25/11-10
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Generell informasjon
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Brønnhistorie
GeneralWell 25/11-10 was drilled to appraise the Balder Field on the Utsira High in the North Sea. The objective was to establish the presence of a thick accumulation of oil sand in the southern part of the Balder Field, and evaluate the geologic concept of sand-shale distribution and the reservoir quality of the Paleocene sands.Operations and resultsAppraisal well 25/11-10 was spudded with the semi-submersible installation Glomar Biscay II on 20 January 1981 on and drilled to TD at 1988 m (1985 m logger's depth) in the Danian age chalk of the Ekofisk Formation. The well was drilled with seawater/gel/Lignosulphonate mud.The Paleocene Heimdal Formation reservoir sands anticipated to be present in this well were found at 1786 m, significantly deeper than prognosed and below the field oil-water contact. Gross thickness of the sands was 128.2 m with an average porosity of 31.4%. They were water wet. The sands were found similar to those found in 25/11-7 to the north. Only thin stringers (2.5 m totally) with shows between 1757 m and 1785 m were found in the Sele and Lista formations.No cores were cut and no wire line fluid samples were taken.The well was permanently abandoned on 17 February 1981 as a dry well with 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]220.001980.00 -
Palynologiske preparater i Sokkeldirektoratet
Palynologiske preparater i Sokkeldirektoratet Prøve dybdeDybde enhetPrøve typeLaboratorie1654.0[m]SWC1657.0[m]SWC1660.5[m]SWC1669.0[m]SWC1674.0[m]SWC1679.0[m]SWC1684.0[m]SWC1689.0[m]SWC1694.0[m]SWC1702.0[m]SWC1706.5[m]SWC1712.0[m]SWC1715.0[m]SWC1720.0[m]SWC1724.0[m]SWC1728.0[m]SWC1735.5[m]SWC1740.0[m]SWC1745.0[m]SWC1750.5[m]SWC1757.0[m]SWC1760.0[m]SWC1766.0[m]SWC1772.0[m]SWC1773.0[m]SWC1773.5[m]SWC1775.0[m]SWC1779.0[m]SWC1785.0[m]SWC1820.0[m]DC1840.0[m]DC1860.0[m]DC1880.0[m]DC1900.0[m]DC1916.0[m]SWC1924.5[m]SWC1931.5[m]SWC1934.5[m]SWC1942.5[m]SWC1953.0[m]SWC1960.0[m]SWC1980.0[m]DC -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet14960175477877810041025106211591223126012701682168217251743178619301943195819681968 -
Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter
Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter Dokument navnDokument formatDokumentstørrelse [MB]pdf0.09pdf0.15 -
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk)
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk) Dokument navnDokument formatDokumentstørrelse [MB]pdf1.29pdf9.03 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]DEN NEU GR12101984DIPLOG12151985IEL BHC AC GR SP1391983SWC12981970VELOCITY LOG1391975 -
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 formasjonstestCONDUCTOR30211.036212.00.00LOTINTERM.13 3/8470.017 1/2485.01.63LOTINTERM.9 5/81210.012 1/41225.01.77LOTOPEN HOLE1988.08 1/21988.00.00LOT -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling3101.0629.0waterbased6401.0933.0waterbased12101.1544.0waterbased14001.1647.0waterbased18701.1952.0waterbased