7228/7-1 A
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Generell informasjon
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Brønnhistorie
GeneralWellbore 7228/7-1 A is situated in the Nordkapp basin. The Nordkapp basin is the most pronounced structural element east of Loppa High, with a basinal-axis oriented NE-SW. From top Cretaceous and down to TD of the well the sediments are steeply dipping due to salt diapirism, with the salt diapir located SE of the surface location. Well 7228/7-1S unexpectedly drilled into a Permian block where the target reservoir was prognosed and so did not reach the main target for the planned well. Based on this result it was decided to drill sidetrack 7228/7-1 A. The main objectives of well 7228/7-1 A was to test the hydrocarbon potential of Upper and Middle Triassic sandstones of the Snadd Formation.Operations and resultsWell 7228/7-1 A was kicked off from well 7228/7-1 S T3 below the 13 3/8" casing shoe at 1341 m on 8 January 2001 and drilled with the semi-submersible installation "Transocean Arctic" to a total depth of 2881 m the in Early Triassic (Spathian) Klappmys Formation. The well was drilled with "Glydril" mud (KCl / Polymer / glycol) from kick-off to TD. As in 7228/7-1 S several good reservoir zones were penetrated in the Jurassic section, the Stø Formation, the Nordmela Formation and the Tubåen Formation. The Jurassic reservoirs were water wet as proved in 7228/7-1 S T3. Good reservoir zones were also penetrated in Snadd and Klappmys Formations in the Triassic section. The Lower Carnian sandstones in the Snadd Formation proved to be gas and oil bearing, whilst the Klappmys Formation was gas bearing. This was verified both by shows on cores, logs, samples and laboratory studies of the cores. Both hydrocarbon bearing reservoir zones were cored. Two of these were cut in the Snadd Formation, one in the Kobbe Formation, and one in the Klappmys Formation. Wire line MDT gas samples were taken at 2051.1 m and 2057.5 m, while a MDT oil sample was taken at 2091.1 m. The samples were considered of good quality. Well 7228/7-1 A proved an oil-down-to situation in the Lower Carnian sandstone at 2100 m (2078 m TVD RKB, 2054 m TVD MSL). The gas to oil contact was estimated at approximately 2086 m (2064 m TVD RKB, 2040 m TVD MSL). It was decided to drill a sidetrack in order to verify the oil-water contact. Well 7228/7-1 A was permanently abandoned as an oil and gas discovery on 2 February 2001.TestingNo 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]1344.002880.00 -
Borekjerner i Sokkeldirektoratet
Borekjerner i Sokkeldirektoratet Kjerneprøve nummerKjerneprøve - topp dybdeKjerneprøve - bunn dybdeKjerneprøve dybde - enhet12059.02074.7[m ]22075.12102.8[m ]32455.02457.3[m ]42833.02860.9[m ]Borekjerner i Sokkeldirektoratet Total kjerneprøve lengde [m]73.6Borekjerner i Sokkeldirektoratet Kjerner tilgjengelig for prøvetaking?YES -
Kjernebilder
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Palynologiske preparater i Sokkeldirektoratet
Palynologiske preparater i Sokkeldirektoratet Prøve dybdeDybde enhetPrøve typeLaboratorie2106.6[m]CICHRON -
Oljeprøver i Sokkeldirektoratet
Oljeprøver i Sokkeldirektoratet Test typeFlaske nummerTopp dyp
MD [m]Bunn dyp
MD [m]Væske typeTest tidspunktPrøver tilgjengeligMDT2091.100.00CONDENSATE23.07.2001 - 00:00YESMDT0.000.00CONDENSATE23.07.2001 - 00:00YES -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet311334334130013141347136113611379139914941642225522552741 -
Spleisede logger
Spleisede logger Dokument navnDokument formatDokumentstørrelse [MB]pdf0.45 -
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].pdf1.83.pdf6.95 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]CMR ECS HNGS ACTS20232115DSI FMI GR13232881HRLA PEX HNGS ACTS13232881MDT ACTS GR13982493MDT GR20872091MWD MPR13412059VSP GR8711322VSP GR12452873 -
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 formasjonstestCONDUCTOR30372.036373.00.00LOTINTERM.20502.026503.01.62LOTINTERM.13 3/81323.017 1/21325.01.73LOTOPEN HOLE2881.012 1/42881.00.00LOT -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling15401.3519.0GLYDRILL17641.3518.0GLYDRILL20041.3421.0GLYDRILL20451.3519.0GLYDRILL20981.3520.0GLYDRILL21021.3520.0GLYDRILL22241.3519.0GLYDRILL28331.4327.0GLYDRILL28561.4326.0GLYDRILL28611.4327.0GLYDRILL28811.4528.0GLYDRILL -
Tynnslip i Sokkeldirektoratet
Tynnslip i Sokkeldirektoratet DybdeEnhet2100.75[m ]2841.30[m ]2843.80[m ]2853.45[m ] -
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]pdf0.28