25/4-7
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Generell informasjon
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Brønnhistorie
GeneralThe Kneler well 25/4-7 was designed as an exploratory test of an irregular 4-way closure midway between the Kameleon structure (discovered by well 24/6-2 in 1998), and the Gekko structure (discovered by well 25/4-3 in 1974), which found a thin hydrocarbon column. The primary reservoir target was the Paleocene Heimdal formation. Well 25/4-7 was designed to provide local structural control to reduce uncertainty in field size and also provide stratigraphic control, particularly the position and character of a shale horizon at the base of the Upper Heimdal reservoir.Operations and resultsExploration well 25/4-7 was spudded with the semi-submersible installation Deepsea Bergen on 21 March 2003 and drilled to TD at 2286 m in the Paleocene Heimdal Formation. The well was drilled without significant problems. A number of attempts to get wire line tools to TD failed due to hole obstructions. Hole opening of the 12 1/4" section to 8 1/2" was performed in several steps. Between hole opening operations logging was attempted with variable success. Logs were finally acquired down to 2242 m. The well was drilled with seawater down to 1317 m and with Carbosea oil based mud from 1317 m to TD.The Heimdal Formation was encountered at 2084.5 m and from logs, MDT sampling, and shows on cores and cuttings it was oil bearing down to the OWC at 2132.5 m. The Heimdal Formation at this location consists of an upper, heterolithicdominated sequence down to 2105.5 m and more massive sandstone below that depth.A total of 53 m of core (97.7 % recovery) was cut in two cores in the interval from 2104 m to 2157 m in the Heimdal formation. MDT fluid samples were taken at 2086.4 m (oil), 2110.0 m (oil), and at 2144.7 m (water).The well was suspended as an oil discovery on 17 April 2003TestingNo drill stem test was performed. -
Borekaks i Sokkeldirektoratet
Borekaks i Sokkeldirektoratet Borekaks tilgjengelig for prøvetaking?YESBorekaks i Sokkeldirektoratet Borekaksprøve, topp dybde [m]Borekaksprøve, bunn dybde [m]1320.002286.00 -
Borekjerner i Sokkeldirektoratet
Borekjerner i Sokkeldirektoratet Kjerneprøve nummerKjerneprøve - topp dybdeKjerneprøve - bunn dybdeKjerneprøve dybde - enhet12104.02129.8[m ]22130.02156.2[m ]Borekjerner i Sokkeldirektoratet Total kjerneprøve lengde [m]52.0Borekjerner i Sokkeldirektoratet Kjerner tilgjengelig for prøvetaking?YES -
Oljeprøver i Sokkeldirektoratet
Oljeprøver i Sokkeldirektoratet Test typeFlaske nummerTopp dyp
MD [m]Bunn dyp
MD [m]Væske typeTest tidspunktPrøver tilgjengeligMDT2110.000.00OIL14.04.2003 - 04:35YES -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet1423687271216132018951895200520392085 -
Spleisede logger
Spleisede logger Dokument navnDokument formatDokumentstørrelse [MB]pdf0.20 -
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk)
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk) Dokument navnDokument formatDokumentstørrelse [MB].pdf24.81.pdf0.62 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]MDT GR20852157PEX DSI AIT2022025PEX DSI AIT13061373PEX DSI AIT19702235VSI GR7502191 -
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 formasjonstestCONDUCTOR30202.036204.00.00LOTSURF.COND.13 3/81308.017 1/21317.01.50LOTOPEN HOLE2286.08 1/22286.00.00LOT -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling12001.0116.0SEAWATER13171.2025.0SPUD MUD13341.2018.0OIL (REGULAR)19801.3322.0OIL (REGULAR)22121.2518.0OIL (REGULAR)22861.2519.0OIL (REGULAR) -
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