7019/1-1
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General information
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Wellbore history
GeneralWell 7019/1-1 was drilled in the central-western part of block 7019/1. The primary target of the well was to test the hydrocarbon potential of the Middle Jurassic through Upper Triassic Stø Formation sandstone of the Kapp Toscana Group. Lower Basal clastics of the Early Cretaceous Knurr Formation were a secondary target.Operations and resultsExploration well 7019/1-1 was spudded with the semi-submersible installation "Transocean Arctic" on 6 October 2000. The seabed soil/formation was found to be very hard with embedded boulders and drilling progress was slow. The rig was thus moved 10 m and the well was re-spudded and drilled to TD at 3003 m, 141 m into the Early Jurassic Tubåen Formation. The well was drilled with Seawater and High Viscous sweeps with pre-hydrated bentonite mud down to 665 m, and with Formate brine / XC Polymer / PAC from 665 m to TD. The reservoir of the Stø Formation was encountered at 2447 m and was found to be gas bearing. The Gas/Water contact was encountered at 2597 m. Shows were observed down to 2610 m. Poor shows were also noted through the Nordmela Formation and into the top of the Tubåen Formation to 2865 m. The Basal Clastics of the Knurr Formation were also found HC bearing at 2211 m with poor shows down to 2220 m. No HC/water contact was seen in this reservoir. Three cores were cut, one in the Knurr Formation, and two in the Stø Formation. Gas from the Lower Cretaceous reservoir was sampled with MDT at 2246 m. Gas samples from the Jurassic Stø formation were taken during the DST. The well was permanently abandoned as a gas discovery on 3 December 2000.TestingA test was performed in the interval 2526 to 2563 m in the Stø Formation. The well flowed 606000 m3 gas per day (no liquid) from a 40/64 choke. Gas gravity was 1,133 (air = 1), CO2 content 60 - 70%, and H2S content 6 - 13 PPM. The test was stopped during the clean up phase due to the high CO2. -
Cuttings at the Norwegian Offshore Directorate
Cuttings at the Norwegian Offshore Directorate Cuttings available for sampling?YESCuttings at the Norwegian Offshore Directorate Cutting sample, top depth [m]Cutting samples, bottom depth [m]670.003001.00 -
Cores at the Norwegian Offshore Directorate
Cores at the Norwegian Offshore Directorate Core sample numberCore sample - top depthCore sample - bottom depthCore sample depth - uom12220.02234.3[m ]22457.02463.8[m ]32561.02568.0[m ]Cores at the Norwegian Offshore Directorate Total core sample length [m]28.1Cores at the Norwegian Offshore Directorate Cores available for sampling?YES -
Core photos
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Casing and leak–off tests
Casing and leak–off tests Casing typeCasing diam.
[inch]Casing depth
[m]Hole diam.
[inch]Hole depth
[m]LOT/FIT mud eqv.
[g/cm3]Formation test typeCONDUCTOR30336.036343.00.00LOTSURF.COND.20658.026665.01.65LOTINTERM.9 5/82004.012 1/42015.01.73LOTLINER73003.08 1/23003.00.00LOT -
Logs
Logs Log typeLog top depth [m]Log bottom depth [m]FMI DSI20043002HALS PEX20022523HRLA PEX20043002MDT22122544MDT GR22463984MDT GR22462951MDT GR26010MSCT24962548MSCT29520MWD MPR - GR DIR RES20152875MWD MPR - GR DIR RES SONIC348665MWD MPR - GR DIR RES SONIC6702015VSP20023001 -
Lithostratigraphy
Lithostratigraphy Top depth [mMD RKB]Lithostrat. unit214448448603603121512152127234523772447244726102862 -
Composite logs
Composite logs Document nameDocument formatDocument size [MB]pdf0.39 -
Geochemical information
Geochemical information Document nameDocument formatDocument size [MB]pdf1.55 -
Documents – reported by the production licence (period for duty of secrecy expired)
Documents – reported by the production licence (period for duty of secrecy expired) Document nameDocument formatDocument size [MB].pdf1.80.pdf2.24 -
Drilling mud
Drilling mud Depth MD [m]Mud weight [g/cm3]Visc. [mPa.s]Yield point [Pa]Mud typeDate measured2241.03SW/BENTONITE6001.03SW/BENTONITE6501.03SW/BENTONITE6501.03SW/BENTONITE7201.3010.0FORMATE/POLYMER18071.3011.0FORMATE20151.3913.0FORMATE20951.3913.0FORMATE22211.3911.0FORMATE22371.3912.0FORMATE22951.3913.0FORMATE23351.3913.0FORMATE23811.3913.0FORMATE24101.3913.0FORMATE24341.3911.0FORMATE24591.3914.0FORMATE24651.3913.0FORMATE25121.3913.0FORMATE25301.3512.0FORMATE25501.3513.0FORMATE25571.259.0FORMATE25691.2510.0FORMATE26331.25FORMATE-POLYMER26331.25FORMATE-POLYMER26571.2510.0FORMATE27271.259.0FORMATE27941.2511.0FORMATE28471.2510.0FORMATE29881.2510.0FORMATE30031.25FORMATE POLYMER -
Thin sections at the Norwegian Offshore Directorate
Thin sections at the Norwegian Offshore Directorate DepthUnit2221.25[m ]2227.55[m ]2228.25[m ]