6305/1-1
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Generell informasjon
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Brønnhistorie
GeneralWell 6305/1-1 is located in the northern part of the Ormen Lange Dome and was the third well drilled on the Ormen Lange Structure, following the two successful wells 6305/5-1 drilled by Hydro in 1997 and 6305/7-1 drilled by BP in 1998. The Egga sand in the Tang Formation was the main target for the well. The sand was predicted to contain gas. The Tare and Lysing Formations were considered as secondary and third target levels, respectively.Operations and resultsWildcat well 6305/1-1 was spudded in a water depth of 863 m on 18 August 1998 with the semi-submersible installation "Transocean Leader" and drilled to a total depth of 4565 m (4551 m TVD) in Late Cretaceous sediments of the Lysing Formation. Well 6305/1-1 was drilled to 2560 m where hole problems made it necessary to plug the well back and perform a technical, sidetrack from 2467 m. The well was drilled with spud mud down to 1610 m and with "Aquacol" KCl/Polymer mud from 1610 to TD. The Egga Member of the Tang Formation and thin sandstones in the Springar Formation were proven in cores from 2558-2623,5 m. Egga sand was encountered even though the reservoir quality was poorer than prognosed. No moveable hydrocarbons were encountered in well 6305/1-1, but weak residual shows were reported in almost the entire Cretaceous section. The Egga sand in well 6305/1-1 proved to be over pressured compared to wells 6305/5-1 and 6305/7-1. Even though some sand was reported from the mud geologist at the predicted intra Tare level this was not considered as a reservoir sand. At Lysing level some thin sandstone layers were encountered, but not considered as a reservoir. Five cores were cut in the well. Four were cut in the Tang and Springar Formations in the interval 2556 m to 2628 m. Recovery for these varied from 10 % to 95 %. The fifth core was cut in the upper part of the Lysing Formation in the interval 3646 m to 3670.5 m. Recovery for this core was 97 %. An MDT fluid sample was taken at 2567.7 m. It contained formation water. The well was permanently plugged and abandoned as a dry well on 19 November 1998.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]1620.004555.00 -
Borekjerner i Sokkeldirektoratet
Borekjerner i Sokkeldirektoratet Kjerneprøve nummerKjerneprøve - topp dybdeKjerneprøve - bunn dybdeKjerneprøve dybde - enhet12556.02573.2[m ]22574.02582.2[m ]32601.02601.9[m ]42610.02623.2[m ]53643.03669.6[m ]Borekjerner i Sokkeldirektoratet Total kjerneprøve lengde [m]66.0Borekjerner i Sokkeldirektoratet Kjerner tilgjengelig for prøvetaking?YES -
Kjernebilder
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Palynologiske preparater i Sokkeldirektoratet
Palynologiske preparater i Sokkeldirektoratet Prøve dybdeDybde enhetPrøve typeLaboratorie1630.0[m]DCRRI1649.0[m]SWCRRI1660.0[m]DCRRI1667.5[m]SWCRRI1690.0[m]DCRRI1715.0[m]SWCRRI1720.0[m]DCRRI1730.0[m]DCRRI1739.0[m]SWCRRI1753.0[m]SWCRRI1778.0[m]SWCRRI1793.0[m]SWCRRI1813.0[m]SWCRRI1850.0[m]DCRRI1879.0[m]SWCRRI1880.0[m]DCRRI1912.0[m]SWCRRI1935.0[m]SWCRRI1948.0[m]SWCRRI1956.0[m]SWCRRI1965.0[m]SWCRRI1977.0[m]SWCRRI1990.0[m]DCRRI2008.0[m]SWCRRI2015.0[m]SWCRRI2024.0[m]SWCRRI2053.0[m]SWCRRI2060.0[m]SWCRRI2071.5[m]SWCRRI2078.0[m]SWCRRI2087.0[m]SWCRRI2103.0[m]SWCRRI2112.0[m]SWCRRI2117.0[m]SWCRRI2142.0[m]SWCRRI2149.0[m]SWCRRI2165.0[m]SWCRRI2198.0[m]SWCRRI2208.0[m]SWCRRI2225.0[m]SWCRRI2235.0[m]SWCRRI2470.0[m]DCRRI2500.0[m]DCRRI2525.0[m]DCRRI2535.0[m]DCRRI2540.0[m]DCRRI2542.0[m]DCRRI2545.0[m]DCRRI2547.0[m]DCRRI2552.0[m]DCRRI2650.0[m]DCRRI2675.0[m]DCRRI2690.0[m]DCRRI2705.0[m]DCRRI2715.0[m]DCRRI2725.0[m]DCRRI2730.0[m]DCRRI2770.0[m]DCRRI2820.0[m]DCRRI -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet8638631734174017402172217223552558260626062827304836403640 -
Spleisede logger
Spleisede logger Dokument navnDokument formatDokumentstørrelse [MB]pdf0.57 -
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk)
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk) Dokument navnDokument formatDokumentstørrelse [MB].pdf182.80.pdf6.65 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]CMR GR25402645CST GR24324550CST GR AMS16282235DSI FMI CAL19002544FMI HNGS AMS24143011HALS TLD HGNS DSI GPIT AMS8392235HALS TLD HGNS DSI GPIT AMS23504550MDT GR25572864MWD-MPRLITE/DPR8634560VSP18404560 -
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 formasjonstestCONDUCTOR30942.036942.00.00LOTINTERM.201605.0261605.01.47LOTINTERM.13 3/82414.017 1/22414.01.63LOTINTERM.9 5/83004.012 1/43004.01.68LOTOPEN HOLE4560.08 1/24560.00.00LOT -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling8891.10WATER BASED9451.10WATER BASED9461.20WATER BASED16001.3818.0WATER BASED16101.20WATER BASED16151.3216.0WATER BASED24150.0015.0WATER BASED24181.3017.0WATER BASED25561.4524.0WATER BASED25611.4217.0WATER BASED26851.4520.0WATER BASED29001.4621.0WATER BASED29501.4824.0WATER BASED30101.5025.0WATER BASED33721.4719.0WATER BASED43131.4722.0WATER BASED44381.4718.0WATER BASED45601.4721.0WATER 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]PDF0.27