Generated 09.09.2010
|
|
The NPD's Fact-pages |
|
|
Generated 09.09.2010 |
| NPDID wellbore: | 4745 | |
| Well name: | 24/6-4 | |
| Drilling operator name: | Marathon Petroleum Norge AS | |
| Geodetic datum: | ED50 | |
| Coordinates: | 59° 34` 44.70`` N | 1° 54` 46.08`` E |
| UTM coordinates: | 6605192.14 N | 438588.58 E |
| UTM zone: | 31 | |
| Drilled in production licence: | 088-BS | |
| Area: | NORTH SEA | |
| Discovery: | 24/6-4 ALVHEIM | |
| Field: | ALVHEIM | |
| Drill permit: | 1059-L | |
| Drilling facility: | DEEPSEA BERGEN | |
| Drilling days: | 42 | |
| Wellbore entry date: | 22.04.2003 | |
| Wellbore completion date: | 02.06.2003 | |
| Original wellbore purpose: | APPRAISAL | |
| Wellbore purpose: | WILDCAT | |
| Wellbore status: | P&A | |
| Wellbore contents: | OIL/GAS | |
| Discovery wellbore: | YES | |
| Formation/age with hydrocarbons 1: | HEIMDAL FM / PALEOCENE | |
| Seismic location: | line 484 & trace 4798- NH 9601 | |
| Kelly bushing elevation (KB) [m]: | 23 | |
| Water depth [m]: | 119 | |
| Total Depth (MD) [m]: | 2325 | |
| Final vertical depth (TVD) [m]: | 2319 | |
| Max inclination [°]: | 11.60 | |
| Bottom hole temperature [°C]: | 73 | |
| Oldest penetrated age: | PALEOCENE | |
| Oldest penetrated formation: | HEIMDAL FM | |
| Note: All depths, except the water depth, are relative to kelly bushing (RKB) | ||
General
Well 24/6-4 (Boa) was originally spudded as 24/6-3, which was junked for technical reasons. The well was designed to appraise the Kameleon 24/6-2 discovery made in 1998. The well objectives were: to verify the field wide extent of fluid and gas contacts, eliminate geologic risk associated with the Boa structure, provide additional time-depth control, provide gas, oil and water samples, and to test local stratigraphic control of the T57 shale horizon.
Operations and results
Well 24/6-4 was spudded 22 April 2003 with the semi-submersible installation Deepsea Bergen. The well was drilled to 1329 m when hole problems occurred and a technical sidetrack (24/6-4 T2) was decided. The sidetrack was kicked off at 1010 m and drilled slightly deviated to 1340 m (maximum deviation was 11.6&) where a vertical path was re-established. The well was ten drilled as planned to TD at 2325 m in the Paleocene Heimdal Formation. Water based bentonite mud spotted with KCl mud was used in the first well bore down to 1329 m. The sidetrack was drilled with oil-based mud.
Apart from the target Heimdal Formation the only sandy formation penetrated was the Grid Formation from 1147 m to 1301 m. The Heimdal Sandstone was encountered at 2123 m and proved to be both gas and oil-bearing with a gas-oil contact (GOC) at 2147.7 m MD (2118.5 m TVD SS) and an oil-water contact (OWC) at 2176.3 m (2147.1 m TVD SS). This was consistent with shows described from core and cuttings within the Heimdal. No shows were recorded below 2177 m, apart from a possible trace of residual oil, at 2315 m. The GOC in 24/6-2 (Kameleon) was found at 2125 m TVD SS, ca 5 m deeper than in 24/6-4, and the OWC in 24/6-2 was found at 2143 m TVD SS, ca 4 m higher than in 24/6-4. Formation pressure measurements in the two wells showed 2 bars lower pressure in the 24/6-2 hydrocarbon column than in the 24/6-4 HC column. Communication between the two wells was thus found to be unlikely.
A total of 54.65 m of core was cut in two cores in the Heimdal formation, with 99.3% recovery. Coring point was at 2124 m, determined by cuttings and drilling parameter changes. A total of 32 MDT formation pressures were obtained in 39 attempts from 2125.0 m to 2276.0 m. A total of 23 MDT fluid samples, 10 gas samples from 2138 m and 13 oil samples from 2162 m, were obtained.
The well was permanently abandoned as a gas and oil discovery on 24 March 1969.
Testing
No drill stem test was performed.
Interval [m]: 1510.00 - 2325.00
Core length [m]: 54.29
| Core number | Interval |
|---|---|
| 1 | 2124-2151.65 |
| 2 | 2151.65-2178.29 |
No scanned core photos available
No palynological slides in this wellbore.
No oil samples available.
| Type | Casing diam. [inch] | Depth below KB [m] | Hole diam. [inch] | Hole depth below KB [m] | Lot mud eqv. [g/cm3] |
|---|---|---|---|---|---|
| CONDUCTOR | 30 | 205.0 | 36 | 207.0 | |
| SURF.COND. | 13 3/8 | 760.0 | 17 1/2 | 1329.0 | |
| INTERM. | 9 5/8 | 987.0 | 12 1/4 | 1344.0 | |
| OPEN HOLE | 2325.0 | 8 1/2 | 2325.0 |
| Depth MD [m] | Mud weight [g/cm3] | Visc. [MPa.s] | Yield [pnt Pa.] | Mud type | Date measured |
|---|---|---|---|---|---|
| 207 | 1.20 | 26.0 | BENTONITE MUD | ||
| 268 | 1.20 | 26.0 | BENTONITE MUD | ||
| 769 | 1.20 | 27.0 | BENTONITE MUD | ||
| 813 | 1.28 | 22.0 | OIL (ENVIRON) | ||
| 987 | 1.22 | 16.0 | KCL | ||
| 1095 | 1.25 | 18.0 | OIL (ENVIRON) | ||
| 1329 | 1.20 | 33.0 | BENTONITE MUD | ||
| 1340 | 1.28 | 31.0 | OIL (ENVIRON) | ||
| 1345 | 1.20 | 29.0 | KCL 4% | ||
| 1780 | 1.28 | 20.0 | OIL (ENVIRON) | ||
| 2124 | 1.28 | 22.0 | OIL (ENVIRON) | ||
| 2325 | 1.28 | 21.0 | OIL (ENVIRON) |
No drill stem test in this wellbore.
| Log type | Intervals logged [m] |
|---|---|
| LWD - EWR-4 GR SLD CTN BAT | 1873 - 2325 |
| PEX HNGS | 987 - 1019 |
| PEX HNGS DSI | 1129 - 1198 |
| MDT GR | 2125 - 2276 |
| MDT GR | 2138 - |
| PEX HNGS DSI ACTS | 1129 - 2295 |
| VSI GR | 1129 - 2295 |
| DSI GR | 1129 - 2305 |
| Top depth [m] | Litostratigraphic unit |
|---|---|
| 144 | NORDLAND GP |
| 346 | UTSIRA FM |
| 884 | HORDALAND GP |
| 1148 | GRID FM |
| 1301 | HORDALAND GP |
| 1925 | ROGALAND GP |
| 1925 | BALDER FM |
| 2049 | SELE FM |
| 2070 | LISTA FM |
| 2123 | HEIMDAL FM |
|
Composite log (Format:PDF. Size: 0.175 Mb) |
|
|
You need an ACROBAT reader from ADOBE to display the reports in pdf format. |
No geochemical data presently available. Regional geochemical studies which include data from this well may however be filed on a different well.
No documents presently available.
