16/7-3
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General information
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Wellbore history
GeneralExploration well 16/7-3 is located on the Utsira High, about ten km east of the Sleipner East field. The objective of the well was to test potential Jurassic sands on the large structure in the centre of the block.The well would also test the Zechstein carbonate and Rotliegendes sandstone plays in a small fault block structure.Operations and resultsThe well was spudded with the semi-submersible installation Glomar Biscay II and drilled without incident to TD at 3141 m in the Rotliegendes Group. The well was drilled with seawater gel, adding lignite from 2150 m.The Cretaceous sequence consisted of the Late Cretaceous Tor and Hod chalk formations resting unconformably on a very thin Late Jurassic Draupne shale. Thirty-seven net m of good quality sand was encountered in the Jurassic Hugin Formation. The Triassic consisted of red beds with no major sand development. The Zechstein contained tight anhydritic dolomite, some vuggy dolomite, and shales, while the Rotliegendes Group had poor reservoir quality dolomite cemented sandstones, siltstones and shales. A shows on a core was recorded in the interval 2345 m to 2350.7 m in the upper part of the Jurassic Hugin Formation. Otherwise no hydrocarbons were encountered in the well. Two cores were taken in the 8 1/2" section, in the interval 2342 m to 2365.5 m in the Jurassic Hugin Formation. Forty sidewall cores were taken in the interval 2296 m to 3130 m. No fluid samples were taken. The well was permanently abandoned as dry on 28 August 1982.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]180.003140.00 -
Cores at the Norwegian Offshore Directorate
Cores at the Norwegian Offshore Directorate Core sample numberCore sample - top depthCore sample - bottom depthCore sample depth - uom12342.02350.7[m ]22351.02365.6[m ]Cores at the Norwegian Offshore Directorate Total core sample length [m]23.2Cores 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 typeCONDUCTOR30171.336173.00.00LOTSURF.COND.20449.526469.01.78LOTINTERM.13 3/81212.017 1/21228.01.74LOTINTERM.9 5/82287.012 1/42303.01.80LOTOPEN HOLE3141.08 1/23141.00.00LOT -
Logs
Logs Log typeLog top depth [m]Log bottom depth [m]4ARM-CAL1104604ARM-CAL4401223CBL GR171255CDL CNL GR SP CAL22872851CDL CNL GR SP CAL25003134DIPLOG22823133IEL AC GR SP CAL105463IEL AC GR SP CAL4401223IEL AC GR SP CAL18822297IEL AC GR SP CAL22742848IEL AC GR SP CAL25003134MFT23462841SWC22963130TEMP101183TEMP CCL12001775VSP1753128 -
Lithostratigraphy
Lithostratigraphy Top depth [mMD RKB]Lithostrat. unit110835995119420002000204821072244225822582265231123322332233323442344238523852795279528572859 -
Composite logs
Composite logs Document nameDocument formatDocument size [MB]pdf0.39 -
Geochemical information
Geochemical information Document nameDocument formatDocument size [MB]pdf2.31 -
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]pdf2.31 -
Drilling mud
Drilling mud Depth MD [m]Mud weight [g/cm3]Visc. [mPa.s]Yield point [Pa]Mud typeDate measured3401.0755.0water4601.1040.0water6401.1450.0water9801.1940.0water16201.2047.0water19901.1943.0water21401.1746.0water22301.2760.0water28801.2154.0water29401.2056.0water -
Palynological slides at the Norwegian Offshore Directorate
Palynological slides at the Norwegian Offshore Directorate Sample depthDepth unitSample typeLaboratory520.0[m]DC550.0[m]DC580.0[m]DC610.0[m]DC640.0[m]DC670.0[m]DC700.0[m]DC730.0[m]DC760.0[m]DC790.0[m]DC820.0[m]DC850.0[m]DC880.0[m]DC910.0[m]DC940.0[m]DC970.0[m]DC1000.0[m]DC1030.0[m]DC1060.0[m]DC1090.0[m]DC1120.0[m]DC1150.0[m]DC1180.0[m]DC1210.0[m]DC1240.0[m]DC1270.0[m]DC1300.0[m]DC1330.0[m]DC1360.0[m]DC1390.0[m]DC1420.0[m]DC1450.0[m]DC1480.0[m]DC1510.0[m]DC1540.0[m]DC1570.0[m]DC1600.0[m]DC1630.0[m]DC1660.0[m]DC1690.0[m]DC1720.0[m]DC1750.0[m]DC1780.0[m]DC1810.0[m]DC1840.0[m]DC1870.0[m]DC1900.0[m]DC1930.0[m]DC1960.0[m]DC1990.0[m]DC2021.0[m]DC2039.0[m]DC2051.0[m]DC2060.0[m]DC2069.0[m]DC2081.0[m]DC2090.0[m]DC2099.0[m]DC2111.0[m]DC2120.0[m]DC2129.0[m]DC2141.0[m]DC2171.0[m]DC2180.0[m]DC2189.0[m]DC2201.0[m]DC2210.0[m]DC2219.0[m]DC2231.0[m]DC2240.0[m]DC2249.0[m]DC2252.0[m]DC2261.0[m]DC2273.0[m]DC2282.0[m]DC2312.0[m]DC2334.5[m]SWC2335.0[m]SWC2336.5[m]SWC2337.5[m]SWC2337.5[m]SWC2340.0[m]SWC2341.0[m]SWC2342.0[m]C2342.0[m]DC2342.1[m]C2342.5[m]C2342.8[m]C2343.0[m]C2343.3[m]C2343.8[m]C2344.0[m]C2345.5[m]C2346.3[m]C2347.0[m]C2351.0[m]C2351.2[m]C2354.1[m]C2355.0[m]C2356.8[m]C2359.0[m]C2361.3[m]C2363.0[m]C2364.0[m]C2365.0[m]C2365.5[m]C2372.0[m]DC2372.0[m]SWC2376.0[m]SWC2386.0[m]SWC2391.0[m]SWC2402.0[m]DC2432.0[m]DC2462.0[m]DC2492.0[m]DC2522.0[m]DC2543.0[m]DC2573.0[m]DC2581.0[m]SWC2603.0[m]DC2635.0[m]DC2666.0[m]DC2696.0[m]DC2726.0[m]DC2756.0[m]DC2786.0[m]DC2816.0[m]DC2840.2[m]SWC2846.0[m]DC2876.0[m]DC2906.0[m]DC2936.0[m]DC2966.0[m]DC2996.0[m]DC3026.0[m]DC3056.0[m]DC3086.0[m]DC3116.0[m]DC3140.0[m]DC