34/8-6
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Generell informasjon
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Brønnhistorie
GeneralWell 34/8-6 was designed to drill North of the Visund Field on a northerly trending arm of the Tampen Spur. The main structural feature in block 34/8, the A-structure, is a NNE-SSW oriented elongated rotated fault block with pre-Cretaceous strata dipping towards the WNW. The block contains the Visund field, and is divided into two compartments, the A-south and the A-north, by a central fault. The well will test a stratigraphic trap on the northwest flank of the A-structure. From seismic anomalies possible shallow gas was expected at 510 m, 544 m, 556 m, and 877 m. Levels at 544 m, and 556 m are dipping sand layers, and could contain gas with overpressure. Scattered boulders could be expected between 424and 540 m.The primary objective for well 34/8-6 was to test the presence of a hydrocarbon-bearing sand within the Upper Jurassic Draupne Formation, and was drilled close to the thickest portion of the interpreted turbidite sand. Secondary objectives were to drill through the Brent Group to yield more information about development and thickness control down dip of the structural crest, and to tag top of the Dunlin Group to permit a good seismic tie-in, which can be carried up dip towards the Visund reservoir.Operations and resultsWildcat well 34/8-6 was spudded with the semi-submersible installation Transocean 8 on 21 September 1991 and at a depth of 3950 m in the Early Jurassic Drake Formation. The well was drilled with spud mud down to 1235 m and with KCl mud from 1235 m to TD. Drilling went on without any significant problems. Shallow gas indications were encountered during drilling of the 8 1/2" pilot hole at 541 m and 550 m, but caused no problems, and no gas was observed at the wellhead during drilling operations. The gas indications did not correspond with any of the predicted sand layers.There was no sandstone developed at the primary objective in the Draupne Formation. Crude oil appeared in the mud after penetrating a thin (1 m) limestone at 3180 m in the Kyrre Formation. Oil was seen in the mud down to 3500 m, but it was believed that it all came from the limestone at 3180 m. One core was cut in the Draupne Formation from 3572 m to 3584 m. Two runs of sidewall cores were attempted whereof 19 were recovered. The well was permanently abandoned on 3 November 1991 as a dry hole with hydrocarbon shows.TestingNo drill stem test was performed -
Borekaks i Sokkeldirektoratet
Borekaks i Sokkeldirektoratet Borekaks tilgjengelig for prøvetaking?YESBorekaks i Sokkeldirektoratet Borekaksprøve, topp dybde [m]Borekaksprøve, bunn dybde [m]1240.003950.00 -
Borekjerner i Sokkeldirektoratet
Borekjerner i Sokkeldirektoratet Kjerneprøve nummerKjerneprøve - topp dybdeKjerneprøve - bunn dybdeKjerneprøve dybde - enhet13572.03584.6[m ]Borekjerner i Sokkeldirektoratet Total kjerneprøve lengde [m]12.6Borekjerner i Sokkeldirektoratet Kjerner tilgjengelig for prøvetaking?YES -
Kjernebilder
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Palynologiske preparater i Sokkeldirektoratet
Palynologiske preparater i Sokkeldirektoratet Prøve dybdeDybde enhetPrøve typeLaboratorie1610.0[m]DCRRI1630.0[m]DCRRI1650.0[m]DCRRI1670.0[m]DCRRI1690.0[m]DCRRI1710.0[m]DCRRI1720.0[m]DCRRI1750.0[m]DCRRI1770.0[m]DCRRI1790.0[m]DCRRI1810.0[m]DCRRI1830.0[m]DCRRI1850.0[m]DCRRI1870.0[m]DCRRI1890.0[m]DCRRI1910.0[m]DCRRI1920.0[m]DCRRI1930.0[m]DCRRI1960.0[m]DCRRI1980.0[m]DCRRI2000.0[m]DCRRI2020.0[m]DCRRI2050.0[m]DCRRI2070.0[m]DCRRI2090.0[m]DCRRI2110.0[m]DCRRI2130.0[m]DCRRI2150.0[m]DCRRI2485.0[m]SWCHYDRO2667.0[m]SWCHYDRO3246.0[m]SWCHYDRO3284.5[m]SWCHYDRO3305.5[m]SWCHYDRO3325.0[m]SWCHYDRO3370.0[m]SWCHYDRO3401.0[m]SWCHYDRO3488.0[m]SWCHYDRO3572.0[m]CHYDRO3574.8[m]CHYDRO3576.0[m]CHYDRO3579.2[m]CHYDRO3582.0[m]CHYDRO3584.1[m]CHYDRO3632.0[m]SWCHYDRO3676.0[m]SWCHYDRO -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet400115911781402142118911891191619252127214521452340335234183418344034683477347735813686368637063724375738803880 -
Spleisede logger
Spleisede logger Dokument navnDokument formatDokumentstørrelse [MB]pdf0.51 -
Geokjemisk informasjon
Geokjemisk informasjon Dokument navnDokument formatDokumentstørrelse [MB]pdf0.92 -
Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter
Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter Dokument navnDokument formatDokumentstørrelse [MB]pdf0.71pdf0.22 -
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk)
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk) Dokument navnDokument formatDokumentstørrelse [MB]pdf13.83 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]CST GR24503930CST GR25153930DIL LSS GR SP AMS4851202DIL LSS GR SP AMS12212410DIL LSS GR SP AMS24023948FMS-4 NGT AMS31003940LDL CNL24023948MWD GR RES DIR4003898RFT HP GR36863825VSP11103880 -
Foringsrør og formasjonsstyrketester
Foringsrør og formasjonsstyrketester Type utforingUtforing diam.
[tommer]Utforing dybde
[m]Brønnbane diam.
[tommer]Brønnbane dyp
[m]LOT/FIT slam eqv.
[g/cm3]Type formasjonstestCONDUCTOR30485.036486.50.00LOTINTERM.18 5/81219.0241235.00.00LOTINTERM.13 3/82407.017 1/22423.01.62LOTOPEN HOLE3950.012 1/43950.00.00LOT -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling4151.3614.05.0WATER BASED04.11.19914151.4618.06.0WATER BASED04.11.19914161.0522.017.0WATER BASED23.09.19914871.2016.09.0WATER BASED23.09.19914871.2016.09.0WATER BASED24.09.19919881.2017.09.0WATER BASED25.09.199110891.5019.06.0WATER BASED04.11.199112071.2017.09.0WATER BASED27.09.199112351.2016.09.0WATER BASED01.10.199112351.208.08.0WATER BASED01.10.199112351.2017.09.0WATER BASED27.09.199112351.2016.08.0WATER BASED01.10.199116741.2012.09.0WATER BASED01.10.199121641.3015.013.0WATER BASED02.10.199122311.3014.013.0WATER BASED03.10.199124231.3517.014.0WATER BASED04.10.199124231.3518.012.0WATER BASED07.10.199124231.3516.010.0WATER BASED07.10.199124231.3516.09.0WATER BASED08.10.199124231.3516.09.0WATER BASED07.10.199124391.3514.09.0WATER BASED09.10.199125271.4116.010.0WATER BASED10.10.199127801.4017.010.0WATER BASED11.10.199130451.4017.09.0WATER BASED15.10.199131661.4017.09.0WATER BASED15.10.199132231.4519.010.0WATER BASED15.10.199132781.4519.010.0WATER BASED17.10.199133621.4518.010.0WATER BASED17.10.199133651.4519.010.0WATER BASED18.10.199133721.5020.011.0WATER BASED18.10.199133721.4917.09.0WATER BASED21.10.199133721.4917.09.0WATER BASED21.10.199134221.5119.010.0WATER BASED21.10.199135241.6025.010.0WATER BASED22.10.199135761.6025.011.0WATER BASED23.10.199136061.6024.09.0WATER BASED24.10.199136901.6125.09.0WATER BASED25.10.199137951.6125.010.0WATER BASED29.10.199139501.6023.08.0WATER BASED29.10.199139501.6023.08.0WATER BASED29.10.199139501.6025.010.0WATER BASED31.10.199139501.5017.04.0WATER BASED01.11.1991 -
Trykkplott
Trykkplott Porertrykksdataene kommer fra logging i brønnen hvis ingen annen kilde er oppgitt. I noen brønner der trykk ikke er logget, er det brukt informasjon fra formasjonstester eller brønnspark. Trykkdataene er rapportert inn til Oljedirektoratet og videre prosessert og kvalitetssikret av IHS Markit.Trykkplott Dokument navnDokument formatDokumentstørrelse [MB]pdf0.22