34/7-2
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Generell informasjon
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Brønnhistorie
GeneralWell 34/7-2 was drilled just north of the Tordis Øst discovery in the northern North Sea. The main objectives were to test for hydrocarbons in the Jurassic Statfjord Formation and in the Triassic Lunde Formation.Operations and resultsWildcat well 34/7-2 was spudded with the semi-submersible installation Treasure Saga on 2 September 1984 and drilled to TD at 2475 m in the Late Triassic Lunde Formation. A total of 83 hours rig time was NPT due to repairs resulting from a failed RIH with the 26" bit after underreaming to 816 m, and a leak in the acoustic system discovered after setting the 9 5/8" casing at 2031 m. The well was drilled with seawater and hi-vis pills down to 848 m, with KCl/polymer mud from 848 m to 2042 m, and with lignosulfonate mud from 2042 m to TD. No shallow gas was encountered.Except for the sandy Utsira Formation and two sandstone units in the Hordaland Group (in the order of 40 - 50 m each) the well proved mainly claystones down to the Statfjord Formation at 2152 m. At BCU (2085 m) there was a major hiatus from Pliensbachian to Campanian. The Lunde Formation was encountered at 2271 m. The gross thickness of the Statfjord in this well is 119 m with 43.5 m of net sand. The well drilled some 204 m into the Lunde Formation, which in the upper part proved a siltstone sequence with minor sandstone and claystone, while the lowermost 117 m proved a sequence of sandstones alternating with claystones. Of this sequence some 41.3 m could be considered as net. No live hydrocarbons were encountered by the well. Residual oil was found in base Amundsen - top Statfjord Formations, however, cores showed low porosity and essentially no net sand. Extraction data from geochemical analyses also indicate migrated hydrocarbons in the Shetland Group.Three cores totalling 28.8 m (recovered 22 m, 76% recovery) were cut across the stratigraphic border zone between Amundsen Formation (Dunlin Group) and Upper Statfjord Formation. The FMT tool was run to acquire pressure data and one FMT fluid sample was taken at 2110.5 m. It recovered only mud filtrate.The well was permanently abandoned on 10 October 1984 as a dry well.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]420.002475.00 -
Borekjerner i Sokkeldirektoratet
Borekjerner i Sokkeldirektoratet Kjerneprøve nummerKjerneprøve - topp dybdeKjerneprøve - bunn dybdeKjerneprøve dybde - enhet12147.32160.2[m ]22161.62164.0[m ]32168.62175.8[m ]Borekjerner i Sokkeldirektoratet Total kjerneprøve lengde [m]22.5Borekjerner i Sokkeldirektoratet Kjerner tilgjengelig for prøvetaking?YES -
Kjernebilder
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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 formasjonstestCONDUCTOR30394.036684.00.00LOTSURF.COND.20848.026861.01.58LOTINTERM.13 3/81549.017 1/21570.01.69LOTINTERM.9 5/82031.012 1/42042.01.88LOTOPEN HOLE2475.08 1/22475.00.00LOT -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]BHC GR21202472CALI394850CALI8481524CALI8481539CALI15502040CALI15532041CDL CNL GR20322468CDL DNL GR21202468CDL GR4841559CDL GR15502038COREGUN415845COREGUN8651557COREGUN15602025COREGUN17202470DIFL BHC GR394860DIFL BHC GR8481565DIFL BHC GR15502041DIFL BHC GR20322176DIFL BHC GR20322473DIPLOG20322471DL LMLL GR21202473FMT21382458FMT21522171GR0397SL20322463VELOCITY2722473 -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet27110261035122712821375141516401640164717571757184220852085215222712271 -
Geokjemisk informasjon
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Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk)
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk) Dokument navnDokument formatDokumentstørrelse [MB]pdf13.04 -
Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter
Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter Dokument navnDokument formatDokumentstørrelse [MB]pdf0.21pdf0.23 -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling3301.05100.020.0WATER BASED03.09.19843971.05100.020.0WATER BASED06.09.19844121.05100.020.0WATER BASED06.09.19846841.10100.020.0WATER BASED06.09.19848611.1315.025.0WATER BASED10.09.19848611.1615.030.0WATER BASED12.09.19848611.1610.041.0WATER BASED10.09.19848611.1615.030.0WATER BASED12.09.19848611.1610.041.0WATER BASED10.09.198415651.3741.021.0WATER BASED17.09.198415651.2216.021.0WATER BASED16.09.198415651.3741.021.0WATER BASED17.09.198415701.4442.024.0WATER BASED20.09.198417661.5046.020.0WATER BASED25.09.198420251.5946.020.0WATER BASED25.09.198420421.5947.016.0WATER BASED25.09.198420421.5947.016.0WATER BASED25.09.198420421.5950.020.0WATER BASED25.09.198421481.8055.012.0WATER BASED29.09.198421691.8055.018.0WATER BASED01.10.198421771.8055.017.0WATER BASED01.10.198422421.7250.014.0WATER BASED01.10.198423131.7150.016.0WATER BASED01.10.198424101.7150.016.0WATER BASED03.10.198424751.7145.015.0WATER BASED03.10.198424751.7144.014.0WATER BASED04.10.198424751.7145.012.0WATER BASED07.10.198424751.7151.013.0WATER BASED07.10.198424751.7144.014.0WATER BASED04.10.198424751.7151.013.0WATER BASED07.10.198424751.7145.012.0WATER BASED07.10.1984 -
Palynologiske preparater i Sokkeldirektoratet
Palynologiske preparater i Sokkeldirektoratet Prøve dybdeDybde enhetPrøve typeLaboratorie1048.0[m]SWCRRI1084.0[m]SWCRRI1138.0[m]SWCRRI1157.0[m]SWCRRI1192.0[m]SWCRRI1227.0[m]SWCRRI1287.0[m]SWCRRI1336.5[m]SWCRRI1426.0[m]SWCRRI1480.0[m]SWCRRI1560.0[m]DCRRI1580.0[m]DCRRI1595.0[m]SWCRRI1610.0[m]DCRRI1615.0[m]SWCRRI1620.0[m]DCRRI1650.0[m]SWCRRI1680.0[m]DCRRI1710.0[m]DCRRI1730.0[m]DCRRI1745.0[m]SWCRRI1784.0[m]DCRRI1814.0[m]DCRRI1844.0[m]DCRRI1863.0[m]SWCRRI1874.0[m]DCRRI1887.0[m]SWCRRI1905.0[m]SWCRRI1919.0[m]DCRRI1940.0[m]SWCRRI1953.0[m]SWCRRI1967.0[m]DCRRI1979.0[m]DCRRI1998.0[m]SWCRRI2010.0[m]SWCRRI2025.0[m]SWCRRI2039.0[m]DCRRI2040.0[m]SWCRRI2054.0[m]DCRRI2060.0[m]SWCRRI2069.0[m]DCRRI2077.5[m]SWCRRI2083.0[m]SWCRRI2084.0[m]DCRRI2099.0[m]DCRRI2114.0[m]DCRRI2127.0[m]SWCRRI2129.0[m]DCRRI2143.0[m]SWCRRI2144.0[m]DCRRI2148.7[m]CRRI2154.9[m]CRRI2162.8[m]CRRI2168.3[m]SWCRRI2189.0[m]DCRRI2193.0[m]SWCRRI2204.0[m]DCRRI2208.5[m]SWCRRI2300.0[m]DCRRI2340.0[m]DCRRI2360.0[m]DCRRI2420.0[m]DCRRI -
Tynnslip i Sokkeldirektoratet
Tynnslip i Sokkeldirektoratet DybdeEnhet4512.80[m ]4514.70[m ]4516.35[m ]4518.90[m ]