2/9-2
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Generell informasjon
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Brønnhistorie
GeneralWell 2/9-2is located on the Piggvar Terrace in the southern North Sea. The primary objective was to test a broad structural closure where Jurassic Sands were postulated to be present along the narrow intermediate zone between the Mandal High to the east and the Central Graben to the west.Operations and resultsWildcat well 2/9-2 was spudded with the semi-submersible installation Dyvi Alpha on 7 July 1979 and drilled to TD at 4367 m in the Early Permian Rotliegend Group. The well was drilled without significant problems. However, four days were spent on retrieving the wear bushing prior to running the 13 3/8-inch casing. The well was drilled to 1513 meters using seawater, spotting high viscous gel pills occasionally while drilling and upon completion of each hole interval. A weighted Gypsum-polymer mud was used below this depth to TD.The Late Jurassic was encountered at 3653 m, 16 m low to prognosis, confirming the structural interpretation. The Late Jurassic section (3653-4293 m) consisted of 640 meters of predominantly black shale with no sands and was age-dated Middle Kimmeridgian-Portlandian. No Jurassic rocks older than Middle Kimmeridgian were found. From 4290-4325 m, the section was silty and sandy but impermeable. From 4325 m to TD lithology was interpreted to be weathered volcanics of possibly Permian age, with caved Kimmeridgian shales. Stratigraphic and petrophysical data pertinent to further evaluation of the Jurassic zone was secured through the acquisition of one conventional core and an almost complete set of open hole logs. Poor to very poor shows were seen in the intervals 4135 - 4155 m and 4160 - 4182.5 m in the Late Jurassic. They were described as 0-15% dull yellow fluorescence, slow streaming, low intensity, blue-white cut.One conventional core was cut in the Late Jurassic from 3897 - 3916 m with 100% recovery. Sidewall coring was abandoned as the tool became stuck in the hole at 3460 m. No wire line pressure points or fluid samples were taken.The well was permanently abandoned on 4 September 1979 as a dry well.TestingNo drill stem test was performed. -
Borekjerner i Sokkeldirektoratet
Borekjerner i Sokkeldirektoratet Kjerneprøve nummerKjerneprøve - topp dybdeKjerneprøve - bunn dybdeKjerneprøve dybde - enhet13897.03915.0[m ]Borekjerner i Sokkeldirektoratet Total kjerneprøve lengde [m]18.0Borekjerner i Sokkeldirektoratet Kjerner tilgjengelig for prøvetaking?YES -
Palynologiske preparater i Sokkeldirektoratet
Palynologiske preparater i Sokkeldirektoratet Prøve dybdeDybde enhetPrøve typeLaboratorie3897.1[m]CHRS3905.6[m]CHRS3912.8[m]CHRS -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet9315602927292729452982302930393039312634123471347135243653365337554032429242924316 -
Geokjemisk informasjon
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Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter
Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter Dokument navnDokument formatDokumentstørrelse [MB]pdf0.11pdf0.26 -
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk)
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk) Dokument navnDokument formatDokumentstørrelse [MB]pdf2.23pdf7.94 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]BHC AL IEL GR SP153363BHC AL IEL GR SP3581714BHC AL IEL GR SP17013510BHC AL IEL GR SP34994670CBL VDL931675CBL VDL12903500CDL CDN GR C34994367DIPLOG17013510DIPLOG34994367DLL MLL GR SP34994367VELOCITY34994367 -
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 formasjonstestCONDUCTOR30153.036155.00.00LOTSURF.COND.20357.026365.01.38LOTINTERM.13 3/81701.017 1/21718.01.70LOTINTERM.9 5/83499.012 1/43510.02.09LOTOPEN HOLE4367.08 3/84367.00.00LOT -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling3651.0480.0waterbased14401.0327.0waterbased17191.5638.0waterbased20501.6249.0waterbased35421.5942.0waterbased39231.5852.0waterbased -
Tynnslip i Sokkeldirektoratet
Tynnslip i Sokkeldirektoratet DybdeEnhet3904.00[m ]3907.00[m ]