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 -
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 -
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 -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet12983519522244224422722289249227112734 -
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]pdf1.43pdf0.51 -
Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter
Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter Dokument navnDokument formatDokumentstørrelse [MB]pdf0.24 -
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