7122/7-5
Export:
PDF
![PDF icon](https://factpages.sodir.no/Images/file-pdf.png)
-
General information
-
Wellbore history
The 7122/7-5 well was drilled as an exploration well on the Goliat West Prospect, a downthrown fault compartment compared to the proved hydrocarbon accumulations of Goliat. The purpose of the well was to investigate the hydrocarbon potential of the Early Jurassic/Late Triassic Kap Toscana Group, the Late Triassic Snadd Formation, and the Middle Triassic Kobbe Formation and into the Early Triassic Havert Formation.Operations and resultsWildcat well 7122/7-5 was spudded with the semi-submersible installation Polar Pioneer on 28 November 2006 and drilled to TD at 2228 m. No significant technical problems were encountered during the operations. The well was drilled with sea water and hi-vis sweeps down to 1060 m. Formate mud previously used for drilling the 7122/7-1, -2, -3 and -4S was used from 1050 m to TD. The re-used formate mud was mixed with fresh formate mud in the proportion ca 1:2.The top of the Kap Toscana reservoir was found at 1181 m as prognosed. The top Snadd Formation reservoir was encountered at 1281 m, 12 m deeper than the prognosis. The third reservoir, in the Kobbe Formation was found at 1868 m, 4m deeper than the prognosis. A fourth reservoir in the Klappmyss Formation was encountered at 2126 m, 43m deeper than prognosis. The reservoirs were not hydrocarbon bearing. Oil shows were recorded on cuttings and core chips from 1868 to 1910 m in the upper part of the Kobbe Formation; otherwise no shows were reported from the well.One core was cut from 1900 to 1910.7 m in the Kobbe Formation. No wire line fluid samples were taken.The well was plugged back to 995 m and abandoned on 23 December as a dry well. It was decided to drill a sidetrack (7122/7-5 A) in order to explore the potential of the Kobbe Formation on the east up thrown side of the fault.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]1065.002228.00 -
Cores at the Norwegian Offshore Directorate
Cores at the Norwegian Offshore Directorate Core sample numberCore sample - top depthCore sample - bottom depthCore sample depth - uom11900.01910.8[m ]Cores at the Norwegian Offshore Directorate Total core sample length [m]10.8Cores at the Norwegian Offshore Directorate Cores available for sampling?YES -
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 typeCONDUCTOR30441.036445.00.00LOTSURF.COND.13 3/81015.017 1/21060.01.65LOTOPEN HOLE2228.012 1/42228.00.00LOT -
Logs
Logs Log typeLog top depth [m]Log bottom depth [m]MDT GR MSIP ACTS10152224MRLA TLD CNL GR ACTS10152224MWD - GR RES DIR PRESSURE394445MWD - GR RES DIR PRESSURE4452222MWD - GR RES SON DIR PRESSURE4451060 -
Lithostratigraphy
Lithostratigraphy Top depth [mMD RKB]Lithostrat. unit39464364365565596199810831168118111811281186818682126 -
Composite logs
Composite logs Document nameDocument formatDocument size [MB]pdf0.32 -
Drilling mud
Drilling mud Depth MD [m]Mud weight [g/cm3]Visc. [mPa.s]Yield point [Pa]Mud typeDate measured4451.03SEAWATER8931.03SEAWATER10601.03SEAWATER10601.178.0NACL10601.178.0NACL10701.2513.0NACL14751.2512.0FORMPRO19001.3012.0FORMPRO21111.3013.0FORMPRO22281.3213.0FORMPRO -
Palynological slides at the Norwegian Offshore Directorate
Palynological slides at the Norwegian Offshore Directorate Sample depthDepth unitSample typeLaboratory1900.6[m]CICHRON1906.4[m]CICHRON1909.8[m]CICHRON -
Thin sections at the Norwegian Offshore Directorate
Thin sections at the Norwegian Offshore Directorate DepthUnit1900.45[m ]1902.26[m ]1906.90[m ]1908.75[m ]1909.35[m ]