25/4-3
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Generell informasjon
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Brønnhistorie
GeneralThe well 25/4-3 is located SW of the Heimdal field on a Paleocene structure which trends NE-SW and stretches southwards over the block 25/7. The Heimdal sand formation was the main objective with a bright spot phenomenon clearly visible on all the seismic sections through the structure. Seismic mapped vertical closure was assumed to be less than 50 m. Danian sands was the secondary target.Operations and resultsWildcat well 25/4-3 was spudded with the semi-submersible installation Deepsea Driller on 13 October 1974 and drilled to TD at 2714 m in the Late Cretaceous Jorsalfare Formation.The tuff marker was encountered at 1974 m, 20 m lower than prognosed. Heimdal sands expected around 2075 m were found at 2125 m. The Heimdal sand contained 3 m gas down to a gas/oil contact at 2128 m and 5 m oil down to a oil/water contact at 2133 m. A 94 m thick sequence of Danian sands (Ty Formation) was encountered at 2550 m overlying Late Cretaceous chalky limestones.Three cores were cut in the Heimdal sands from 2128 m to 2144 m. Three Formation Interval Tests were conducted on the interval 2125 - 2133 m. FIT 1 and 3 at 2126.2 and 2126.4 m were unsuccessful due to mechanical failures. FIT 2 at 2129.7 recovered oil and mud filtrate.The well was permanently abandoned on 22 November 1974 as an oil and gas 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]480.002710.00 -
Borekjerner i Sokkeldirektoratet
Borekjerner i Sokkeldirektoratet Kjerneprøve nummerKjerneprøve - topp dybdeKjerneprøve - bunn dybdeKjerneprøve dybde - enhet12124.02128.5[m ]22133.02135.0[m ]32135.02139.0[m ]Borekjerner i Sokkeldirektoratet Total kjerneprøve lengde [m]10.5Borekjerner 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 formasjonstestCONDUCTOR30184.036184.00.00LOTINTERM.13 3/8451.517 1/2454.00.00LOTINTERM.9 5/81957.012 1/41959.50.00LOTOPEN HOLE2714.08 1/22714.00.00LOT -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]DLL MSFL19602713FDC CNL GR20862158GR SL4511961GR SL19602713HDT19602713IES4511961IES19602713ML MLL19602713SNP GR19602713VELOCITY4512710 -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet147385501740843106512851363196519652016206321252503255026462646 -
Spleisede logger
Spleisede logger Dokument navnDokument formatDokumentstørrelse [MB]pdf0.27 -
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk)
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk) Dokument navnDokument formatDokumentstørrelse [MB]pdf2.57pdf1.28 -
Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter
Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter Dokument navnDokument formatDokumentstørrelse [MB]pdf0.25 -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling6051.1265.07.0seawater9821.1354.05.2seawater17501.2150.03.8seawater25351.2344.03.8seawater