7122/7-5
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Generell informasjon
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Brønnhistorie
The 7122/7-5 well was drilled as an exploration well on the Goliat West Prospect, a downthrown fault compartment compared to the proved hydrocarbon accumulations of Goliat. The purpose of the well was to investigate the hydrocarbon potential of the Early Jurassic/Late Triassic Kap Toscana Group, the Late Triassic Snadd Formation, and the Middle Triassic Kobbe Formation and into the Early Triassic Havert Formation.Operations and resultsWildcat well 7122/7-5 was spudded with the semi-submersible installation Polar Pioneer on 28 November 2006 and drilled to TD at 2228 m. No significant technical problems were encountered during the operations. The well was drilled with sea water and hi-vis sweeps down to 1060 m. Formate mud previously used for drilling the 7122/7-1, -2, -3 and -4S was used from 1050 m to TD. The re-used formate mud was mixed with fresh formate mud in the proportion ca 1:2.The top of the Kap Toscana reservoir was found at 1181 m as prognosed. The top Snadd Formation reservoir was encountered at 1281 m, 12 m deeper than the prognosis. The third reservoir, in the Kobbe Formation was found at 1868 m, 4m deeper than the prognosis. A fourth reservoir in the Klappmyss Formation was encountered at 2126 m, 43m deeper than prognosis. The reservoirs were not hydrocarbon bearing. Oil shows were recorded on cuttings and core chips from 1868 to 1910 m in the upper part of the Kobbe Formation; otherwise no shows were reported from the well.One core was cut from 1900 to 1910.7 m in the Kobbe Formation. No wire line fluid samples were taken.The well was plugged back to 995 m and abandoned on 23 December as a dry well. It was decided to drill a sidetrack (7122/7-5 A) in order to explore the potential of the Kobbe Formation on the east up thrown side of the fault.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]1065.002228.00 -
Borekjerner i Sokkeldirektoratet
Borekjerner i Sokkeldirektoratet Kjerneprøve nummerKjerneprøve - topp dybdeKjerneprøve - bunn dybdeKjerneprøve dybde - enhet11900.01910.8[m ]Borekjerner i Sokkeldirektoratet Total kjerneprøve lengde [m]10.8Borekjerner i Sokkeldirektoratet Kjerner tilgjengelig for prøvetaking?YES -
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 formasjonstestCONDUCTOR30441.036445.00.00LOTSURF.COND.13 3/81015.017 1/21060.01.65LOTOPEN HOLE2228.012 1/42228.00.00LOT -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]MDT GR MSIP ACTS10152224MRLA TLD CNL GR ACTS10152224MWD - GR RES DIR PRESSURE394445MWD - GR RES DIR PRESSURE4452222MWD - GR RES SON DIR PRESSURE4451060 -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet39464364365565596199810831168118111811281186818682126 -
Spleisede logger
Spleisede logger Dokument navnDokument formatDokument størrelse [KB]pdf0.32 -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling4451.03SEAWATER8931.03SEAWATER10601.03SEAWATER10601.178.0NACL10601.178.0NACL10701.2513.0NACL14751.2512.0FORMPRO19001.3012.0FORMPRO21111.3013.0FORMPRO22281.3213.0FORMPRO -
Palynologiske preparater i Sokkeldirektoratet
Palynologiske preparater i Sokkeldirektoratet Prøve dybdeDybde enhetPrøve typeLaboratorie1900.6[m]CICHRON1906.4[m]CICHRON1909.8[m]CICHRON -
Tynnslip i Sokkeldirektoratet
Tynnslip i Sokkeldirektoratet DybdeEnhet1900.45[m ]1902.26[m ]1906.90[m ]1908.75[m ]1909.35[m ]