7128/6-1
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General information
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Wellbore history
GeneralWell 7128/6-1 is located in the Finmark East area on the Finmark Platform approximately 226 km east north east of Hammerfest. The main objective of the well was to explore a bryozoan carbonate bioherm of the Røye Formation (Kungurian- Kazanian in age). Prognosed thickness of the carbonate was in excess of 180 m. The underlying Gzelian through Artinskian carbonate succession was seen as secondary objective. A third objective was sandstones of the Billefjorden Group (Visean), but no closure had been mapped at this horizon in the prospect area. Shallow gas warning was given for one interval at 369 m.The well is Type Well for the Tettegras, Ørn, Isbjørn, and Røye Formations and Reference Well for the Soldogg and Falk Formations.Operations and resultsWildcat well 7128/6-1 was spudded with the semi-submersible installation Arcade Frontier on 11 August 1991 and drilled to TD at 2543 m in pre-Carboniferous Basement rocks. No shallow gas was encountered. No significant problems occurred during the drilling operation. The well was drilled with seawater and hi-vis pills down to 833 m and with KCl polymer WBS/200 mud from 833 m to TD.Top Røye Formation came in at 1623 m. The secondary target, the Artinskian to Gzhelian limestone succession was penetrated from 1745.4 m to 2102 m. Basement was encountered at 2533.5 m. Overlying the basement is a thick sandstone sequence of Early Carboniferous age, the Soldogg Formation. Shows were recorded in limestone in the interval from 1630 m down to 2076 and in a sandstone stringer at 2176. No shows in the Soldogg Formation. A total of 24 conventional cores were cut in the carbonate sequence yielding a total of 472.4 m core. A total of 139 sidewall cores were attempted and 137 were recovered. A total of 39 formation pressure tests were attempted and three fluid samples were collected. The fluid samples were all mud filtrate. Analysis indicated normal hydrostatic formation pressure. The well was permanently abandoned with oil shows on 8 November 1991.TestingOne DST tests were performed in the interval 1623.5 m to 1664 m in the Røye Formation. Three attempts to make the well flow by means of lifting with N2-cushions gave no flow to the surface. Seventeen m3 of water was produced during initial and three reverse flow periods, but no hydrocarbons were observed. -
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]834.002542.00 -
Cores at the Norwegian Offshore Directorate
Cores at the Norwegian Offshore Directorate Core sample numberCore sample - top depthCore sample - bottom depthCore sample depth - uom11629.01641.0[m ]21643.01644.8[m ]31645.01646.6[m ]61701.31710.0[m ]71710.31728.0[m ]81728.01745.0[m ]91745.01755.0[m ]101755.01781.1[m ]111783.21810.0[m ]121810.11838.0[m ]131838.11873.0[m ]141874.81892.0[m ]151892.51928.0[m ]161928.61965.0[m ]171968.02005.3[m ]182005.32030.0[m ]192030.92043.0[m ]202043.32066.0[m ]212066.92094.0[m ]222094.62131.0[m ]232222.02249.4[m ]242540.02541.7[m ]Cores at the Norwegian Offshore Directorate Total core sample length [m]463.0Cores 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 typeCONDUCTOR30453.036455.00.00LOTINTERM.20823.826825.00.00LOTINTERM.13 3/81569.417 1/21570.00.00LOTINTERM.9 5/81800.012 1/41802.00.00LOTOPEN HOLE2543.08 1/22543.00.00LOT -
Drill stem tests (DST)
Drill stem tests (DST) Test numberFrom depth MD
[m]To depth MD
[m]Choke size
[mm]1.0162316640.0Drill stem tests (DST) Test numberFinal shut-in pressure
[MPa]Final flow pressure
[MPa]Bottom hole pressure
[MPa]Downhole temperature
[°C]1.016.000Drill stem tests (DST) Test numberOil
[Sm3/day]Gas
[Sm3/day]Oil density
[g/cm3]Gas grav. rel.airGOR
[m3/m3]1.0 -
Logs
Logs Log typeLog top depth [m]Log bottom depth [m]CBIL GR15692124DAC GR00DAC GR15692540DEL2 GR16002150DIFL ACL GR20602540DIFL ACL ZDL CN GR00DIFL ACL ZDL CN GR15252130DIFL MLL ACL GR SP7471577DIP GR15692540DLL MLL GR20602539DLL MLL SL15652128FMT16302525FMT16450FMT19050FMT R16450GR ACL DIFL00GR ACL DIFL358825MWD - DIR GR RES3602540SWC459816SWC8431575SWC15852523VSP4702541ZDL CN SL8231477ZDL CN SL20602540 -
Lithostratigraphy
Lithostratigraphy Top depth [mMD RKB]Lithostrat. unit3594884887341002162316231745174518341834205021502150220223582534 -
Composite logs
Composite logs Document nameDocument formatDocument size [MB]pdf0.42 -
Geochemical information
Geochemical information Document nameDocument formatDocument size [MB]pdf2.30 -
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]pdf1.80pdf28.92 -
Drilling mud
Drilling mud Depth MD [m]Mud weight [g/cm3]Visc. [mPa.s]Yield point [Pa]Mud typeDate measured3971.03WATER BASED16.08.19914031.1457.08.0WATER BASED06.11.19914031.01WATER BASED07.11.19914541.10WATER BASED16.08.19914541.10WATER BASED16.08.19915841.10WATER BASED16.08.19918301.20WATER BASED16.08.19918301.4414.027.0WATER BASED20.08.19918301.00WATER BASED26.08.19918301.1046.014.0WATER BASED26.08.19918301.2044.013.0WATER BASED28.08.19918301.1741.012.0WATER BASED28.08.19918371.2042.018.0WATER BASED29.08.19919361.2040.014.0WATER BASED30.08.199110691.1841.012.0WATER BASED02.09.199110691.1952.027.0WATER BASED02.09.199113331.1943.013.0WATER BASED02.09.199113671.1942.011.0WATER BASED03.09.199115501.1943.011.0WATER BASED04.09.199115521.1456.08.0WATER BASED05.11.199115691.1947.011.0WATER BASED09.09.199115781.1943.013.0WATER BASED05.09.199115781.1945.014.0WATER BASED09.09.199115781.1948.014.0WATER BASED09.09.199116301.1945.010.0WATER BASED10.09.199116441.1746.010.0WATER BASED11.09.199116471.1646.010.0WATER BASED12.09.199116481.1649.010.0WATER BASED16.09.199116561.1648.012.0WATER BASED16.09.199116961.1550.017.0WATER BASED16.09.199116981.1554.016.0WATER BASED16.09.199117021.1553.015.0WATER BASED17.09.199117091.1653.015.0WATER BASED18.09.199117121.1610.012.0WATER BASED20.09.199117281.1610.014.0WATER BASED20.09.199117391.1610.06.5WATER BASED24.09.199117471.1710.07.5WATER BASED24.09.199117601.1749.015.0WATER BASED23.10.199117681.1610.07.5WATER BASED24.09.199117751.1756.017.0WATER BASED25.10.199117751.1644.015.0WATER BASED28.10.199117751.1356.04.0WATER BASED01.11.199117751.1642.013.0WATER BASED28.10.199117751.1544.015.0WATER BASED29.10.199117751.1340.04.0WATER BASED29.10.199117751.1341.04.0WATER BASED31.10.199117751.1456.06.0WATER BASED05.11.199117751.1558.08.0WATER BASED05.11.199117751.1456.08.0WATER BASED05.11.199117831.1652.015.0WATER BASED24.09.199117951.1652.013.0WATER BASED25.09.199118101.1756.015.0WATER BASED24.10.199118161.1658.016.0WATER BASED26.09.199118381.1652.014.0WATER BASED27.09.199118741.1649.013.0WATER BASED30.09.199118921.1643.014.0WATER BASED30.09.199119331.1749.010.0WATER BASED30.09.199119681.1649.013.0WATER BASED02.10.199120051.1648.016.0WATER BASED02.10.199120301.1652.014.0WATER BASED03.10.199120431.1755.016.0WATER BASED04.10.199120631.1754.018.0WATER BASED07.10.199120661.1751.015.0WATER BASED08.10.199120941.1748.014.0WATER BASED08.10.199121201.1747.014.0WATER BASED08.10.199121311.1744.014.0WATER BASED09.10.199121321.1644.013.0WATER BASED10.10.199121621.1647.015.0WATER BASED11.10.199121831.1647.015.0WATER BASED14.10.199122221.1645.015.0WATER BASED14.10.199122501.1747.014.0WATER BASED14.10.199123261.1647.015.0WATER BASED15.10.199124721.1645.014.0WATER BASED16.10.199125401.1743.014.0WATER BASED17.10.199125401.1747.015.0WATER BASED22.10.199125401.1747.015.0WATER BASED22.10.199125401.1747.015.0WATER BASED18.10.199125431.1745.014.0WATER BASED22.10.199125431.1745.015.0WATER BASED22.10.1991 -
Palynological slides at the Norwegian Offshore Directorate
Palynological slides at the Norwegian Offshore Directorate Sample depthDepth unitSample typeLaboratory2121.2[m]COD2160.0[m]DCUIB2163.0[m]DCUIB2175.0[m]DCUIB2187.0[m]DCUIB2193.0[m]DCUIB2196.0[m]DCUIB2208.0[m]DCUIB2220.0[m]DCUIB2222.2[m]CUIB2222.4[m]CUIB2222.4[m]CUIB2222.6[m]CUIB2222.7[m]CUIB2222.7[m]CUIB2222.8[m]CUIB2223.0[m]CUIB2223.1[m]CUIB2223.3[m]CUIB2223.5[m]CUIB2223.8[m]CUIB2224.4[m]CUIB2224.6[m]CUIB2224.8[m]CUIB2225.8[m]CUIB2225.8[m]CUIB2225.9[m]CUIB2226.4[m]CUIB2226.4[m]CUIB2227.6[m]CUIB2227.7[m]CUIB2227.8[m]CUIB2229.1[m]CUIB2232.0[m]CUIB2232.5[m]CUIB2232.7[m]CUIB2233.0[m]CUIB2233.1[m]CUIB2233.3[m]CUIB2233.4[m]CUIB2234.2[m]CUIB2234.7[m]CUIB2234.8[m]CUIB2235.1[m]CUIB2235.2[m]CUIB2235.5[m]CUIB2236.7[m]CUIB2237.1[m]CUIB2238.3[m]CUIB2238.4[m]CUIB2239.4[m]CUIB2239.6[m]CUIB2239.7[m]CUIB2240.3[m]CUIB2241.8[m]CUIB2242.0[m]CUIB2244.4[m]CUIB2244.6[m]CUIB2245.2[m]COD2245.3[m]CUIB2245.5[m]CUIB2246.8[m]CUIB2247.0[m]DCUIB2247.3[m]CUIB2247.4[m]CUIB2268.0[m]DCUIB2277.0[m]DCUIB2286.0[m]DCUIB2289.0[m]DCUIB2307.0[m]DCUIB2316.0[m]DCUIB2322.0[m]DCUIB2331.0[m]DCUIB2340.0[m]DCUIB2349.0[m]DCUIB2358.0[m]DCUIB2421.0[m]DCUIB -
Thin sections at the Norwegian Offshore Directorate
Thin sections at the Norwegian Offshore Directorate DepthUnit1630.10[m ]1637.81[m ]1643.88[m ]1744.58[m ]1751.69[m ]1757.53[m ]1812.74[m ]1812.86[m ]1836.03[m ]1845.75[m ]1866.52[m ]1868.51[m ]1877.48[m ]1891.90[m ]1896.70[m ]1902.72[m ]1904.75[m ]1883.41[m ]1913.49[m ]1916.15[m ]1930.44[m ]1945.28[m ]1947.94[m ]1952.04[m ]1957.66[m ]1975.63[m ]1964.40[m ]1973.66[m ]1971.63[m ]1985.63[m ]1993.63[m ]1997.43[m ]2000.70[m ]2006.47[m ]2015.03[m ]2025.12[m ]2044.52[m ]2046.03[m ]2049.78[m ]2073.92[m ]