25/1-3
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Generell informasjon
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Brønnhistorie
GeneralWell 25/1-3 was drilled to appraise the eastward extension of the 25/1-1 Frigg Discovery on the Frigg Ridge in the North Sea. The primary objective was to test the Eocene sandstones that were gas bearing in well 25/1-1.Operations and resultsAppraisal well 25/1-3 was spudded with the semi-submersible installation Pentagone 81 on 14 November 1971 and drilled to TD at 2872 m in the Late Cretaceous Shetland Group. The well was drilled with seawater down to 405 m and with a seawater/LFC mud from 405 m to TD.The target Eocene sandstones (Frigg Formation) was penetrated at 1952 m. The gross thickness was 217 m and the N/G was 0.82 with porosities ranging from 28 to 33%. It was gas bearing down to the GOC at 1973 m and oil bearing down to the OWC at 1982.5 m. Good oil shows on cores were recorded throughout the hydrocarbon-bearing reservoir. Weaker oil shows on cores were described ("fluo but salty taste") below the OWC.Three cores were cut from 1951 to 2005 m in the Frigg reservoir. Total recovery for these three cores was 42.25 m (78.2% recovery). A fourth core was cut from 2563 to 2568 m with 50% recovery. FIT fluid samples were attempted at 2550.5 m and 2576.3 m but only mud and filtrate was recovered.The well was permanently abandoned on 27 January 1972 as an oil and gas appraisal wellTestingSix drill stem tests were conducted.DST 1, 2 and 3 tested the interval 1985 to 1987 m. All three tests produced water.DST 4 and 5 tested the interval 1978 to 1980 m. DST 4 produced 21.5 Sm3 oil/day and DST 5 produced 70 Sm3 oil/day. The maximum temperature in these tests was reported to be 63 °C.DST 6 tested the interval 1976 to 1980 m and produced in the final flow; through a 24/64" choke an average of 14400 Sm3 gas and 136 Sm3 oil /day. The corresponding GOR is 106 Sm3/Sm3. -
Borekaks i Sokkeldirektoratet
Borekaks i Sokkeldirektoratet Borekaks tilgjengelig for prøvetaking?YESBorekaks i Sokkeldirektoratet Borekaksprøve, topp dybde [m]Borekaksprøve, bunn dybde [m]420.002870.00 -
Borekjerner i Sokkeldirektoratet
Borekjerner i Sokkeldirektoratet Kjerneprøve nummerKjerneprøve - topp dybdeKjerneprøve - bunn dybdeKjerneprøve dybde - enhet11951.01965.3[m ]21969.01982.9[m ]31991.12005.0[m ]42563.02565.5[m ]Borekjerner i Sokkeldirektoratet Total kjerneprøve lengde [m]44.6Borekjerner i Sokkeldirektoratet Kjerner tilgjengelig for prøvetaking?YES -
Palynologiske preparater i Sokkeldirektoratet
Palynologiske preparater i Sokkeldirektoratet Prøve dybdeDybde enhetPrøve typeLaboratorie1775.0[m]DC1795.0[m]DC1815.0[m]DC1835.0[m]DC1855.0[m]DC1875.0[m]DC1895.0[m]DC1925.0[m]DC1930.0[m]DC1935.0[m]DC1945.0[m]DC2025.0[m]DC2045.0[m]DC2065.0[m]DC2085.0[m]DC2105.0[m]DC2125.0[m]DC2145.0[m]DC2160.0[m]DC2180.0[m]DC2200.0[m]DC2220.0[m]DC2245.0[m]DC2265.0[m]DC2285.0[m]DC2305.0[m]DC2325.0[m]DC2345.0[m]DC2365.0[m]DC2385.0[m]DC2405.0[m]DC2425.0[m]DC2448.0[m]DC2476.0[m]DC2496.0[m]DC2516.0[m]DC2536.0[m]DC2552.0[m]DC2564.0[m]CIGS -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet12983519522244224422722289249227112734 -
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]pdf0.24 -
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk)
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk) Dokument navnDokument formatDokumentstørrelse [MB]pdf1.43pdf0.51 -
Borestrengtester (DST)
Borestrengtester (DST) Test nummerFra dybde MD
[m]Til dybde MD
[m]Reduksjonsventil størrelse
[mm]1.0198519870.02.0198519870.03.0198519870.04.0197819800.05.0197819800.06.0197619800.0Borestrengtester (DST) Test nummerEndelig avstengningstrykk
[MPa]Endelig strømningstrykk
[MPa]Bunnhullstrykk
[MPa]Borehullstemperatur
[°C]1.02.03.04.05.06.0Borestrengtester (DST) Test nummerOlje produksjon
[Sm3/dag]Gass produksjon
[Sm3/dag]Oljetetthet
[g/cm3]Gasstyngde rel. luftGOR
[m3/m3]1.02.03.04.0215.0706.084110 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]BHC1502869CBL15002011CDM AP18832873DL18822869FDC18822874IES4072869ML MLL18832872SNP18822874SRS4072873 -
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 formasjonstestCONDUCTOR30165.036165.00.00INTERM.13 3/8405.017 1/2415.00.00SURF.COND.9 5/81880.012 1/41886.00.00LINER72036.08 1/22872.00.00 -
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