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 -
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 -
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 -
Lithostratigraphy
Lithostratigraphy Top depth [mMD RKB]Lithostrat. unit3813811348164416441798179819001940194021222783298229823005383738553855394639463997411341134141416441724271 -
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