6608/11-3
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Generell informasjon
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Brønnhistorie
GeneralWell 6608/11-3 is located on the Dønna Terrace in the central part of block 6608/11. The main objective was to prove hydrocarbons in the Lower Jurassic sandstones of the Åre Formation; the secondary objectives were to prove hydrocarbons in the Upper Jurassic sandstones of the Melke Formation and to gain geological data from the Triassic Grey Beds Formation.Operations and resultsWell 6608/11-3 was spudded with the semi-submersible installation Stena Don on 26 November 2002 and drilled to TD at 2031 m in the Triassic Grey Beds. No significant problems were encountered during drilling. The well was drilled with seawater and h-vis sweeps down to 725 m and with KCl/PAC/glycol mud (GLYDRIL) from 725 m to TD. A class 2 shallow gas warning was issued prior to drilling the well, and the well was thus designed accordingly with the BOP set above the potential gas sands. No indications of shallow gas were seen on the MWD logs or in the gas/cuttings in this section. High pump rates resulted in non-representative cuttings samples due to heavy clay washout of the formation. This was particularly true for the Melke and Grey Beds Formations.Reservoir zones were penetrated in the Melke, Tilje and Åre Formations, all of which proved to be water bearing. Good quality reservoir sands were also penetrated in the Triassic Grey Beds Formation. These were also water bearing. No shows were recorded in the well. Geochemical analyses of picked cuttings and SWCs indicated fair source potential in the Tare and Melke Formations, and good source potential in the Åre and Grey Beds Formations. The Late Jurassic Spekk Formation was not present in the well. Thermal maturity of the source rocks was evaluated using vitrinite reflectance and Tmax data. The entire section was found thermally immature. Only one sample from the Tare Formation (1420 m) had traces of hydrocarbons, mainly light hydrocarbons in the C14-C20 range.One core (6.12 m recovered) was taken in the interval 1985 m to 1995 m in the Triassic Grey Beds Formation. Wire line logs showed a possible thin gas bearing sand (1416.5 m to 1419 m) in the Paleocene Tare Formation. A rush mobilization of MDT sampling equipment was done, with conventional sampling chambers. The sampling string included a 1-gallon and a 2 3/4-gallon chamber but the available equipment did probably not provide representative samples. Both chambers contained mud filtrate, water, and small amounts of dry gas. A total of 25 MDT pressure tests were acquired in the Tare, Melke, Åre, and Grey Beds Formations. The tests showed that the Tare Formation was weakly overpressured and not in communication with the underlying Jurassic sandstones.The well was permanently abandoned as dry on 15 December 2002.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]740.002031.00 -
Borekjerner i Sokkeldirektoratet
Borekjerner i Sokkeldirektoratet Kjerneprøve nummerKjerneprøve - topp dybdeKjerneprøve - bunn dybdeKjerneprøve dybde - enhet11985.01991.1[m ]Borekjerner i Sokkeldirektoratet Total kjerneprøve lengde [m]6.1Borekjerner i Sokkeldirektoratet Kjerner tilgjengelig for prøvetaking?YES -
Kjernebilder
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Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet398398124012971297136313631429144414441477147715091517151715301940 -
Geokjemisk informasjon
Geokjemisk informasjon Dokument navnDokument formatDokumentstørrelse [MB]pdf2.18 -
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk)
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk) Dokument navnDokument formatDokumentstørrelse [MB].PDF1.79.pdf3.60 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]CST GR13091955MDT13991419MDT PRETESTS14161985MWD LWD - MPR LITE458730MWD LWD - MPR PWD7301985PEX DSI FMI GR7252031VSP GR4002010 -
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 formasjonstestCONDUCTOR30457.036460.00.00LOTSURF.COND.13 3/8725.017 1/2730.01.34LOTOPEN HOLE2031.012 1/42031.00.00LOT -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling4041.07SW / BENTONITE 14601.15SW / BENTONITE 114001.2013.0GLYDRIL 1814171.2214.0GLYDRIL 1814181.2214.0GLYDRIL 18 -
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