Generated 11.02.2012
|
|
The NPD's Fact-pages |
|
|
Generated 11.02.2012 |
|
After more than 10 years as a fact provider NPDs FactPages version 1 will be shut down in Dec. 2011.
Start using FactPages version 2 now! See also FactPages version 2 Quick Reference' If you have any questions or comments please send an e-mail to FactWEB@npd.no. |
| NPDID wellbore: | 271 | |
| Well name: | 2/7-12 | |
| Drilling operator name: | Phillips Petroleum Company Norway | |
| Geodetic datum: | ED50 | |
| Coordinates: | 56° 29` 43.76`` N | 3° 0` 36.37`` E |
| UTM coordinates: | 6261367.67 N | 500622.03 E |
| UTM zone: | 31 | |
| Drilled in production licence: | 018 | |
| Area: | NORTH SEA | |
| Drill permit: | 208-L | |
| Drilling facility: | DYVI BETA | |
| Drilling days: | 45 | |
| Wellbore entry date: | 17.12.1978 | |
| Wellbore completion date: | 30.01.1979 | |
| Original wellbore purpose: | WILDCAT | |
| Wellbore purpose: | WILDCAT | |
| Wellbore status: | P&A | |
| Wellbore contents: | SHOWS | |
| Discovery wellbore: | NO | |
| Seismic location: | ||
| Kelly bushing elevation (KB) [m]: | 38 | |
| Water depth [m]: | 75 | |
| Total Depth (MD) [m]: | 1832 | |
| Final vertical depth (TVD) [m]: | ||
| Max inclination [°]: | ||
| Bottom hole temperature [°C]: | 88 | |
| Oldest penetrated age: | LATE PERMIAN | |
| Oldest penetrated formation: | ZECHSTEIN GP | |
| Note: All depths, except the water depth, are relative to kelly bushing (RKB) | ||
General
Wildcat well 2/7-12 was drilled on an intrusive salt plug in the upper left corner of the block, some km west of the Ekofisk and Edda fields in the Southern Norwegian North Sea. The salt plug is located in the cross-junction between the four blocks 1/6, 1/9, 2/4, and 2/7. The objective was to establish if Danian - Late Cretaceous carbonates were present on the salt plug. If present the carbonates would be evaluated.
Operations and results
Well 2/7-12 was spudded with the semi-submersible installation Dyvi Beta on 17 December 1978 and drilled to TD at 1832 m in the Late Permian Zechstein Group. The well was drilled with salt-based mud, possibly with some diesel addition according to geochemical analyses, in the interval from 1402 m to TD. Several thin gas charged siltstone stringers were penetrated between 433 m and 835 m.
The salt (Permian Zechstein Group) was encountered at 1686 m. The well did not encounter any Danian -Late Cretaceous carbonates on top of the salt. Oil shows (fluorescence, cut, stain or combinations) were recorded on SWC's and cuttings at 114.5 - 445 m (sandstone), 731 - 810 m (claystone with trace of fine sandstone), and scattered on claystone, shale, and limestone from 1469 m to 1679 m. The resistivity log indicated a probable hydrocarbon zone from 416 to 433 m in a shallow sand. It was not possible to calculate reliable porosity from the sonic log, but a DST confirmed minor amounts of oil.
Ninety sidewall cores were attempted and seventy-one were recovered from the overall interval 1417.3 to 173.7 m. No conventional cores were cut and no wire line fluid samples taken in this well.
The well was permanently abandoned on 30 January 1979 as a dry well with shows.
Testing
One drill stem test was performed through perforations at 416.7 - 425.8 m. The tool was open 22 minutes; shut in one hour and 58 minutes, open 3 hours and shut in 3 hours and 58 minutes. No gas came to surface. Reversed out and recovered approximately 5 barrels of fluid, consisting of 31% sediments, 43% water (2.15 barrels) and 26% oil - oil emulsion (1.3 barrels).
Interval [m]: 341.00 - 1831.00
No cores in this wellbore.
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 | 175.0 | 36 | 175.0 | |
| SURF.COND. | 20 | 335.0 | 26 | 341.0 | 1.63 |
| INTERM. | 13 3/8 | 1402.0 | 17 1/2 | 1412.0 | 1.66 |
| OPEN HOLE | 1832.0 | 12 1/4 | 1832.0 |
| Depth MD [m] | Mud weight [g/cm3] | Visc. [MPa.s] | Yield [pnt Pa.] | Mud type | Date measured |
|---|---|---|---|---|---|
| 439 | 1.08 | 50.0 | waterbased | ||
| 980 | 1.28 | 48.0 | waterbased | ||
| 1412 | 1.55 | 59.0 | waterbased | ||
| 1746 | 1.78 | 59.0 | waterbased | ||
| 1882 | 1.78 | 61.0 | waterbased |
| 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 | 417 - 426 | 25.4 | 0 |
| Test no. | Oil [Sm3/day] | Gas [Sm3/day] | Oil grav. [g/cm3] | Gas grav. rel.air | GOR [m3/m3] |
|---|---|---|---|---|---|
| 1.0 | 0 | 0 | 0 |
| Log type | Intervals logged [m] |
|---|---|
| ISF SONIC GR SP | 332 - 1835 |
| DLL MSFL GR SP CAL | 1402 - 1835 |
| FDC CNL GR CAL | 1402 - 1835 |
| HDT | 1402 - 1835 |
| VELOCITY | 332 - 1835 |
| Top depth [m] | Litostratigraphic unit |
|---|---|
| 110 | NORDLAND GP |
| 1382 | HORDALAND GP |
| 1679 | ROGALAND GP |
| 1686 | ZECHSTEIN GP |
No composite log presently available.
| File 1 | (Format:PDF. Size: 0.767 Mb ) |
|
You need an ACROBAT reader from ADOBE to display the reports in pdf format. |
| 2_7_12_Completion_Report_and_Completion_log | (Format:PDF. Size: 12.626 Mb ) |
|
|
You need an ACROBAT reader from ADOBE to display the reports in pdf format. |
| WDSS_General_Information | (Format:PDF. Size: 0.109 Mb ) |
|
|
You need an ACROBAT reader from ADOBE to display the reports in pdf format. |
