2/8-5
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Generell informasjon
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Brønnhistorie
GeneralWell 2/8-5 is located within closure of the large NNW-SSE trending Valhall structure, close to well 2/8-2 and ca 8 km south of the 2/5-3 Sørøst Tor Discovery. The primary target was Danian/Maastrichtian chalk/limestones.Operations and resultsExploration well 2/8-5 was spudded with the jack-up installation Zapata Explorer on 11 April 1974 and drilled to TD at 3304 m in the Early Cretaceous Rødby Formation. Some problems with lost circulation were experienced at 1618 m. At 1909 m in the Hordaland Group a gas kick was taken. Otherwise drilling went without significant problems.No sand was encountered in Paleocene. The well penetrated 88 m of Danian chalk (Ekofisk Formation) and 380 m Late Cretaceous chalk (Tor Formation) before marls of the Rødby Formation were encountered at 3264 m. Well logs indicated that all target formations were water wet. Shows were reported as follows:Miocene (1600 m to1722 m): white bright yellow amber fluorescence giving a fast yellow white slow cut. Associated with a gas peak on the chromatograph analysis at the top. Patchy fluorescence was recorded down section. Oligocene (1829 m): bleeding gas from limestone. (2353 m): pale yellow fluorescence, slow cut, with acid only. Eocene (2464 m to 2718 m): patchy shows, heavy brown oil stain, very dull amber to fast yellow fluorescence, occasional fast bright yellow cut, dark brown cut colour. The Shetland Group (2796 m to 3264 m): background gas only, maximum of 1.8% C1, trace C2-C4 at 3254 m. Fair oil stain, fair to good fluorescence and cut.No conventional core was cut and no fluid sample taken. The well was permanently abandoned on 23 May 1974 as a well with oil shows.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]145.393303.73 -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet10213102718271827282746277927962796288432643264 -
Spleisede logger
Spleisede logger Dokument navnDokument formatDokumentstørrelse [MB]pdf0.37 -
Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter
Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter Dokument navnDokument formatDokumentstørrelse [MB]pdf0.25 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]BHC3661219BHC CNL12192706BHC-C26973097BHC-C30783302CBL10672672CBL12192698CBL12193301CDM26943271CDM FP27103267CNL GR3661219DL26943095FDC CNL26943098FDC CNL30783267IES12172709IES26943098IES30783267PML26943098SRS3663305 -
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 formasjonstestCONDUCTOR30152.036152.00.00LOTSURF.COND.20361.026377.00.00LOTINTERM.13 3/81219.017 1/21234.00.00LOTINTERM.9 5/82698.012 1/42710.00.00LOTOPEN HOLE3304.08 1/23304.00.00LOT -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling3761.12seawater7621.14seawater11231.23seawater12341.48seawater15921.55seawater18401.72seawater21671.75seawater27091.84seawater