Generated 11.02.2012
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Generated 11.02.2012 |
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| NPDID wellbore: | 3535 | |
| Well name: | 6305/7-1 | |
| Drilling operator name: | BP Norway Limited U.A. | |
| Geodetic datum: | ED50 | |
| Coordinates: | 63° 21` 47.60`` N | 5° 15` 43.73`` E |
| UTM coordinates: | 7028228.30 N | 613145.72 E |
| UTM zone: | 31 | |
| Drilled in production licence: | 208 | |
| Area: | NORWEGIAN SEA | |
| Discovery: | 6305/5-1 ORMEN LANGE | |
| Field: | ORMEN LANGE | |
| Drill permit: | 932-L | |
| Drilling facility: | OCEAN ALLIANCE | |
| Drilling days: | 54 | |
| Wellbore entry date: | 08.07.1998 | |
| Wellbore completion date: | 30.08.1998 | |
| Original wellbore purpose: | WILDCAT | |
| Wellbore purpose: | APPRAISAL | |
| Wellbore status: | P&A | |
| Wellbore contents: | GAS | |
| Discovery wellbore: | NO | |
| Formation/age with hydrocarbons 1: | EGGA (INFORMAL) / PALEOCENE | |
| Seismic location: | BPN 9603- INLINE 2008 & X-LINE 3170 | |
| Kelly bushing elevation (KB) [m]: | 26 | |
| Water depth [m]: | 857 | |
| Total Depth (MD) [m]: | 3377 | |
| Final vertical depth (TVD) [m]: | 3377 | |
| Max inclination [°]: | 2.60 | |
| Bottom hole temperature [°C]: | 100 | |
| Oldest penetrated age: | LATE CRETACEOUS | |
| Oldest penetrated formation: | SPRINGAR FM | |
| Note: All depths, except the water depth, are relative to kelly bushing (RKB) | ||
General
Well 6305/7-1 was the first well drilled in licence PL 208 and the second in the Møre Basin deep-water area. The well was targeted at the Barden prospect at Tertiary level. The main objectives of the well were to establish the presence, quality and fluid content of the Lower Tertiary Egga Member in the Tang Formation and to penetrate a seismic flat-spot within this unit.
Operations and results
Wildcat well 6305/7-1 was spudded in 857 m water depth with the semi-submersible installation "Ocean Alliance" on 6 July 1998 and drilled to TD at 3377 m in the Late Cretaceous Springar Formation. The well was drilled water based with seawater and hi-vis pills down to 1708 m and with KCl/NaCl/PAC mud from 1708 m to TD. Drilling went without major problems but was suspended from 20 July to 1 August (10 days) due to fishing regulations. Top Egga Member sandstone was penetrated at 2911 m. The reservoir was recognized by an abrupt increase in LWD resistivity and a decrease in LWD gamma. A total of 4 cores were cut from the Egga Member and top of the Springar Formation in the interval 2917 m to 3012.5 m with a total recovery of 94 m (98%). MDT samples were taken at 2921 and 2937 m in the Egga Member sandstone. The samples contained dry gas (93.5 % methane). Wire line coring and sampling proved a gas column from 2915 m to 2939.5 m. Both the reservoir thickness of the Egga formation and the net to gross were better than expected. The well was plugged and abandoned on 30 August 1998 and was classified as a gas appraisal well for the Ormen Lange 6305/5-1 gas discovery.
Testing
A drill stem test was performed in the interval 2915 m to 2931 m. The test flowed dry gas (93.3 % methane) with a GOR of 11000 Sm3/Sm3
Interval [m]: 1710.00 - 3377.00
Core length [m]: 94.10
| Core number | Interval |
|---|---|
| 1 | 2917.00-2943.80 |
| 2 | 2944.00-2971.15 |
| 3 | 2971.00-2984.85 |
| 4 | 2985.50-3011.78 |
 2917-2922m |
 2922-2927m |
 2927-2932m |
 2932-2937m |
 2937-2942m |
 2942-2944m |
 2944-2949m |
 2949-2954m |
 2954-2959m |
 2959-2964m |
 2964-2969m |
 2969-2971m |
 2971-2976m |
 2976-2981m |
 2981-2985m |
 2985-2990m |
 2990-2995m |
 2995-3000m |
 3000-3005m |
 3005-3010m |
 3010-3012m |
No palynological slides in this wellbore.
| Test type: | Bottle test number: | Bottle interval [m]: | Fluid type: | Test date and time: |
|---|---|---|---|---|
| DST | DST 1 | 2915.000 - 2931.000 | CONDENSATE | 1998.08.23 00:00 |
| Type | Casing diam. [inch] | Depth below KB [m] | Hole diam. [inch] | Hole depth below KB [m] | Lot mud eqv. [g/cm3] |
|---|---|---|---|---|---|
| CONDUCTOR | 30 | 907.0 | 36 | 907.0 | |
| INTERM. | 13 3/8 | 1696.0 | 17 1/2 | 1696.0 | 1.40 |
| INTERM. | 9 5/8 | 2810.0 | 12 1/4 | 2819.0 | |
| LINER | 7 | 3377.0 | 8 1/2 | 3377.0 |
| Depth MD [m] | Mud weight [g/cm3] | Visc. [MPa.s] | Yield [pnt Pa.] | Mud type | Date measured |
|---|---|---|---|---|---|
| 961 | 1.03 | 20.0 | WATER BASED MUD | ||
| 1269 | 1.03 | 15.0 | WATER BASED MUD | ||
| 1708 | WATER BASED MUD | ||||
| 2071 | 1.28 | 40.0 | WATER BASED MUD | ||
| 2819 | 1.30 | 44.0 | WATER BASED MUD | ||
| 2852 | 1.30 | 27.0 | WATER BASED MUD | ||
| 2944 | 1.30 | 33.0 | WATER BASED MUD | ||
| 2968 | 1.30 | 29.0 | WATER BASED MUD | ||
| 2980 | 1.30 | 28.0 | WATER BASED MUD | ||
| 2993 | 1.30 | 28.0 | WATER BASED MUD | ||
| 3377 | 1.08 | 1.0 | WATER BASED MUD |
| 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 | 2915 - 2931 | 23.8 | 28.960 | 90 |
| Test no. | Oil [Sm3/day] | Gas [Sm3/day] | Oil grav. [g/cm3] | Gas grav. rel.air | GOR [m3/m3] |
|---|---|---|---|---|---|
| 1.0 | 58 | 638000 | .770 | .610 | 11000 |
| Log type | Intervals logged [m] |
|---|---|
| MWD - DIR | 904 - 925 |
| MWD - DIR PWD GR | 941 - 2819 |
| MWD - DIR FE | 2819 - 2917 |
| MWD - RLL GR | 2944 - 3012 |
| MWD - DIR FE | 2917 - 2919 |
| HALS DSI PEX EMS | 883 - 2819 |
| CSAT GR | 1920 - 2780 |
| PEX GPIT | 2761 - 3380 |
| MDT GR | 2914 - 3047 |
| FMI DSI | 2000 - 3373 |
| CSAT GR | 2720 - 3360 |
| CST GR | 2832 - 3360 |
| Top depth [m] | Litostratigraphic unit |
|---|---|
| 883 | NORDLAND GP |
| 883 | NAUST FM |
| 1529 | HORDALAND GP |
| 1529 | BRYGGE FM |
| 2562 | ROGALAND GP |
| 2562 | TARE FM |
| 2657 | TANG FM |
| 2911 | EGGA FM (INFORMAL) |
| 2992 | SHETLAND GP |
| 2992 | SPRINGAR FM |
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