15/8-1
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Generell informasjon
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Brønnhistorie
GeneralWildcat well 15/8-1 was drilled west of the Sleipner field, ca 2 km from the UK border. The well was designed to test possible hydrocarbon accumulation in the sandstones of middle Jurassic age.Operations and resultsWildcat well 15/8-1 was spudded with the semi-submersible installation Glomar Biscay II on 18 July 1981 and drilled to TD at 4300 m in the Middle Jurassic Fladen Group. Drilling operations were performed without significant problems in the 36", 26" and 17 1/2" holes. Pipe stuck in the 12 1/4" hole at 2254 m and several times in the 8 1/2" hole. Miscellaneous technical problems occurred while drilling the 6" hole and a gas kick was at 4265 m while tripping. The well was drilled with seawater and gel down to 500 m and with gypsum mud from 500 m to 2890 m. Lignosulphonate was added from 1570 m, and from 2890 m to TD the gypsum mud was gradually depleted and replaced with a gel/lignosulphonate mud.The well 15/8-1 proved gas and condensate in sandstone of Middle Jurassic age. The gas/water contact was indicated at 3698 m from the Formation Multi Tester. Oil shows were recorded from 3065 m to 3075 m in the Hod Formation. Five conventional cores were cut in the interval 3658 m to 3705.5 m in the Hugin Formation. Three samples were attempted taken during FMT runs. Due to technical malfunctions only 1 sample (from 3668 m) was obtained.The well was permanently abandoned on 7 January 1982 as a gas/condensate discovery.TestingOne drill stem test was performed in the Sleipner formation and three in the Hugin Formation. The procedure of the tests was similar; after initial flow and build up the well was flowed for approximately 660 min. producing gas/condensate. Test no. 4 was only flowed for 480 minutes. CO2 was produced in all tests, in concentrations ranging from 4% to 15%, and up to 8 ppm H2S was recorded in DST2. Two sets of PVT samples were taken at the separator during all 4 tests.DST1 from 4079 m to 4094 m in the Sleipner Formation produced 427000 Sm3 gas and 316 Sm3 condensate/day on a 19.1 mm choke. The gas/condensate ratio (CGR) was 1351 m3/m3. DST2 from 3911 m to 3926 m produced 486000 Sm3 gas and 399 Sm3 condensate/day on a 16.7 mm choke, the CGR was 1218 m3/m3. DST3 from 3688 m to 3697 m produced 657000 Sm3 gas and 408 Sm3 condensate/day on a 22.2 mm choke. The CGR was 1610 m3/m3. DST4 from 3643 m to 3653 m produced 550000 Sm3 gas and 290 Sm3 condensate/day on a 22.2 mm choke. The CGR was 1897 m3/m3. -
Borekaks i Sokkeldirektoratet
Borekaks i Sokkeldirektoratet Borekaks tilgjengelig for prøvetaking?YESBorekaks i Sokkeldirektoratet Borekaksprøve, topp dybde [m]Borekaksprøve, bunn dybde [m]200.004298.00 -
Borekjerner i Sokkeldirektoratet
Borekjerner i Sokkeldirektoratet Kjerneprøve nummerKjerneprøve - topp dybdeKjerneprøve - bunn dybdeKjerneprøve dybde - enhet13658.03667.5[m ]23667.53678.6[m ]33678.83680.6[m ]43681.93699.0[m ]53699.03706.2[m ]Borekjerner i Sokkeldirektoratet Total kjerneprøve lengde [m]46.7Borekjerner i Sokkeldirektoratet Kjerner tilgjengelig for prøvetaking?YES -
Kjernebilder
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Oljeprøver i Sokkeldirektoratet
Oljeprøver i Sokkeldirektoratet Test typeFlaske nummerTopp dyp
MD [m]Bunn dyp
MD [m]Væske typeTest tidspunktPrøver tilgjengeligDSTTEST23911.003926.00WATER17.12.1981 - 00:00YESDSTTEST33688.003697.0024.12.1981 - 00:00YESDSTTEST43643.003653.0029.12.1981 - 00:00YES -
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 formasjonstestCONDUCTOR30187.036187.00.00LOTSURF.COND.20500.026515.01.71LOTINTERM.13 3/81185.017 1/21200.01.93LOTINTERM.9 5/82874.012 1/42890.01.75LOTLINER73990.08 1/23991.02.13LOTLINER4 1/24296.064300.00.00LOT -
Borestrengtester (DST)
Borestrengtester (DST) Test nummerFra dybde MD
[m]Til dybde MD
[m]Reduksjonsventil størrelse
[mm]1.04079408519.12.03911392616.73.03688369722.24.03543365322.2Borestrengtester (DST) Test nummerEndelig avstengningstrykk
[MPa]Endelig strømningstrykk
[MPa]Bunnhullstrykk
[MPa]Borehullstemperatur
[°C]1.02.03.04.0Borestrengtester (DST) Test nummerOlje produksjon
[Sm3/dag]Gass produksjon
[Sm3/dag]Oljetetthet
[g/cm3]Gasstyngde rel. luftGOR
[m3/m3]1.03164270000.7540.85113512.03994860000.8110.94412183.04086570000.8460.84016104.02905500000.7990.8321897 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]CBL VDL27003980CBL VDL39124265CDL CNL11252883CDL CNL28623982CDL CNL32123703CDL CNL39754301COREGUN28623982COREGUN39754302DIPLOG28623892DIPLOG39754302DLL MLL35853982DLL MLL39754301IEL AC160513IEL AC4901199IEL AC11252883IEL AC28403703IEL AC35853982IEL AC39654230IEL AC41504301MFT28623982MFT239754302TEMP1801152TEMP2402844VELOCITY5253980 -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet137879108813591926222523652365241824632510267527272825283028302841299832373335343634363445345235353535360536433643394541624162 -
Geokjemisk informasjon
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Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk)
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Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter
Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter Dokument navnDokument formatDokumentstørrelse [MB]pdf0.18pdf0.32 -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling2071.03seawater11611.12seawater13871.10seawater24001.19waterbased25821.24waterbased36581.38waterbased39911.38waterbased41471.36waterbased -
Palynologiske preparater i Sokkeldirektoratet
Palynologiske preparater i Sokkeldirektoratet Prøve dybdeDybde enhetPrøve typeLaboratorie3500.0[m]DC3530.0[m]DC3539.0[m]DC3560.0[m]DC3566.0[m]DC3575.0[m]DC3590.0[m]DC3596.0[m]C3605.0[m]C3620.0[m]DC3629.0[m]C3629.0[m]DCOD3638.0[m]DC3641.0[m]DC3641.0[m]DCOD3650.0[m]DCOD3650.0[m]DC3658.2[m]COD3663.6[m]C3671.0[m]COD3676.0[m]C3676.3[m]COD3677.0[m]DC3680.0[m]DC3680.5[m]DCOD3682.2[m]DCOD3683.4[m]DC3685.5[m]DCOD3686.0[m]C3688.1[m]COD3688.8[m]C3690.2[m]COD3698.5[m]COD3700.4[m]C3710.0[m]DC3713.0[m]DC3719.0[m]DCOD3740.0[m]DCOD3740.0[m]DC3761.0[m]DCOD3770.0[m]DC3773.0[m]DC3779.0[m]DCOD3800.0[m]DCOD3800.0[m]DC3809.0[m]DCOD3815.0[m]C3821.0[m]DCOD3821.0[m]DCOD3830.0[m]DC3833.0[m]DC3839.0[m]DCOD3860.0[m]DCOD3860.0[m]DC3881.0[m]DCOD3890.0[m]DC3899.0[m]DC3920.0[m]DC3920.0[m]DCOD3920.0[m]DCRRI3941.0[m]DC3941.0[m]DCOD3950.0[m]DC3955.0[m]DCOD3980.0[m]DC4010.0[m]DC4010.0[m]DCRRI4040.0[m]DC4070.0[m]DC4100.0[m]DC4130.0[m]DC4160.0[m]DC4190.0[m]DC4220.0[m]DC4250.0[m]DC4280.0[m]DC4298.0[m]DC