15/9-16
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General information
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Wellbore history
GeneralWell 15/9-16 was drilled on the Sleipner Øst discovery in the southern Viking Graben of the North Sea. The primary objective was to delineate the hydrocarbon accumulations in the Heimdal Formation on the gamma structure. Sandstones of Jurassic/Triassic age were secondary objectives. It was the fourth well drilled on this structure.Operations and resultsAppraisal well 15/9-16 was spudded with the semi-submersible installation Deepsea Saga on 28 June 1982 and drilled to TD at 3120 m, 52 m into the Permian Rotliegendes Group. The 9 5/8" casing had a leak at 522 m. It was squeezed twice with cement before it held a reduced pressure. Otherwise, no significant problem was encountered in the operations. The well was drilled with gel/seawater spud mud down to 515 m, with gypsum/lignosulphonate mud from 515 m to 2652 m, and with a seawater/lignite/lignosulphonate mud from 2652 m to TD.Top Heimdal was encountered at 2378 m. It contained gas and condensate, but was thinner than expected. Pressure data indicated a gas/water contact at 2434 m. The logs showed a sharp increase in water saturation at 2428 m. Weak oil shows were recorded on cores between 2418 m and 2427.5 m. The prognosed sandstones of Jurassic/Triassic age were not present at this location. Fair shows were recorded on cuttings in evaporites at 3014 m, at top Zechstein Group level. No shows were recorded on sidewall cores from the same level.A total of 113.5 m of core (98% recovery) was cut in seven cores in the interval 2382 to 2498 m. cores were cut and no wire line logs were run in the well. An RFT fluid sample was taken at 2380 m (good recovery), while attempts to sample at 2411m, 2413 m, and 2426 m gave poor recovery.The well was permanently abandoned on 24 August 1982 on as a gas/condensate 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]180.003120.00 -
Cores at the Norwegian Offshore Directorate
Cores at the Norwegian Offshore Directorate Core sample numberCore sample - top depthCore sample - bottom depthCore sample depth - uom12382.02395.7[m ]22397.02414.2[m ]32414.52427.5[m ]42427.52440.2[m ]52441.02460.0[m ]62460.02479.5[m ]72479.52498.3[m ]Cores at the Norwegian Offshore Directorate Total core sample length [m]113.9Cores at the Norwegian Offshore Directorate Cores available for sampling?YES -
Core photos
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Palynological slides at the Norwegian Offshore Directorate
Palynological slides at the Norwegian Offshore Directorate Sample depthDepth unitSample typeLaboratory2204.0[m]SWCSTATOIL2210.0[m]SWCSTATOI2214.0[m]SWCSTATOI2225.0[m]DC2237.0[m]DC2246.0[m]DC2255.0[m]DC2268.0[m]SWCSTATOIL2274.0[m]SWCSTATOI2282.0[m]SWCSTATOI2293.0[m]SWCSTATOI2308.0[m]SWCSTATOI2321.0[m]DC2330.0[m]DC2342.0[m]SWCSTATOIL2347.5[m]SWCSTATOI2354.5[m]SWCSTATOI2360.5[m]SWCSTATOI2366.5[m]SWCSTATOI2986.7[m]SWCRRI3054.5[m]SWCRRI3097.0[m]SWCRRI -
Lithostratigraphy
Lithostratigraphy Top depth [mMD RKB]Lithostrat. unit11084210882157215722102275237824892489258626432705301130653068 -
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]pdf20.70 -
Logs
Logs Log typeLog top depth [m]Log bottom depth [m]CBL VDL GR1082635CST21282381CST26592999CST30053111DLL MSFL22502550HDT CYBERDIP11523117ISF SON1102651ISF SON MSFL26373115LDT CNL GR11523115LDT GR5001167RFT23072484RFT26633107VELOCITY3003116 -
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 typeCONDUCTOR30169.036170.00.00LOTSURF.COND.20500.026515.01.49LOTINTERM.13 3/81152.017 1/21167.01.78LOTINTERM.9 5/82638.012 1/42650.01.80LOTOPEN HOLE3120.08 1/23120.00.00LOT -
Drilling mud
Drilling mud Depth MD [m]Mud weight [g/cm3]Visc. [mPa.s]Yield point [Pa]Mud typeDate measured1151.1458.0water based2001.0475.0water based8301.1260.0water based11151.1458.0water based17801.1669.0water based22651.2050.0water based23501.2551.0water based27701.3252.0water based -
Pressure plots
Pressure plots The pore pressure data is sourced from well logs if no other source is specified. In some wells where pore pressure logs do not exist, information from Drill stem tests and kicks have been used. The data has been reported to the NPD, and further processed and quality controlled by IHS Markit.Pressure plots Document nameDocument formatDocument size [MB]PDF0.21