25/2-6
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Generell informasjon
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Brønnhistorie
GeneralExploration well 25/2-6 was located in the Viking Graben on the same main structure as well 25/2-5 targeting the Jurassic were oil bearing, while the Statfjord sands gave good oil shows. 25/2-6 was drilled on the northwestern flank of a structure that was about ten years later discovered as the Frøy Field.The well is Type Well for the Hermod Formation.Operations and resultsThe well was spudded with the semi-submersible installation Polyglomar Driller on 1 August 1977 and drilled to TD at 3750 m in the Triassic Smith Bank Formation.The well penetrated two Paleocene sands, the Hermod Formation from 2221 m to 2361 m and the Ty Formation from 2563 m to 2631 m. No shows were recorded in these sands. The Jurassic contained two major sandy but somewhat heterolithic sequences in the Vestland Group and Statfjord Formation.Four conventional cores were cut in the well, one from 3159.6 m to 3165 m in the Heather Formation, two from 3253.4 m to 3271.8 m in the Hugin and Sleipner formations, and one from 3509 .7 m to 3518.9 m in the Statfjord Formation. Good oil shows were recorded on the lower part of the Statfjord core. An extensive pressure and fluid sampling programme was carried out in the Jurassic with 19 RFT samples from the interval 3242.5 m in the Vestland Group and 24 RFT samples and four FIT samples from the interval 3505.1 m to 3648 m in the Statfjord Formation. Fluid samples were taken from four depths in the Sleipner and Hugin formations (3243.3 m, 3257.8 m, 3267.5 m, and 3286 m). Only one of the samples (3286 m) recovered fluid that was representative for the formation and this sample contained water with dissolved gas. In the Statfjord Formation Test No. 28 at 3563 m recovered after 7 minutes 2 litres of oil, 7 litres of gas, and 1.5 litres of emulsion. Test No. 38 at 3568,3 m recovered 0,35 litres of oil, 110 litres of gas, and 2,65 litres of mud and filtrate. From the test results, the log analysis, and fluorescence on sidewall cores, the Statfjord formation was found oil-bearing in a good sand interval from 3559 m to 3571 m.The well was permanently abandoned on 15 November 1977 as an appraisal well for the Lille Frøy Discovery and with minor oil in the Statfjord formation.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]200.003756.00 -
Borekjerner i Sokkeldirektoratet
Borekjerner i Sokkeldirektoratet Kjerneprøve nummerKjerneprøve - topp dybdeKjerneprøve - bunn dybdeKjerneprøve dybde - enhet13159.63165.1[m ]23253.43262.4[m ]33262.43271.8[m ]43509.73518.7[m ]Borekjerner i Sokkeldirektoratet Total kjerneprøve lengde [m]32.9Borekjerner i Sokkeldirektoratet Kjerner tilgjengelig for prøvetaking?YES -
Oljeprøver i Sokkeldirektoratet
Oljeprøver i Sokkeldirektoratet Test typeFlaske nummerTopp dyp
MD [m]Bunn dyp
MD [m]Væske typeTest tidspunktPrøver tilgjengeligRFT3561.000.00WATERNORFT3267.000.00WATERYES -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet141500550897926109614031491214821482209222123612463256326312631293130213083308331373241324132573317350437053705 -
Spleisede logger
Spleisede logger Dokument navnDokument formatDokumentstørrelse [MB]pdf0.43 -
Geokjemisk informasjon
Geokjemisk informasjon Dokument navnDokument formatDokumentstørrelse [MB]pdf0.82PDF0.13PDF4.92 -
Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter
Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter Dokument navnDokument formatDokumentstørrelse [MB]pdf0.45 -
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk)
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk) Dokument navnDokument formatDokumentstørrelse [MB]pdf48.39PDF5.04pdf14.67pdf2.84 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]BHC GR28243104BHC GR30003135BHC GR31283218BHC GR ISF31283356BHC GR ISF33253542CAL31283750CBL516847CBL15752824CBL24503144CBL25893201DLL MSFL32253745FDC GR CNL31273356GR SPEC31283750HDT7423747ID7422834ID7504625ISF28253135ISF31283799ISF SL GR141712VELOCITY00 -
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 formasjonstestCONDUCTOR30190.036190.00.00LOTSURF.COND.20750.026750.00.00LOTINTERM.13 3/82824.017 1/22839.00.00LOTINTERM.9 5/83126.012 1/43135.00.00LOTOPEN HOLE3750.08 1/23750.00.00LOT -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling1901.07spud mud7121.0760.0water based18581.1637.0water based28391.2545.0water based30711.3058.0water based37501.3555.0water based -
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]pdf0.23