25/2-2
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Generell informasjon
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Brønnhistorie
GeneralWell 25/2-2 is located east of the Frigg Field and south of the Frigg Øst Field, on the top of an E-W trending structure. The well was drilled to appraise the 25/2-1 Øst Frigg Discovery made in September 1973. The main target was lower Eocene sands where seismic sections displayed a bright spot in the western part of the closure just below the Frigg sand horizon. Secondary targets were Danian and Maastrichtian sands.Operations and resultsAppraisal well 25/2-2 was spudded with the semi-submersible installation Deepsea Driller on 31 May 1974 and drilled to TD at 2740 m in the Late Cretaceous Shetland Group.Top Early Eocene sands (Frigg Formation) were encountered at 1949 m, 23 m lower than prognosed. The Hermod Formation came in at 2269 m while Danian sand (Ty Formation) was encountered at 2563 m and chalky limestone (Shetland Group) at 2703 m. Hermod and Ty were water wet. An increase in C1 and C2 at around 1950 m during drilling marked the top of the Frigg Formation reservoir. From electrical logs, FIT's and the DST Gas/oil and oil/water contacts were set at 1964.2 m and 1974.4 m, respectively. Three cores were cut from 1991 to 2012.5 m. The cores consisted almost entirely of sand with only some thin interbeds of silt in core number 2. Down to 2011 m the cored sands were brown coloured from oil stain, and direct fluorescence and cuts were very strong. No shows were observed from 2011 m to 2015.5 m in the base 1.5 m of core number 3. The DST carried out in the cored interval produced only water. Weak shows were recorded in the Ty Formation sands. Two FIT's at 1952 and 1968.2 in the Frigg Formation reservoir sampled gas and oil and recorded formation temperatures of 57.6 °C and 57.9 °C, respectively.The well was permanently abandoned on 11 July 1974 as an oil and gas appraisal.TestingDST 1 carried out from 1983 to 1996 m produced 5.1 m3 of salt water (53 g/1). -
Borekaks i Sokkeldirektoratet
Borekaks i Sokkeldirektoratet Borekaks tilgjengelig for prøvetaking?YESBorekaks i Sokkeldirektoratet Borekaksprøve, topp dybde [m]Borekaksprøve, bunn dybde [m]460.002740.00 -
Borekjerner i Sokkeldirektoratet
Borekjerner i Sokkeldirektoratet Kjerneprøve nummerKjerneprøve - topp dybdeKjerneprøve - bunn dybdeKjerneprøve dybde - enhet11991.02001.5[m ]22002.02004.0[m ]32004.02012.5[m ]Borekjerner i Sokkeldirektoratet Total kjerneprøve lengde [m]21.0Borekjerner i Sokkeldirektoratet Kjerner tilgjengelig for prøvetaking?YES -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet129887194921962196226322692363256327032703 -
Spleisede logger
Spleisede logger Dokument navnDokument formatDokumentstørrelse [MB]pdf0.31 -
Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter
Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter Dokument navnDokument formatDokumentstørrelse [MB]pdf0.25 -
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk)
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk) Dokument navnDokument formatDokumentstørrelse [MB]pdf15.49pdf1.31pdf0.17pdf1.04pdf6.72pdf6.72pdf0.45pdf0.90pdf0.49pdf3.66pdf0.47pdf0.17pdf0.50pdf2.26pdf0.35 -
Borestrengtester (DST)
Borestrengtester (DST) Test nummerFra dybde MD
[m]Til dybde MD
[m]Reduksjonsventil størrelse
[mm]1.0198319960.0Borestrengtester (DST) Test nummerEndelig avstengningstrykk
[MPa]Endelig strømningstrykk
[MPa]Bunnhullstrykk
[MPa]Borehullstemperatur
[°C]1.0Borestrengtester (DST) Test nummerOlje produksjon
[Sm3/dag]Gass produksjon
[Sm3/dag]Oljetetthet
[g/cm3]Gasstyngde rel. luftGOR
[m3/m3]1.0 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]BHC GR1201917BHC GR19102720CBL13401910CNT FDC19102097CNT FDC19102721DLL19102720HDT19102721IES4401917IES19102721IES19102097ML MLL19102721VELOCITY00 -
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 formasjonstestCONDUCTOR30165.036166.00.00LOTSURF.COND.13 3/8442.017 1/2444.00.00LOTINTERM.9 5/81912.012 1/41914.00.00LOTOPEN HOLE2740.08 1/22740.00.00LOT -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling9041.1343.0water based19231.3352.0water based22741.2355.0water based26811.2448.0water based27401.2348.0water 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]pdf0.22