6306/6-1
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General information
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Wellbore history
GeneralWell 6306/6-1 was drilled on the Frøya High in the Møre I area off shore southern Mid Norway. The main objective was to prove HC accumulations in Late Jurassic Rogn Formation sandstones, the A-prospect.Operations and resultsWildcat well 6306/6-1 was spudded with the semi-submersible installation Ross Rig on 22 June 1994 and drilled to TD at 1317 m in basement rocks. No significant problems were encountered in the operations. The well was drilled with bentonite and seawater down to 432 m and with KCl/PAC mud from 432 m to TD.The Paleocene Egga sandstone unit was encountered at 604 m. The sandstones were rather silty; partly calcite cemented, and with reduced porosity due also to the presence of mica and glauconite. A 93 m thick Rogn Formation sandstone unit came in at 1158 m, sandwiched in Spekk Formation shales above and below. Under base Spekk a sequence of Middle Jurassic age (Fangst Group) was penetrated from 1267 m to 1281 m. Sandstones with occasional interbeds of claystone/shale grading to coals dominated this sequence. No shows were recorded in any section of the well while drilling, and since only questionable sandstone extracts were found in post-well organic geochemical analyses the well is concluded as dry. Very good source rocks are present in the well. The best source rock is seen in the upper Spekk section, which contain a typically marine anoxic, oil-prone Type II kerogen. The lower Spekk section has higher TOC, but is more terrestrial in composition and thus more gas/condensate -prone. Also the coaly shales and coals of the Middle Jurassic have very good potential for mixed oil and gas. The well is however immature all through with a vitrinite reflectance of about 0.45 % Ro at TD.One FMT run was performed in the Rogn Formation sandstone. Six pressure points gave a water gradient of 1.002 g/cm3. No fluid sample was taken.The well was permanently abandoned on 5 July as a dry hole.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]440.001317.00 -
Cores at the Norwegian Offshore Directorate
Cores at the Norwegian Offshore Directorate Core sample numberCore sample - top depthCore sample - bottom depthCore sample depth - uom11176.01194.8[m ]Cores at the Norwegian Offshore Directorate Total core sample length [m]18.8Cores 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 typeCONDUCTOR30356.036357.00.00LOTSURF.COND.13 3/8428.017 1/2430.01.44LOTINTERM.9 5/8750.012 1/4752.01.65LOTOPEN HOLE1317.08 1/21317.00.00LOT -
Logs
Logs Log typeLog top depth [m]Log bottom depth [m]CBL VDL(MAC)430750DIFL MAC ZDL CN SL7501317FMT GR11651237MWD - DPR TF4421756MWD - DPR TF47561176MWD - DPR TF411761317SWC GR8101317VSP4301315 -
Lithostratigraphy
Lithostratigraphy Top depth [mMD RKB]Lithostrat. unit3084864866057287289711039103911001137113711591252126712821312 -
Composite logs
Composite logs Document nameDocument formatDocument size [MB]pdf0.13 -
Geochemical information
Geochemical information Document nameDocument formatDocument size [MB]pdf1.81 -
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]pdf31.77 -
Drilling mud
Drilling mud Depth MD [m]Mud weight [g/cm3]Visc. [mPa.s]Yield point [Pa]Mud typeDate measured6101.2015.0DUMMY7561.2012.0DUMMY7591.2012.0DUMMY10501.2525.0DUMMY10961.2527.0DUMMY11601.2525.0DUMMY11911.2527.0DUMMY13171.2525.0DUMMY -
Palynological slides at the Norwegian Offshore Directorate
Palynological slides at the Norwegian Offshore Directorate Sample depthDepth unitSample typeLaboratory480.0[m]DCMILL500.0[m]DCMILL520.0[m]DCMILL540.0[m]DCMILL560.0[m]DCMILL580.0[m]DCMILL600.0[m]DCMILL620.0[m]DCMILL640.0[m]DCMILL660.0[m]DCMILL680.0[m]DCMILL700.0[m]DCMILL740.0[m]DCMILL760.0[m]DCMILL770.0[m]DCMILL780.0[m]DCMILL800.0[m]DCMILL810.0[m]DCMILL820.0[m]DCMILL830.0[m]DCMILL840.0[m]DCMILL850.0[m]DCMILL860.0[m]DCMILL870.0[m]DCMILL879.5[m]SWCSTATO887.5[m]SWCSTATO900.0[m]DCMILL910.0[m]DCMILL920.0[m]DCMILL925.5[m]SWCSTATO940.0[m]DCMILL950.0[m]DCMILL960.0[m]DCMILL969.0[m]DCMILL978.0[m]DCMILL987.0[m]DCMILL993.0[m]SWCSTATO1005.0[m]DCMILL1014.0[m]DCMILL1023.0[m]DCMILL1032.0[m]DCMILL1041.0[m]DCMILL1046.5[m]SWCSTATO1059.0[m]DCMILL1068.0[m]DCMILL1077.0[m]DCMILL1086.0[m]DCMILL1095.0[m]DCMILL1104.0[m]DCMILL1113.0[m]DCMILL1122.0[m]DCMILL1131.0[m]DCMILL1137.5[m]SWCSTATO1143.0[m]DCMILL1152.0[m]DCMILL1160.5[m]SWCSTATO1170.0[m]DCMILL1176.1[m]CAPT1177.0[m]CSTATOIL1178.6[m]CAPT1180.4[m]CAPT1182.0[m]CAPT1182.0[m]CSTATOIL1184.0[m]CAPT1186.2[m]CAPT1187.6[m]CAPT1189.0[m]CAPT1191.0[m]CAPT1193.3[m]CAPT1201.0[m]SWCSTATOIL1212.0[m]DCMILL1228.8[m]SWCSTATOIL1236.0[m]DCMILL1248.0[m]DCMILL1259.5[m]SWCSTATOIL1261.5[m]SWCSTATOI1267.0[m]DCMILL1273.0[m]DCMILL1276.0[m]DCMILL1279.0[m]DCMILL1282.0[m]DCMILL1285.0[m]DCMILL1297.0[m]DCMILL