0
Bottom hole temperature [°C]
108
Oldest penetrated age
LATE PERMIAN
Oldest penetrated formation
ZECHSTEIN GP
Geodetic datum
ED50
NS degrees
66° 18' 32.69'' N
EW degrees
8° 30' 58.84'' E
NS UTM [m]
7354632.57
EW UTM [m]
478313.59
UTM zone
32
NPDID wellbore
2974
 
 
- Wellbore history
General
The main objective for the well was to test the hydrocarbon potential in the Permian carbonates, which was an unproven play type in this area. Secondary objectives were to test possible Pliocene Kai Formation sandstone near the prognosed pinch-out, possible Paleocene sandstone, Triassic sandstones, and Permian sandstone/weathered basement.
Operations and results
The well was drilled vertically using a water based mud to 3013 m RKB where massive losses occurred. It was not possible to stabilize the well, and it was plugged back permanently. The well was classified as a dry well. Traces of oil shows were however reported during drilling in the uppermost part of the Triassic succession. High gas readings that probably originated from TD were recorded during circulation to stabilize the well. Two cores were cut from 1833 to 1843 m RKB in Triassic and another two from 2766 to 2795 m in Permian. An FMT fluid sample from 1832 m RKB contained mainly mud filtrate and only trace hydrocarbon gases.
Testing
No drill stem test was performed
 
 
- Cuttings at the NPD
Cutting sample, top depth [m]
Cutting samples, bottom depth [m]
670.00
2999.00
Cuttings available for sampling?
YES
 
 
- Cores at the NPD
Core sample number
Core sample - top depth
Core sample - bottom depth
Core sample depth - uom
1
1833.0
1833.4
[m ]
2
1834.0
1842.8
[m ]
3
2766.0
2767.8
[m ]
4
2768.0
2774.8
[m ]
Total core sample length [m]
17.8
Cores available for sampling?
YES
 
 
- Core photos
Click to enlarge the pictureClick to enlarge the pictureClick to enlarge the pictureClick to enlarge the pictureClick to enlarge the picture
1833-1834m
1834-1839m
1839-1842m
2766-2767m
2768-2773m
     
Click to enlarge the pictureClick to enlarge the pictureClick to enlarge the pictureClick to enlarge the pictureClick to enlarge the picture
2773-2774m
    
     
 
 
- Palynological slides at the NPD
Sample depth
Depth unit
Sample type
Laboratory
670.0
[m]
DC
RRI
700.0
[m]
DC
RRI
760.0
[m]
DC
RRI
800.0
[m]
DC
RRI
820.0
[m]
DC
RRI
850.0
[m]
DC
RRI
860.0
[m]
DC
RRI
890.0
[m]
DC
RRI
920.0
[m]
DC
RRI
950.0
[m]
DC
RRI
990.0
[m]
DC
RRI
1020.0
[m]
DC
RRI
1030.0
[m]
DC
RRI
1060.0
[m]
DC
RRI
1100.0
[m]
DC
RRI
1130.0
[m]
DC
RRI
1150.0
[m]
DC
RRI
1170.0
[m]
DC
RRI
1180.0
[m]
DC
RRI
1200.0
[m]
DC
RRI
1230.0
[m]
DC
RRI
1260.0
[m]
DC
RRI
1290.0
[m]
DC
RRI
1410.0
[m]
DC
RRI
1450.0
[m]
DC
RRI
1490.0
[m]
DC
RRI
1550.0
[m]
DC
RRI
1560.0
[m]
DC
RRI
1580.0
[m]
DC
RRI
1691.0
[m]
DC
RRI
1711.0
[m]
DC
RRI
1776.0
[m]
DC
RRI
1786.0
[m]
DC
RRI
1834.6
[m]
C
WESTL
1837.0
[m]
C
WESTL
1840.0
[m]
C
WESTL
1842.6
[m]
C
WESTL
1885.0
[m]
DC
RRI
1895.0
[m]
DC
RRI
1955.0
[m]
DC
RRI
2465.0
[m]
DC
RRI
2474.0
[m]
DC
RRI
2483.0
[m]
DC
RRI
2492.0
[m]
DC
RRI
2501.0
[m]
DC
RRI
2510.0
[m]
DC
RRI
2519.0
[m]
DC
RRI
2528.0
[m]
DC
RRI
2549.0
[m]
DC
RRI
2558.0
[m]
DC
RRI
2567.0
[m]
DC
RRI
2576.0
[m]
DC
RRI
2585.0
[m]
DC
RRI
2766.2
[m]
C
WESTL
2768.6
[m]
C
WESTL
2770.8
[m]
C
WESTL
2772.7
[m]
C
WESTL
2774.5
[m]
C
WESTL
 
 
- Lithostratigraphy
 
 
- Composite logs
Document name
Document format
Document size [KB]
pdf
0.27
 
 
- Geochemical information
Document name
Document format
Document size [KB]
pdf
1.66
 
 
- Documents - reported by the production licence (period for duty of secrecy expired)
Document name
Document format
Document size [KB]
pdf
8.67
pdf
58.16
 
 
- Logs
Log type
Log top depth [m]
Log bottom depth [m]
DLL MLL MAC DSL CHT
357
1550
DLL MLL MAC DSL CHT
1475
2560
DPR
358
3013
FMT GR
1600
2395
SWC
652
1550
SWC GR
1567
2560
VSP GR
1000
2380
ZDL CND DSL CHT
652
1550
ZDL CND DSL CHT
1544
2560
 
 
- Casing and leak-off tests
Casing type
Casing diam.
[inch]
Casing depth
[m]
Hole diam.
[inch]
Hole depth
[m]
LOT mud eqv.
[g/cm3]
Formation test type
CONDUCTOR
30
418.0
36
418.0
0.00
LOT
SURF.COND.
20
652.0
26
659.0
1.39
LOT
INTERM.
13 3/8
1544.0
17 1/2
1624.0
1.72
LOT
LINER
9 5/8
2585.0
12 1/4
2587.0
1.71
LOT
OPEN HOLE
3013.0
8 1/2
3013.0
0.00
LOT
 
 
 
- Drilling mud
Depth MD [m]
Mud weight [g/cm3]
Visc. [mPa.s]
Yield point [Pa]
Mud type
Date measured
957
1.20
  
WATER BASED
 
1222
1.03
  
WATER BASED
 
2337
1.30
23.0
 
WATER BASED
 
2667
1.34
24.0
 
WATER BASED
 
2785
1.34
22.0
 
WATER BASED
 
2900
1.34
21.0
 
WATER BASED