2/8-2
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Generell informasjon
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Brønnhistorie
GeneralExploration well 2/8-2 is located about 8 km south of the 2/5-3 Sørøst Tor Discovery. Danian and Maastrichtian limestones were the main objectives. Another objective was to investigate if the Paleocene hydrocarbon bearing sandstones, which had been encountered in the Cod Field, extend across the 2/8-2 location.Operations and resultsWell 2/8-2 was spudded with the jack-up installation Orion on 28 June 1970 and drilled to TD at 3245 m in the Late Cretaceous Rødby Formation. While drilling at approximately 1774 m large chunks of clay came over the shale shaker, followed by a gas kick at 1777 m. The mud weight was reduced to 10.0 ppg and degasser was run for two hours. Then the weight was increased to 14.1 ppg, the hole circulated and drilling continued. Sloughing of shale occurred around 2490 m, and the mud weight was increased to 14.3 ppg to control this problem. TD was reached and the well successfully logged. Seawater was used for drilling the 36" hole down to 129 m. A seawater/ gel mud was used to drill out the 36" casing and down to 427 m. From 427 m to TD the well was drilled with an Emulsite/Drill aid system with 2 to 5 % diesel oil added.Only traces of sandstone and siltstone were encountered in the Paleocene section, and the rocks showed no indications of hydrocarbons. Neither the Danian sequence, which was thinner than expected, nor the Maastrichtian limestones contained hydrocarbons. The only significant hydrocarbon shows encountered in 2/8-2 were from thin dolomite and limestone stringers of Eocene age. These exhibited good oil stains but generally showed poor porosities, and further evaluations were not made. Two cores were cut in the well. Core l from 2962 m to 2971 m recovered 9 m of Danian chalk and core 2 from 3231 m to 3238 m recovered 6.4 m of Rødby Formation shale. No fluid sample was collected from the well.The well was permanently abandoned on 30 July as a well with showsTestingNo 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]134.113245.21 -
Borekjerner i Sokkeldirektoratet
Borekjerner i Sokkeldirektoratet Kjerneprøve nummerKjerneprøve - topp dybdeKjerneprøve - bunn dybdeKjerneprøve dybde - enhet12961.72970.9[m ]23231.23237.6[m ]Borekjerner i Sokkeldirektoratet Total kjerneprøve lengde [m]15.6Borekjerner i Sokkeldirektoratet Kjerner tilgjengelig for prøvetaking?YES -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet9515402823282328442893293229502950304432273227 -
Spleisede logger
Spleisede logger Dokument navnDokument formatDokumentstørrelse [MB]pdf0.39 -
Geokjemisk informasjon
Geokjemisk informasjon Dokument navnDokument formatDokumentstørrelse [MB]pdf1.78pdf0.49pdf0.16 -
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Dokumenter – Sokkeldirektoratets publikasjoner
Dokumenter – Sokkeldirektoratets publikasjoner Dokument navnDokument formatDokumentstørrelse [MB]pdf11.51pdf55.22 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]CAL4181549CDM15373246DLL15393243FDC15373246GR122418IES4183248MLL-C29273246SGR4181539SGR-C15393243SNP15373246SRS4183246 -
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 formasjonstestCONDUCTOR30129.036136.00.00LOTINTERM.20418.026427.00.00LOTINTERM.13 3/81538.017 1/21549.00.00LOTOPEN HOLE3246.012 1/43246.00.00LOT -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling1321.18seawater14001.25seawater15451.60seawater17261.61seawater23281.67seawater28661.71seawater31691.72seawater