25/4-2
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Generell informasjon
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Brønnhistorie
GeneralWell 25/4-2 was drilled ca 6 km ENE of the 25/4-1 Heimdal Discovery well, which encountered 106 m gas-bearing sands gas in the Paleocene Heimdal Formation and several thin sands with gas and oil in the Jurassic and late Triassic. The aim of well 25/4-2 was to explore the Heimdal sand section on a separate closure.Operations and resultsWildcat well 25/4-2 was spudded with the semi-submersible installation Neptune 7 on 18 October 1973 and drilled to TD at 2775 m in the Late Cretaceous Jorsalfare Formation.The well penetrated a 405 m thick section with Heimdal Formation sands from 2156.5 m to 2561 m. The reservoir characteristics were quite the same as in well 25/4-1: clean sands with occurrence of only small shale-sand laminae and a few carbonaceous stringers. A nine-meter thick oil column was found from top of the reservoir down to an OWC at 2165.5 m, which was estimated to be 8.5 m higher than in 25/4-1. Other reservoirs were water-wet except a very thin bed of calcareous sand between 2591 and 2597 m (Våle Formation) with some residual oil according to the log interpretation, and where a small methane kick occurred.One conventional core was cut in the interval 2159 m to 2172 m. Only 2166.6 m to 2167.4 m was recovered. Good shows with bleeding oil was observed on the recovered piece of core. Three Formation Interval Tester samples were taken. FIT 1 and 3 were taken at 2162.5 m. The FIT 1 fluid was transferred under bottom hole pressure for PVT studies. FIT 3 recovered 4.15 1itre of oil, 5.75 litre of filtrate + mud and 136 litre of gas. FIT 2 at 2165.8 m produced 9.9 1itre of water, filtrate, and mud with some traces of oil.The well was permanently abandoned on 6 December 1973 and has been classified as a minor oil discovery.TestingNo drill stem test was performed in the well. -
Borekaks i Sokkeldirektoratet
Borekaks i Sokkeldirektoratet Borekaks tilgjengelig for prøvetaking?YESBorekaks i Sokkeldirektoratet Borekaksprøve, topp dybde [m]Borekaksprøve, bunn dybde [m]495.002775.00 -
Borekjerner i Sokkeldirektoratet
Borekjerner i Sokkeldirektoratet Kjerneprøve nummerKjerneprøve - topp dybdeKjerneprøve - bunn dybdeKjerneprøve dybde - enhet12171.22172.0[m ]Borekjerner i Sokkeldirektoratet Total kjerneprøve lengde [m]0.8Borekjerner i Sokkeldirektoratet Kjerner tilgjengelig for prøvetaking?YES -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet144426912983101411251200203820382073211721572561272327622762 -
Spleisede logger
Spleisede logger Dokument navnDokument formatDokumentstørrelse [MB]pdf0.30 -
Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter
Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter Dokument navnDokument formatDokumentstørrelse [MB]pdf0.26 -
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk)
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk) Dokument navnDokument formatDokumentstørrelse [MB]pdf1.64pdf1.25 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]CBL1442026DLT BHC GR20262775FDC CNT GR20262775GR1442026HDT20262775IES4682032IES20262775IES GR CNL21262315ML MLL20262775SL BHC4682029VELOCITY1442775 -
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 formasjonstestCONDUCTOR30181.036181.00.00LOTSURF.COND.13 3/8468.017 1/2475.00.00LOTINTERM.9 5/82026.012 1/42080.00.00LOTOPEN HOLE2775.08 1/22775.00.00LOT -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling1811.2670.013.0seawater9431.2670.05.0seawater15121.2445.08.0seawater22831.2648.04.2seawater23161.2752.012.0seawater27751.2652.04.0seawater -
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