6507/8-3
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General information
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Wellbore history
GeneralWell 6507/8-3 was the third in the block, located on the Sør High northeast of the Heidrun Field. The hole was drilled on the alpha-structure, a rotated fault block dipping towards south and west. Jurassic and parts of Triassic is probably eroded. The primary objective of the well was to test the hydrocarbon bearing potential of the previously undrilled alpha structure. The secondary objective was to verify geological model and structural interpretation, to drill the third commitment well in the block, to improve the paleontological, geological and geochemical understanding of the area. Planned TD was in Triassic sediments.Operations and resultsWildcat well 6507/8-3 was spudded with Smedvig Drilling semi-submersible installation West Delta on 3 September 1988 and drilled to TD at 2075 m in Triassic rocks of the Åre Formation. The well was drilled with spud mud down to 558 m, with CMC from 558 m to 1101 m, and with gel/CMC/Ligno from 1101 m to TD. There was no shallow gas. The whole operation went very fast and without problems of any kind and TD was reached in 11 days.Both the Eocene to Miocene and the Cretaceous are missing in the well. Top reservoir (Garn Formation) was encountered at 1358 m. It contained a small amount of gas with a gas/water contact at 1362 m. FMT testing at 1361 m showed dry gas consisting of 99% methane, interpreted to be of biogenic origin. Apart from this methane the well was found to be dry based on cuttings, cores, and logs. Two cores were cut in the well. Core 1 was cut between 1367 ? 1380 m (only the lower 1.5 m from the Not Formation recovered) and core 2 in the interval 1396 -1408 m in the Ile/Ror Formations.The well was plugged and abandoned completed 20 September 1988 at as dry.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]560.002075.00 -
Cores at the Norwegian Offshore Directorate
Cores at the Norwegian Offshore Directorate Core sample numberCore sample - top depthCore sample - bottom depthCore sample depth - uom11378.91380.0[m ]21395.01406.8[m ]Cores at the Norwegian Offshore Directorate Total core sample length [m]12.9Cores 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 typeCONDUCTOR30399.036567.00.00LOTSURF.COND.20552.026722.01.25LOTINTERM.13 3/81086.017 1/21100.01.83LOTOPEN HOLE2075.012 1/42075.00.00LOT -
Logs
Logs Log typeLog top depth [m]Log bottom depth [m]CBL VDL GR3381085CDL CN GR10852071DIFL ACL GR CDL325945DIFL BHC GR10852074DIPLOG10852073FMT13611361FMT13681395MWD - GR RES DIR3972072RSCT11632026SWC12352026VSP4802070 -
Lithostratigraphy
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Composite logs
Composite logs Document nameDocument formatDocument size [MB]pdf0.30 -
Geochemical information
Geochemical information Document nameDocument formatDocument size [MB]pdf0.48 -
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]pdf12.28 -
Drilling mud
Drilling mud Depth MD [m]Mud weight [g/cm3]Visc. [mPa.s]Yield point [Pa]Mud typeDate measured5571.1511.03.0WATER BASED07.09.19885571.157.04.0WATER BASED08.09.198811001.169.03.0WATER BASED09.09.198811001.159.03.0WATER BASED12.09.198813001.2010.07.0WATER BASED12.09.198813001.2114.05.0WATER BASED12.09.198813001.2015.03.0WATER BASED13.09.198813001.2120.06.0WATER BASED14.09.198813001.2117.07.0WATER BASED16.09.198820751.2017.07.0WATER BASED16.09.1988 -
Palynological slides at the Norwegian Offshore Directorate
Palynological slides at the Norwegian Offshore Directorate Sample depthDepth unitSample typeLaboratory1250.0[m]DCSTRAT1260.0[m]DCSTRAT1275.0[m]SWCSTRAT1288.0[m]SWCSTRAT1299.0[m]DCSTRAT1308.0[m]DCSTRAT1326.0[m]DCSTRAT1332.0[m]DCSTRAT1350.0[m]DCSTRAT1355.0[m]SWCSTRAT1362.0[m]DCSTRAT1363.0[m]SWCSTRAT1371.0[m]DCSTRAT1380.0[m]DCSTRAT1396.0[m]CSTRAT1398.8[m]CSTRAT1402.5[m]CSTRAT1405.9[m]CSTRAT1406.8[m]CSTRAT1419.0[m]DCSTRAT1431.0[m]DCSTRAT1437.0[m]DCSTRAT1443.0[m]DCSTRAT1445.0[m]SWCSTRAT1449.0[m]DCSTRAT1455.0[m]DCSTRAT1461.0[m]DCSTRAT1467.0[m]DCSTRAT1473.0[m]DCSTRAT1479.0[m]DCSTRAT1485.0[m]DCSTRAT1491.0[m]DCSTRAT1512.0[m]DCSTRAT1530.0[m]DCSTRAT1545.0[m]SWCSTRAT1566.0[m]DCSTRAT1584.0[m]DCSTRAT1620.0[m]SWCSTRAT1632.0[m]DCSTRAT1644.0[m]DCSTRAT1656.0[m]DCSTRAT1668.0[m]DCSTRAT1677.0[m]SWCSTRAT1680.0[m]DCSTRAT1716.0[m]DCSTRAT1728.0[m]DCSTRAT1740.0[m]DCSTRAT1750.0[m]SWCSTRAT1764.0[m]DCSTRAT1776.0[m]DCSTRAT1788.0[m]DCSTRAT1808.0[m]SWCSTRAT1824.0[m]DCSTRAT1836.0[m]DCSTRAT1848.0[m]DCSTRAT1860.0[m]DCSTRAT1872.0[m]DCSTRAT1875.0[m]SWCSTRAT1884.0[m]DCSTRAT1896.0[m]DCSTRAT1908.0[m]DCSTRAT1915.0[m]SWCSTRAT1932.0[m]DCSTRAT1944.0[m]DCSTRAT1956.0[m]DCSTRAT1968.0[m]DCSTRAT1975.0[m]SWCSTRAT1992.0[m]DCSTRAT2006.0[m]DCSTRAT2016.0[m]DCSTRAT2026.0[m]SWCSTRAT2040.0[m]DCSTRAT2052.0[m]DCSTRAT2064.0[m]DCSTRAT2075.0[m]DCSTRAT