Generated 11.02.2012
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Generated 11.02.2012 |
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| NPDID wellbore: | 3573 | |
| Well name: | 2/7-31 | |
| Drilling operator name: | Phillips Petroleum Company Norway | |
| Geodetic datum: | ED50 | |
| Coordinates: | 56° 20` 12.40`` N | 3° 5` 15.40`` E |
| UTM coordinates: | 6243705.05 N | 505416.77 E |
| UTM zone: | 31 | |
| Drilled in production licence: | 018 | |
| Area: | NORTH SEA | |
| Discovery: | 2/7-31 | |
| Field: | NOT YET DEVELOPED | |
| Drill permit: | 943-L | |
| Drilling facility: | MÆRSK GALLANT | |
| Drilling days: | 148 | |
| Wellbore entry date: | 13.01.1999 | |
| Wellbore completion date: | 09.06.1999 | |
| Original wellbore purpose: | WILDCAT | |
| Wellbore purpose: | WILDCAT | |
| Wellbore status: | SUSPENDED | |
| Wellbore contents: | OIL | |
| Discovery wellbore: | YES | |
| Formation/age with hydrocarbons 1: | TUXEN FM / EARLY CRETACEOUS | |
| Formation/age with hydrocarbons 2: | ULA FM / LATE JURASSIC | |
| Formation/age with hydrocarbons 3: | ROTLIEGEND GP / EARLY PERMIAN | |
| Seismic location: | BPN 9102-163 2& SP 982 | |
| Kelly bushing elevation (KB) [m]: | 48 | |
| Water depth [m]: | 73 | |
| Total Depth (MD) [m]: | 4968 | |
| Final vertical depth (TVD) [m]: | 4966 | |
| Max inclination [°]: | 6.90 | |
| Bottom hole temperature [°C]: | 176 | |
| Oldest penetrated age: | EARLY PERMIAN | |
| Oldest penetrated formation: | ROTLIEGEND GP | |
| Note: All depths, except the water depth, are relative to kelly bushing (RKB) | ||
The objectives of drilling the 2/7-31 Ebba Prospect well were to test the hydrocarbon potential of the Permian Rotliegend and Jurassic Lower Ula sandstones in a fault closed structural trap. The prospect was located 10 km west of the Embla field and 1 km west of the Phillips 2/7-19 well, which tested hydrocarbons in the Jurassic Lower Ula Formation. Further, the well should establish proven economic reserves and obtain open hole wire line logs, cores and production tests in both formations.
Operations and results
Well 2/7-31 was spudded with the jack-up rig "Mærsk Galant" on 13 January 1999 and drilling was completed on 5 May 1999 at 4968 m in the Permian Rotliegend Group. It was drilled with spud mud down to 593 m and with oil based Versaport mud from 593 to TD.
Hydrocarbons were encountered first in the Lower Cretaceous Tuxen Formation (Top 4372.1 m), then in the sandstones of the Jurassic Lower Ula (Top 4483.6 m) and Bryne (Top 4634.2 m) Formations, and finally in the sandstone of the Permian Rotliegend Group (Top 4750m). All zones were evaluated either by MWD/LWD log or open and cased hole wire line data. Wire line formation pressure tests were taken throughout the Rotliegend section and oil samples were recovered from two FMT tests at 4793 m and 4812 m. Planned coring of the Jurassic sandstones was cancelled due to operational difficulties in the HPHT environment encountered in this well. Coring in the Rotliegend faced a similar fate but the setting of a liner stabilized the well and one core was taken from the interval 4795.7 - 4798.2 m and three in the interval 4811.3 - 4850.9 m. The well was suspended as an oil discovery.
A DST was performed over the Ula Sandstone interval 4565.9 - 4623.8 m. The well flowed at an average stabilized rate of 283 Sm3 oil and 120000 Sm3 gas on a 16/64" choke.
Interval [m]: 466.00 - 4968.00
Core length [m]: 41.30
| Core number | Interval |
|---|---|
| 1 | 15734`0-15741`6 |
| 2 | 15785`0-15877`6 |
| 3 | 15877`6-15905`6 |
| 4 | 15908`0-15915`3 |
 15734-15791ft |
 15791-15806ft |
 15806-15821ft |
 15821-15836ft |
 15836-15851ft |
 15851-15866ft |
 15866-15880ft |
 15880-15895ft |
 15895-15911ft |
 15911-15915ft |
No palynological slides in this wellbore.
| Test type: | Bottle test number: | Bottle interval [m]: | Fluid type: | Test date and time: |
|---|---|---|---|---|
| DST | DST1 | 0.000 - 0.000 | 1999.05.23 00:23 |
| Type | Casing diam. [inch] | Depth below KB [m] | Hole diam. [inch] | Hole depth below KB [m] | Lot mud eqv. [g/cm3] |
|---|---|---|---|---|---|
| CONDUCTOR | 30 | 222.5 | 36 | 225.0 | |
| SURF.COND. | 20 | 584.3 | 26 | 586.0 | |
| INTERM. | 13 3/8 | 1946.8 | 17 1/2 | 1950.0 | 1.67 |
| INTERM. | 9 7/8 | 4253.8 | 12 1/4 | 4255.0 | 1.95 |
| LINER | 7 3/4 | 4968.0 | 8 1/2 | 4968.0 | 2.15 |
| Depth MD [m] | Mud weight [g/cm3] | Visc. [MPa.s] | Yield [pnt Pa.] | Mud type | Date measured |
|---|---|---|---|---|---|
| 134 | 1.03 | 12.0 | BENTONITE | ||
| 227 | 1.26 | 15.0 | BENTONITE | ||
| 253 | 1.14 | 6.0 | BENTONITE | ||
| 584 | 1.13 | 8.0 | BENTONITE | ||
| 649 | 1.43 | 29.0 | VERSAPORT | ||
| 1005 | 1.43 | 23.0 | VERSAPORT | ||
| 1574 | 1.43 | 21.0 | VERSAPORT | ||
| 1798 | 1.56 | 25.0 | VERSAPORT | ||
| 1946 | 1.67 | 22.0 | VERSAPORT | ||
| 1950 | 1.56 | 24.0 | VERSAPORT | ||
| 2051 | 1.67 | 24.0 | VERSAPORT | ||
| 2350 | 1.67 | 25.0 | VERSAPORT | ||
| 2934 | 1.70 | 24.0 | VERSAPORT | ||
| 3186 | 1.67 | 20.0 | VERSAPORT | ||
| 3206 | 1.67 | 22.0 | VERSAPORT | ||
| 3536 | 1.67 | 22.0 | VERSAPORT | ||
| 3827 | 1.67 | 24.0 | VERSAPORT | ||
| 3895 | 1.67 | 25.0 | VERSAPORT | ||
| 3899 | 1.67 | 25.0 | VERSAPORT | ||
| 3995 | 2.16 | 90.0 | VERSAPORT | ||
| 4020 | 2.16 | 91.0 | VERSAPORT | ||
| 4045 | 1.67 | 28.0 | VERSAPORT | ||
| 4164 | 1.71 | 29.0 | VERSAPORT | ||
| 4166 | 2.12 | 46.0 | VERSAPORT | ||
| 4225 | 1.80 | 34.0 | VERSAPORT | ||
| 4232 | 1.80 | 38.0 | VERSAPORT | ||
| 4243 | 1.82 | 32.0 | VERSAPORT | ||
| 4244 | 1.80 | 33.0 | VERSAPORT | ||
| 4251 | 1.80 | 27.0 | VERSAPORT | ||
| 4258 | 1.80 | 32.0 | VERSAPORT | ||
| 4369 | 2.16 | 82.0 | VERSAPORT | ||
| 4372 | 2.00 | 38.0 | VERSAPORT | ||
| 4382 | 2.12 | 46.0 | VERSAPORT | ||
| 4407 | 2.12 | 42.0 | VERSAPORT | ||
| 4448 | 2.12 | 44.0 | VERSAPORT | ||
| 4477 | 2.12 | 43.0 | VERSAPORT | ||
| 4510 | 2.12 | 47.0 | VERSAPORT | ||
| 4539 | 2.14 | 45.0 | VERSAPORT | ||
| 4541 | 2.16 | 49.0 | VERSAPORT | ||
| 4545 | 2.16 | 49.0 | VERSAPORT | ||
| 4599 | 2.16 | 48.0 | VERSAPORT | ||
| 4671 | 2.16 | 50.0 | VERSAPORT | ||
| 4686 | 2.16 | 49.0 | VERSAPORT | ||
| 4704 | 2.06 | 49.0 | VERSAPORT | ||
| 4721 | 2.14 | 51.0 | VERSAPORT | ||
| 4754 | 2.16 | 50.0 | VERSAPORT | ||
| 4756 | 2.16 | 52.0 | VERSAPORT | ||
| 4758 | 2.16 | 57.0 | VERSAPORT | ||
| 4763 | 2.16 | 51.0 | VERSAPORT | ||
| 4775 | 2.06 | 43.0 | VERSAPORT | ||
| 4781 | 2.06 | 42.0 | VERSAPORT | ||
| 4795 | 2.10 | 47.0 | VERSAPORT | ||
| 4797 | 2.06 | 41.0 | VERSAPORT | ||
| 4811 | 2.06 | 45.0 | VERSAPORT | ||
| 4839 | 2.06 | 48.0 | VERSAPORT | ||
| 4848 | 2.06 | 48.0 | VERSAPORT | ||
| 4850 | 2.06 | 49.0 | VERSAPORT | ||
| 4925 | 2.06 | 52.0 | VERSAPORT | ||
| 4968 | 1.70 | BRINE | |||
| 4968 | 2.16 | 81.0 | VERSAPORT |
| 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 | 4623 - 4565 | 6.3 | 163 |
| Test no. | Oil [Sm3/day] | Gas [Sm3/day] | Oil grav. [g/cm3] | Gas grav. rel.air | GOR [m3/m3] |
|---|---|---|---|---|---|
| 1.0 | 282 | 120360 | .702 | 426 |
| Log type | Intervals logged [m] |
|---|---|
| ISF LSS GR | 157 - 770 |
| MWD CDR ADN DIR | 4258 - 4968 |
| HDIL MAC ZDL GR | 1943 - 4230 |
| HDIL XMAC GR | 4763 - 4849 |
| HDIL XMAC CN GR | 4763 - 4965 |
| ZDL CN XMAC GR | 4763 - 4849 |
| ZDL CN GR | 4763 - 4967 |
| CBIL HDIP GR | 4763 - 4849 |
| MRIL | 4774 - 4854 |
| SBT | 1993 - 4229 |
| FMT | 3157 - 4198 |
| FMT | 4783 - 4937 |
| VSP | 152 - 4846 |
| SWC | 4778 - 4954 |
| Top depth [m] | Litostratigraphic unit |
|---|---|
| 121 | NORDLAND GP |
| 1541 | HORDALAND GP |
| 3000 | ROGALAND GP |
| 3000 | BALDER FM |
| 3018 | SELE FM |
| 3072 | LISTA FM |
| 3115 | VÅLE FM |
| 3146 | SHETLAND GP |
| 3146 | EKOFISK FM |
| 3203 | TOR FM |
| 3580 | HOD FM |
| 4074 | BLODØKS FM |
| 4087 | HIDRA FM |
| 4204 | CROMER KNOLL GP |
| 4204 | RØDBY FM |
| 4284 | SOLA FM |
| 4372 | TUXEN FM |
| 4379 | ÅSGARD FM |
| 4437 | TYNE GP |
| 4437 | MANDAL FM |
| 4439 | FARSUND FM |
| 4469 | VESTLAND GP |
| 4469 | ULA FM |
| 4634 | BRYNE FM |
| 4668 | ZECHSTEIN GP |
| 4750 | ROTLIEGEND GP |
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Composite log (Format:PDF. Size: 0.784 Mb) |
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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.
