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Generated 08.02.2012 |
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| NPDID wellbore: | 6034 | |
| Well name: | 30/9-22 | |
| Drilling operator name: | StatoilHydro Petroleum AS | |
| Geodetic datum: | ED50 | |
| Coordinates: | 60° 17` 31.78`` N | 2° 42` 05.84`` E |
| UTM coordinates: | 6684143.45 N | 483503.35 E |
| UTM zone: | 31 | |
| Drilled in production licence: | 104 | |
| Area: | NORTH SEA | |
| Discovery: | 30/9-22 STJERNE | |
| Field: | OSEBERG SØR | |
| Drill permit: | 1226-L | |
| Drilling facility: | POLAR PIONEER | |
| Drilling days: | 41 | |
| Wellbore entry date: | 29.01.2009 | |
| Wellbore completion date: | 10.03.2009 | |
| Original wellbore purpose: | WILDCAT | |
| Wellbore purpose: | WILDCAT | |
| Wellbore status: | P&A | |
| Wellbore contents: | OIL/GAS | |
| Discovery wellbore: | YES | |
| Formation/age with hydrocarbons 1: | INTRA HEATHER FM SS / LATE JURASSIC | |
| Formation/age with hydrocarbons 2: | TARBERT FM / MIDDLE JURASSIC | |
| Seismic location: | inline3401 & crossline 6973(NH05-M01-Full 3D cube) | |
| Kelly bushing elevation (KB) [m]: | 23 | |
| Water depth [m]: | 95 | |
| Total Depth (MD) [m]: | 3255 | |
| Final vertical depth (TVD) [m]: | 3254 | |
| Max inclination [°]: | 4.00 | |
| Bottom hole temperature [°C]: | 117 | |
| Oldest penetrated age: | MIDDLE JURASSIC | |
| Oldest penetrated formation: | DRAKE FM | |
| Note: All depths, except the water depth, are relative to kelly bushing (RKB) | ||
General
Well 30/9-22 (Katla) was drilled on the edge of the Horda Platform in the northern part of the Viking Graben, south of the Oseberg S&r field. The objective was to prove the presence of commercial hydrocarbons in the Middle Jurassic Tarbert Formation and to collect all data needed to assess the development of the prospect.
Operations and results
Wildcat well 30/9-22 was spudded with the semi-submersible installation Polar Pioneer on 29 January 2009 and drilled to TD at 3255 m in the Early Jurassic Dunlin Group. No shallow gas was observed by the ROV at the wellhead or by the MWD while drilling the 26" hole or the 17 1/2" hole. No significant problems occurred in the operations. The well was drilled with seawater and CaCl2 /polymer down to 339 m and with Glydril water based mud from 339 m to TD.
The well penetrated rocks of Quaternary, Tertiary, Cretaceous, and Jurassic age. The Heather Formation (Intra-Heather Formation Sandstone) was encountered at 2828 m, 44 m shallower than prognosed. The Tarbert Formation was encountered at 2866 m, 55 m shallower than prognosed. The Intra Heather Formation sandstone was gas filled, and the Tarbert Formation sandstone contained both gas and oil. Pressure measurements indicated a higher gas gradient and a pressure regime that was ca one bar lower in the Intra-Heather reservoir compared to the Tarbert Formation. The Tarbert Formation had a gas-oil contact at 2874 m and an oil-water contact at 2911 m. No oil shows were recorded outside of the target reservoir sections.
Two cores were cut; the first one started in the Heather Formation and continued in the Tarbert Formation, core #2 was cut in the Tarbert Formation only. MDT fluid samples were collected in the Intra-Heather sandstone at 2829.9 m (gas), and in the Tarbert Formation at 2867.9 m (gas), 2893.5 m (oil), and 2920.8 m (water)
The well was permanently abandoned on 10 March 2009 as an oil and gas discovery.
Testing
Interval [m]: 340.00 - 3255.00
Core length [m]: 108.57
| Core number | Interval |
|---|---|
| 1 | 2841-2895.4 |
| 2 | 2895.5-2949.67 |
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 | 180.0 | 36 | 183.0 | |
| SURF.COND. | 20 | 336.0 | 26 | 339.0 | 1.71 |
| INTERM. | 13 3/8 | 1460.0 | 17 1/2 | 1465.0 | 1.82 |
| INTERM. | 9 5/8 | 2768.0 | 12 1/2 | 2770.0 | 1.94 |
| OPEN HOLE | 3255.0 | 8 1/2 | 3255.0 |
| Depth MD [m] | Mud weight [g/cm3] | Visc. [MPa.s] | Yield [pnt Pa.] | Mud type | Date measured |
|---|---|---|---|---|---|
| 478 | 1.25 | 17.0 | Glydril | ||
| 867 | 1.25 | 19.0 | Glydril | ||
| 1376 | 1.25 | 16.0 | Glydril | ||
| 1512 | 1.45 | 11.0 | Glydril | ||
| 1919 | 1.45 | 20.0 | Glydril | ||
| 2685 | 1.46 | 23.0 | Glydril | ||
| 2770 | 1.45 | 24.0 | Glydril | ||
| 2779 | 1.25 | 14.0 | Glydril | ||
| 2852 | 1.45 | 24.0 | Glydril | ||
| 2971 | 1.25 | 16.0 | Glydril | ||
| 3255 | 1.25 | 16.0 | Glydril |
No drill stem test in this wellbore.
| Log type | Intervals logged [m] |
|---|---|
| MWD LWD - POWERPULSE | 117 - 183 |
| MWD LWD - POWERPULSE ARCVISION9 | 183 - 1465 |
| MWD LWD - TELESCOPE ARCVISION8 | 1465 - 2770 |
| MWD LWD - ARC & GEOVISION6 | 2770 - 3255 |
| PEX HRLA MSIP | 2705 - 3248 |
| VSI ZOVSP | 650 - 3248 |
| MDT PRESSURE | 2829 - 3032 |
| MDT SAMPLE | 2829 - 3032 |
| Top depth [m] | Litostratigraphic unit |
|---|---|
| 118 | NORDLAND GP |
| 688 | UTSIRA FM |
| 864 | HORDALAND GP |
| 2139 | ROGALAND GP |
| 2139 | BALDER FM |
| 2197 | SELE FM |
| 2255 | LISTA FM |
| 2345 | VÅLE FM |
| 2430 | SHETLAND GP |
| 2430 | HARDRÅDE FM |
| 2678 | KYRRE FM |
| 2749 | CROMER KNOLL GP |
| 2749 | SOLA FM |
| 2758 | ÅSGARD FM |
| 2790 | VIKING GP |
| 2790 | DRAUPNE FM |
| 2830 | HEATHER FM |
| 2867 | BRENT GP |
| 2867 | TARBERT FM |
| 2995 | NESS FM |
| 3205 | DUNLIN GP |
| 3205 | DRAKE FM |
No composite log presently available.
| 30_9_22_gch_transfer_1 | (Format:TXT. Size: 0.000 Mb ) |
| 30_9_22_gch_results_1 | (Format:TXT. Size: 0.386 Mb ) |
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