6507/8-2
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General information
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Wellbore history
GeneralWell 6507/8-2 was the second well to be drilled in the block and is located in the Grinda Graben East of the Heidrun Field. The well was designed to drill and test the hydrocarbon potential of a clearly defined structure called the Theta structure. Secondary objectives were to verify the geological model and structural interpretation of the area, and to improve the paleontological, geological and geochemical understanding of the area. TD was planned 50 m into Triassic rocks.Operations and resultsWildcat well 6507/8-2 was spudded with Dyvi offshore semi-submersible rig Dyvi Delta on 15 August 1987 and drilled to TD at 2690 m in Late Triassic rocks of the ÅÅre Formation. The well was drilled with seawater and viscous pills down to 521 m, with KCl/Polymer mud from 521 m to TD.The whole of Cretaceous as well as the Late and Middle Jurassic were missing in the well. Early Jurassic shale/siltstone (Ror Formation) was encountered at 1890 m and the Early Jurassic Tilje Formation sandstones was encountered at 1945 m. Three cores were cut. The first was cut in the interval 1894 m to 1915 m in the Ror Formation while the next two recovered 9.5 m from the Tilje Formation. From cores, cuttings and logs the well was found to be dry all through. The well was plugged and abandoned on 9 September 1987 as a dry 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]530.002690.00 -
Cores at the Norwegian Offshore Directorate
Cores at the Norwegian Offshore Directorate Core sample numberCore sample - top depthCore sample - bottom depthCore sample depth - uom11894.01913.9[m ]31990.51996.0[m ]Cores at the Norwegian Offshore Directorate Total core sample length [m]25.4Cores 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 typeCONDUCTOR30448.036455.00.00LOTSURF.COND.20507.026964.01.26LOTINTERM.13 3/81055.017 1/21070.01.55LOTINTERM.9 5/81866.012 1/41881.01.72LOTOPEN HOLE2690.08 1/22690.00.00LOT -
Logs
Logs Log typeLog top depth [m]Log bottom depth [m]CBL VDL GR5701054CBL VDL GR7661865CDL CN GR18652635CDL GR5061060CDL GR10541880DIFL ACL GR5061060DIFL ACL GR10541880DIFL ACL GR18652666FMT18952096FMT18982414MWD - GR RES DIR3711881MWD - GR RES DIR23022690RLL18812302SWC18882616VSP5202660 -
Lithostratigraphy
Lithostratigraphy Top depth [mMD RKB]Lithostrat. unit3753751423171517151832183218651890189019452123 -
Composite logs
Composite logs Document nameDocument formatDocument size [MB]pdf0.42 -
Geochemical information
Geochemical information Document nameDocument formatDocument size [MB]pdf0.89 -
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]pdf14.01 -
Drilling mud
Drilling mud Depth MD [m]Mud weight [g/cm3]Visc. [mPa.s]Yield point [Pa]Mud typeDate measured4551.051200.0WATER BASED18.08.19874551.051200.0WATER BASED19.08.19875211.084800.03.0WATER BASED21.08.19879641.151500.04.2WATER BASED24.08.198710701.171300.03.8WATER BASED24.08.198710701.181200.03.4WATER BASED24.08.198714401.181300.04.2WATER BASED25.08.198717351.361700.05.0WATER BASED26.08.198717501.231300.03.4WATER BASED09.09.198718301.452500.04.0WATER BASED28.08.198718811.452000.03.4WATER BASED31.08.198718811.452800.05.0WATER BASED27.08.198719131.231200.03.4WATER BASED31.08.198719911.231600.03.8WATER BASED31.08.198723481.231600.04.2WATER BASED03.09.198726071.231500.03.4WATER BASED03.09.198726901.231700.03.4WATER BASED09.09.198726901.231700.03.4WATER BASED04.09.1987 -
Palynological slides at the Norwegian Offshore Directorate
Palynological slides at the Norwegian Offshore Directorate Sample depthDepth unitSample typeLaboratory1740.0[m]DCPALEO1750.0[m]DCPALEO1770.0[m]DCPALEO1780.0[m]DCPALEO1800.0[m]DCPALEO1818.0[m]DCPALEO1830.0[m]DCPALEO1836.0[m]DCPETROSTR1842.0[m]DCPETROS1842.0[m]DCPALEO1848.0[m]DCPETROS1854.0[m]DCPETROS1860.0[m]DCPALEO1866.0[m]DCPETROSTR1872.0[m]DCPETROS1875.0[m]DCPALEO1887.0[m]DCPALEO1887.0[m]DCPETROSTR1888.5[m]SWCPALEO1890.0[m]DCPALEO1890.0[m]DCPETROSTR1893.0[m]DCPALEO1894.7[m]CPALEO1895.2[m]CPALEO1896.0[m]SWCPALEO1905.0[m]DCPALEO1913.9[m]CPALEO1920.0[m]DCPALEO1935.0[m]DCPALEO1950.0[m]SWCPALEO1952.0[m]SWCPALEO1968.0[m]DCPALEO1983.0[m]DCPALEO1996.3[m]CPALEO1998.0[m]DCPALEO2015.0[m]SWCPALEO2018.0[m]SWCPALEO2028.0[m]DCPALEO2040.0[m]DCPALEO2058.0[m]DCPALEO2070.0[m]DCPALEO2088.0[m]DCPALEO2100.0[m]DCPALEO2123.0[m]DCPALEO2130.0[m]DCPALEO2148.0[m]DCPALEO2160.0[m]DCPALEO2178.0[m]DCPALEO2196.0[m]DCPALEO2211.0[m]DCPALEO2232.0[m]DCPALEO2247.0[m]DCPALEO2262.0[m]DCPALEO2277.0[m]DCPALEO2292.0[m]DCPALEO2307.0[m]DCPALEO2322.0[m]DCPALEO2337.0[m]DCPALEO2354.5[m]SWCPALEO2356.5[m]SWCPALEO2363.0[m]SWCPALEO2382.0[m]DCPALEO2397.0[m]DCPALEO2412.0[m]DCPALEO2427.0[m]DCPALEO2442.0[m]DCPALEO2457.0[m]DCPALEO2472.0[m]DCPALEO2487.0[m]DCPALEO2502.0[m]DCPALEO2517.0[m]DCPALEO2532.0[m]DCPALEO2547.0[m]DCPALEO2559.0[m]DCPALEO2577.0[m]DCPALEO2592.0[m]DCPALEO2607.0[m]DCPALEO2613.5[m]SWCPALEO2616.0[m]SWCPALEO2622.0[m]DCPALEO2637.0[m]DCPALEO2652.0[m]DCPALEO2667.0[m]DCPALEO2682.0[m]DCPALEO