6407/8-4 A
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Generell informasjon
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Brønnhistorie
GeneralWell 6407/8-4 A is a sidetrack from the Galtvort well 6407/8-4 S, located on the eastern margin of the Gimsan Basin in the Norwegian Sea, ca 7 km northwest of the Draugen Field. A main fault separates the middle and northern segments of the Galtvort structure from the southern segment. The southern segment was tested in well 6407/8-4 S and found gas in the Fangst Group. The primary objective of the sidetrack was to test the hydrocarbon potential of prospective formations in the middle and northern segments in order to test the sealing potential of the main fault crossing the structure.Operations and resultsWildcat well 6407/8-4 A was drilled with the semi-submersible installation West Alpha as a sidetrack. It was kicked off from a milled window (1497 - 1502 m) in the 13 3/8" casing in 6407/8-4 S on 22 May 2008 and drilled to TD at 2473 m (2319 m TVD) in the Early Jurassic Åre Formation. The well was drilled with Glydril mud from kick-off to TD. No significant technical problems were encountered in the operations.Prior to drilling it was prognosed that the sidetrack should penetrate the same formations as well 6407/8-4 S. Due to a much larger fault throw between the Middle and the South Galtvort Segments and hence more extensive uplift and erosion of the Middle and North Segments than anticipated, the entire Fangst Group was eroded. As a result the well penetrated directly from the Cretaceous Kvitnos Formation and into the Båt Group at 2117.8 m (2026.7 m TVD). The upper part of the Båt Group consisted of Ror Formation mudstones and only thin Tofte equivalent sandstones of mediocre reservoir quality. The underlying Tilje Formation came in at 2217 m (2106 m TVD) and was gas bearing down to a GWC somewhere in the interval 2175 to 2183 m TVD SS. Weak oil shows were observed in cuttings between 2226 m to 2274 m in the Tilje Formation. Otherwise no oil shows were observed in the sidetrack wellbore.No cores were cut in this wellbore. MDT wire line gas samples were taken at 2219 m, 2120.4 m, and at 2121 m. Sampling was performed with only a few bar drawdown and the samples are believed to be representative of the formation fluids.The well was permanently abandoned on 16 June 2008 as a gas discovery.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]1510.002463.00 -
Palynologiske preparater i Sokkeldirektoratet
Palynologiske preparater i Sokkeldirektoratet Prøve dybdeDybde enhetPrøve typeLaboratorie2830.0[m]DCSHYDRO2835.0[m]DCSHYDRO -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet284284997102510251658165817311910191020812118211822172424 -
Geokjemisk informasjon
Geokjemisk informasjon Dokument navnDokument formatDokumentstørrelse [MB]txt0.00txt0.09 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]CMR MDT GR21102224FMI HNGS20622473MSIP HRLA PEX ECS15002476MWD - GR RES DIR PWD14972473 -
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 formasjonstestINTERM.9 5/82062.012 1/42062.01.85LOTOPEN HOLE2473.08 1/22473.00.00LOT -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling15071.4620.0Glydril15461.5023.0Glydril18201.5021.0Glydril20621.5019.0Glydril21001.3117.0Glydril21801.3115.0Glydril22221.3115.0Glydril22651.3017.0Glydril23721.3020.0Glydril24731.3012.0Glydril24731.2011.0Glydril -
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]pdf0.30