8/3-2
Eksport: PDF
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Generell informasjon
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Brønnhistorie
GeneralWell 8/3-2 is located in the Egersund Basin in the North Sea. The primary objective of 8/3-2 was to test possible hydrocarbon accumulations in sandstones of Middle Jurassic and Triassic sandstones.Operations and resultsWildcat well 8/3-2 was spudded with the Semi-submersible installation West Vanguard on 4 October 1982 and drilled to TD at 2657 m in the Triassic Skagerrak Formation. This was the first well drilled by West Vanguard. Drilling of the 36" and 26" sections were without incident, however the BOP stack required extensive repair and eight days were spent waiting on parts and repairs. Gumbo caused some delay in the 17 1/2" section. The well was drilled with spud mud down to 501 m, with polymer/gypsum mud from 501 m to 1150 m, and with gel/lignosulphonate mud from 1150 m to TD. The well encountered Middle Jurassic (Bryne Formation) sandstones with good reservoir properties from 2375 m to 2417 m.This was thinner than expected. A thin sandstone sequence was encountered from 2465 m to 2474 m in the underlying Skagerrak Formation. Some shows were recorded in shales from the interval 2088 m to 2355. The lower part of the Tau Formation is a "hot shale" characterized by very high gamma ray readings. No shows were seen in the porous sections and electrical logs and RFT pressure gradients confirmed water wet reservoirs. Organic geochemical analyses proved excellent source rock potential in the Late Jurassic shales, with TOC in the range 2 % to 7 % and hydrogen index in the range 250 to 600 mg HC/g TOC. Best potential is seen in the Tau Formation. The well is immature for oil and gas generation with %Ro = 0.45 - 0.5 towards TD. The analyses indicate shows of wet gas in the Bryne Formation sandstones, but otherwise confirm the shows recorded during drilling. Two conventional cores were taken in the interval 2384 m to2397.3 m in the Bryne Formation. No fluid samples were taken.The well was permanently abandoned on 4 December 1982 as a dry hole.TestingNo drill stem test was performed. -
Borekaks i Sokkeldirektoratet
Borekaks i Sokkeldirektoratet Borekaks tilgjengelig for prøvetaking?NOBorekaks i Sokkeldirektoratet Borekaksprøve, topp dybde [m]Borekaksprøve, bunn dybde [m]168.002655.00 -
Borekjerner i Sokkeldirektoratet
Borekjerner i Sokkeldirektoratet Kjerneprøve nummerKjerneprøve - topp dybdeKjerneprøve - bunn dybdeKjerneprøve dybde - enhet12384.02388.5[m ]22389.02397.3[m ]Borekjerner i Sokkeldirektoratet Total kjerneprøve lengde [m]12.8Borekjerner i Sokkeldirektoratet Kjerner tilgjengelig for prøvetaking?YES -
Kjernebilder
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Palynologiske preparater i Sokkeldirektoratet
Palynologiske preparater i Sokkeldirektoratet Prøve dybdeDybde enhetPrøve typeLaboratorie1609.0[m]SWCGRHRT1624.0[m]SWCGRHRT1758.0[m]SWCGRHRT1792.2[m]SWCGRHRT1819.0[m]SWCGRHRT1844.3[m]SWCGRHRT1898.5[m]SWCGRHRT1931.6[m]SWCGRHRT2026.0[m]SWCGRHRT2091.8[m]SWCGRHRT2102.0[m]SWCGRHRT2119.0[m]SWCGRHRT2128.0[m]SWCGRHRT2145.5[m]SWCGRHRT2155.0[m]SWCGRHRT2199.5[m]SWCGRHRT2245.0[m]SWCGRHRT2277.0[m]SWCGRHRT2288.2[m]SWCGRHRT2359.0[m]SWCGRHRT2373.5[m]SWCGRHRT -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet1004861017101710391050111511151152160416041650202520252075220022902375237524172417 -
Spleisede logger
Spleisede logger Dokument navnDokument formatDokumentstørrelse [MB]pdf0.50 -
Geokjemisk informasjon
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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]pdf0.15pdf0.20 -
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk)
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk) Dokument navnDokument formatDokumentstørrelse [MB]pdf26.85 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]CBL VDL GR4001133CST GR5931143CST GR15932643HDT CYBERDIP15502654ISF BHC GR1632656LDL CNL GR11352657LDL GR1631141NGS GR15502647RFT GR23762640VELOCITY2892630 -
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 formasjonstestCONDUCTOR30165.036165.00.00LOTSURF.COND.20485.026501.01.48LOTINTERM.13 3/81135.017 1/21151.01.62LOTOPEN HOLE2657.012 1/42657.00.00LOT -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling1851.10waterbased4501.12waterbased6601.10waterbased8101.14waterbased13351.17waterbased16751.20waterbased22551.36waterbased25901.32waterbased26401.33waterbased -
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]pdf0.21