6607/12-3
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General information
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Wellbore history
GeneralWell 6607/12-3 was drilled on the Jette prospect on the Dønna Terrace in the Norwegian Sea. The reservoir was assumed to be of a stacked type with several sealed reservoir levels. The primary objectives were to prove an economical hydrocarbon volume in the Jette structure, prove resources in all reservoirs and encounter the hydrocarbon-water contacts.Operations and resultsWildcat well 6607/12-3 was spudded with the semi-submersible installation West Alpha on 22 October 2012. During drilling 26” section a water kick with possible gas was taken at 1033 m. This resulted in a technical sidetrack at 769 m and a 20” casing was set at 985.2 m before the BOP and riser were connected. Further drilling proceeded without significant problems to TD at 4306 m in the Early Jurassic Åre Formation. The well was drilled with seawater and bentonite sweeps down to 990 m, with Performadril Spec 6a mud from 990 m to 2109 m, and with XP-07 Spec 14a oil based mud from 2109 m to TD.Gas was present in 4.3 m net pay sandstone stringers around 3781 m (Cenomanian) in the Lange Formation. The expected Garn Formation was not present in this well. The Ile Formation was encountered at 3996.6 m and contained gas. The gas/water contact was indicated at 4003 m based on Log data and PVT samples. Tofte Formation was encountered at 4140.8 m and had some shows, but was water bearing according to petrophysical analyses. Top Tilje was encountered at 4171.8 m. The uppermost interval consisted of inter-bedded claystone/sandstone with poor reservoir quality. However, at approximately 4205 m, a more “clean” sandstone interval was encountered. This sandstone was water bearing as well. The Åre Formation had one meter gas-bearing sandstone at 4283 m. Hydrocarbon shows (fluorescence) were described in the Ile Formation from 3995 to 4054 m, in the Tofte Formation from 4138 m to 4162 m, and in the Båt Group from 4225 m to 4255 m, otherwise no oil shows were seen in the well.Two cores were cut. Core 1 was cut from 4001 m to 4055 m in the Ile Formation with 97% recovery. Core 2 was cut in the Tilje Formation from 4204 m to 4258 m cores were cut and no wire line logs were run in the well. MDT fluid samples were taken at 3778.8 m in the Lange Formation (gas), 3996.5 m in the Ile Formation (gas), 4088 m in the Ile Formation (water), and at 4283 m in the Åre Formation (gas).The well was permanently abandoned on 26 December 2012 as a gas discoveryTestingNo 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]1000.004305.00 -
Cores at the Norwegian Offshore Directorate
Cores at the Norwegian Offshore Directorate Core sample numberCore sample - top depthCore sample - bottom depthCore sample depth - uom14001.04054.9[m ]24204.14257.4[m ]Cores at the Norwegian Offshore Directorate Total core sample length [m]107.2Cores at the Norwegian Offshore Directorate Cores available for sampling?YES -
Oil samples at the Norwegian Offshore Directorate
Oil samples at the Norwegian Offshore Directorate Test typeBottle numberTop depth
MD [m]Bottom depth
MD [m]Fluid typeTest timeSamples availableMDT0.000.00CONDENSATEYES -
Lithostratigraphy
Lithostratigraphy Top depth [mMD RKB]Lithostrat. unit3813811348164416441798179819001940194021222783298229823005383738553855394639463997411341134141416441724271 -
Logs
Logs Log typeLog top depth [m]Log bottom depth [m]AIT LDS APS HNGS GR39504309CMR39054306MDT32773806MDT39603997MDT39644296MDT DP39964283MSIP38504306MWD - DVDM6 TELE42584306MWD - ECOSCOPE40014204MWD - PDX5 ARCVRES TELE VSON9903898MWD -ECOSCOPE STETHOSCOPE39984001SBT21003896 -
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 typeCONDUCTOR30444.036450.00.00SURF.COND.20985.026990.01.57FITINTERM.142100.017 1/22109.01.76FITINTERM.9 5/83896.012 1/43898.01.88FITOPEN HOLE4306.08 1/24306.00.00 -
Drilling mud
Drilling mud Depth MD [m]Mud weight [g/cm3]Visc. [mPa.s]Yield point [Pa]Mud typeDate measured10001.5037.0Performadril10501.3114.0Performadril16401.4239.0Performadril17471.4341.0Performadril18031.5051.0Performadril21091.5051.0Performadril22421.5529.0XP-07 - #1432461.6729.0XP-07 - #1434671.6439.0XP-07 - #1438981.7834.0XP-07 - #1438981.8035.0XP-07 - #1439191.7833.0XP-07 - #1440011.7834.0XP-07 - #1442221.6727.0XP-07 - #1443061.6727.0XP-07 - #14 -
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]PDF0.27