7125/4-2
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General information
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Wellbore history
GeneralThe 7125/4-2 Nucula Appraisal well was drilled in the Måsøy Fault Complex in the Barents Sea. The objective was to prove oil or gas in the Nucula B segment, with the Kapp Toscana Group sands as primary target and the lower Kobbe Formation as secondary target.Operations and resultsAppraisal well 7125/4-2 was spudded with the semi-submersible installation Polar Pioneer on 7 November 2008 and drilled to TD at 1750 m in the Early Triassic Klappmyss Formation. No shallow gas was observed. No significant problem was encountered in the operations. The well was drilled with seawater and hi-vis pills down to 503 m and with Glydril mud from 503 m to TD.The Kapp Toscana Group was encountered at 930 m, under 40 m of Late Jurassic Hekkingen Formation shale. Hydrocarbons were observed in the Kapp Toscana Group down to an OWC at 946 m. MDT pressure points indicated a pressure drop of up to 0.4 bar in the oil zone across the delineating fault between segments C and B. The top reservoir exhibited a similar low net to gross as seen in the first well. Deeper in the Kapp Toscana Group and top Snadd Fm, however, thicker water bearing channel sandstones were observed. Weak oil shows were recorded from 1281 to 1290 m in the base of the Snadd Formation, and from 1536 to 1560 m in the Kobbe Formation.No cores were cut in the well. The MDT toll was run for pressure measurements, water and oil samples. Oil samples, both 2 3/4 gallon and 18 Gallon samples, was recovered from 940 m, while water samples were recovered from 946.5, 976.4, and 1027.9 m. Due to the good reservoir properties the fluid samples were collected with low drawdown. The oil samples were collected below the bubble point and the water samples had very low contamination of mud filtrate.The well was permanently abandoned on 1 December 2008 as an oil appraisal well.TestingNo drill stem test was performed. -
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]507.001750.00 -
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 typeCONDUCTOR30365.036365.00.00LOTSURF.COND.13 3/8503.017 1/2503.01.60LOTINTERM.9 5/8810.012 1/4810.02.18LOTOPEN HOLE1750.08 1/21750.00.00LOT -
Logs
Logs Log typeLog top depth [m]Log bottom depth [m]FMI HNGS HRLA8101110MDT810976MDT8101110MDT8101050MDT810810MDT10271699MSCT8261700MWD - ARCVRES6 TELE GVR68111750MWD - ARCVRES8 PP ISONIC8506811MWD - ARCVRES9 TELE VSONIC9365506MWD - POWEROULSE317365PEX ECS MSIP CMR8101110PEX ECS MSIP CMR10001750PEX MSIP HNGS503811VSP3641750 -
Lithostratigraphy
Lithostratigraphy Top depth [mMD RKB]Lithostrat. unit3175205235235535538128448919309301026129912991683 -
Composite logs
Composite logs Document nameDocument formatDocument size [MB]pdf0.29 -
Drilling mud
Drilling mud Depth MD [m]Mud weight [g/cm3]Visc. [mPa.s]Yield point [Pa]Mud typeDate measured5341.2917.0Glydril7581.3017.0Glydril8111.3117.0Glydril10811.2918.0Glydril11101.3018.0Glydril11371.3119.0Glydril17501.3016.0Glydril -
Palynological slides at the Norwegian Offshore Directorate
Palynological slides at the Norwegian Offshore Directorate Sample depthDepth unitSample typeLaboratory555.0[m]DCSTATHYD579.0[m]DCSTATHYD591.0[m]DCSTATHY603.0[m]DCSTATHY615.0[m]DCSTATHY630.0[m]DCSTATHY642.0[m]DCSTATHY657.0[m]DCSTATHY669.0[m]DCSTATHY687.0[m]DCSTATHY693.0[m]DCSTATHY705.0[m]DCSTATHY717.0[m]DCSTATHY729.0[m]DCSTATHY741.0[m]DCSTATHY753.0[m]DCSTATHY765.0[m]DCSTATHY777.0[m]DCSTATHY810.0[m]DCSTATHY828.0[m]DCSTATHY837.0[m]DCSTATHY843.0[m]DCSTATHY891.0[m]DCSTATHY899.9[m]SWCSTATHY909.0[m]DCSTATHY918.0[m]DCSTATHY926.0[m]SWCSTATHY930.0[m]SWCSTATHY939.0[m]DCSTATHY948.0[m]DCSTATHY957.0[m]DCSTATHY981.0[m]DCSTATHY1062.0[m]DCSTATHY1071.0[m]DCSTATHY1098.0[m]DCSTATHY1107.0[m]DCSTATHY1113.0[m]DCSTATHY1120.0[m]SWCSTATHY1128.0[m]DCSTATHY1137.0[m]DCSTATHY1146.0[m]DCSTATHY1155.0[m]DCSTATHY1164.0[m]DCSTATHY1173.0[m]DCSTATHY1182.0[m]DCSTATHY1191.0[m]DCSTATHY1200.0[m]DCSTATHY1209.0[m]DCSTATHY1218.0[m]DCSTATHY1227.0[m]DCSTATHY1236.0[m]DCSTATHY1245.0[m]DCSTATHY1254.0[m]DCSTATHY1263.0[m]DCSTATHY1272.0[m]DCSTATHY1281.0[m]DCSTATHY1290.0[m]DCSTATHY1299.0[m]DCSTATHY1308.0[m]DCSTATHY1317.0[m]DCSTATHY1326.0[m]DCSTATHY1335.0[m]DCSTATHY1344.0[m]DCSTATHY1353.0[m]DCSTATHY1362.0[m]DCSTATHY1371.0[m]DCSTATHY1380.0[m]DCSTATHY1389.0[m]DCSTATHY1398.0[m]DCSTATHY1406.0[m]DCSTATHY1407.0[m]DCSTATHY1425.0[m]DCSTATHY1434.0[m]DCSTATHY1443.0[m]DCSTATHY1452.0[m]DCSTATHY1461.0[m]DCSTATHY1470.0[m]DCSTATHY1479.0[m]DCSTATHY1497.0[m]DCSTATHY1506.0[m]DCSTATHY1515.0[m]DCSTATHY1524.0[m]DCSTATHY1533.0[m]DCSTATHY1542.0[m]DCSTATHY1551.0[m]DCSTATHY1560.0[m]DCSTATHY1569.0[m]DCSTATHY1578.0[m]DCSTATHY1587.0[m]DCSTATHY1596.0[m]DCSTATHY1605.0[m]DCSTATHY1614.0[m]DCSTATHY1623.0[m]DCSTATHY1632.0[m]DCSTATHY1641.0[m]DCSTATHY1650.0[m]DCSTATHY1659.0[m]DCSTATHY1668.0[m]DCSTATHY1680.0[m]SWCSTATHY1686.0[m]DCSTATHY1698.0[m]DCSTATHY1707.0[m]DCSTATHY1716.0[m]DCSTATHY1728.0[m]DCSTATHY1734.0[m]DCSTATHY1740.0[m]DCSTATHY1750.0[m]DCSTATHY