2/7-19
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Generell informasjon
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Brønnhistorie
>GeneralWell 2/7-19 is located ca 10 km west of the Embla and Eldfisk fields in the southern Norwegian North Sea. The objective was to test the Danian - Late cretaceous limestone, and sandstones of the Early Cretaceous and Jurassic on a low relief structure. Well 2/7-19 was the third attempt to drill this prospect. The first two attempts, 2/7-17 and 2/7-18, were junked because of mechanical problems.Operations and resultsWell 2/7-19 was spudded with the semi-submersible installation Borgny Dolphin on 2 September 1980 and drilled to TD at 4877 m in the Late Permian Zechstein Group. A total of 154 days on the location were used to drill and abandon the well. The well was drilled to a depth of 4785 m with 16.0 ppg mud. This was on 17 November. An estimated 12 m of Early Cretaceous sandstone had been penetrated and the drilling gas had increased after entering this zone, with some indications of hydrocarbons. The well was static with 16.0 ppg density mud, however the weight was raised to come out of the hole and commence coring. Upon raising the mud weight to 16.3 ppg a pack-off occurred which broke down a formation and circulation was lost. Circulation was re-established with 16.0 ppg mud. The mud weight was then raised in stages from 16.2 ppg to give an adequate trip margin to log. Logs were run, after which lost circulation problems again occurred. It took up to January 8 1981 before problems were cured and drilling could commence. The well was drilled with seawater and pre-hydrated bentonite down to 593 m, with seawater/bentonite/native solids from 593 m to 1600 m, and with seawater/Drispac/lignosulphonate from 1600 m to TD.No hydrocarbons were encountered in the Danian - Late Cretaceous limestone. Some fluorescence was observed on limestones in the Tor Formation and in the Hidra Formation. Gas-bearing sands of the Ula Formation were encountered. Oil shows were recorded in these sands, generally described as dull yellow fluorescence and slow yellow cut.One conventional core was cut from 3143.7 - 3162.0 m in the top of the Ekofisk Formation. One RFT fluid sample was recovered from 4772.2 m in an Ula Formation sandstone unit. The sample consisted of 50% gas-cut mud, where the gas gravity was 0.78 (air = 1). The RFT results indicated pressures too high to be safely tested with the rig equipment and BOP's on the rig at that time.The well was suspended on 19 June 1989 pending further evaluation and possible testing.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]586.004876.00 -
Borekjerner i Sokkeldirektoratet
Borekjerner i Sokkeldirektoratet Kjerneprøve nummerKjerneprøve - topp dybdeKjerneprøve - bunn dybdeKjerneprøve dybde - enhet110314.010370.3[ft ]Borekjerner i Sokkeldirektoratet Total kjerneprøve lengde [m]17.2Borekjerner i Sokkeldirektoratet Kjerner tilgjengelig for prøvetaking?YES -
Palynologiske preparater i Sokkeldirektoratet
Palynologiske preparater i Sokkeldirektoratet Prøve dybdeDybde enhetPrøve typeLaboratorie4547.0[m]DCOD4580.0[m]DCOD4583.0[m]DCHRS4593.0[m]DCOD4596.0[m]DCHRS4596.0[m]DCOD4608.0[m]DCHRS4617.0[m]DCOD4620.0[m]DCOD4623.0[m]DCHRS4626.0[m]DCOD4635.0[m]DCHRS4647.0[m]DCHRS4647.0[m]DCOD4666.0[m]DCOD4684.0[m]DCOD4705.0[m]DCOD4721.0[m]DCOD4736.0[m]DCOD4754.0[m]DCOD4760.0[m]DCHRS4766.0[m]DCHRS4766.0[m]DCOD4781.0[m]DCOD4785.0[m]DCHRS4800.0[m]DCOD4803.0[m]DCOD4821.0[m]DCOD4839.0[m]DCOD4852.0[m]DCOD4858.0[m]DCOD4867.0[m]DCOD4873.0[m]DCOD -
Oljeprøver i Sokkeldirektoratet
Oljeprøver i Sokkeldirektoratet Test typeFlaske nummerTopp dyp
MD [m]Bunn dyp
MD [m]Væske typeTest tidspunktPrøver tilgjengeligDST0.000.0030.10.2000 - 00:00YES -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet9815302987298730043027306931303130318834444055408142124212432844684586458645904693469348104840 -
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]pdf0.10pdf0.31 -
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk)
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk) Dokument navnDokument formatDokumentstørrelse [MB]pdf14.71pdf7.45pdf4.03 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]CBL VDL14484836CDM37814849CDM AP37844877DIL SONIC37814784FDC CNL28964877GR91586ISF BHC15863794ISF BHC MSFL42674877ISF SONIC GR5861595MPT ML MLL37844877RFT00VELOCITY5864877 -
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 formasjonstestCONDUCTOR30153.936154.50.00LOTSURF.COND.20585.526593.41.40LOTINTERM.13 3/81585.917 1/21600.21.87LOTINTERM.9 5/83780.412 1/43799.92.02LOTLINER74872.28 1/24876.80.00LOT -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling1342.1271.027.3OIL BASED22.01.19901342.0420.019.2WATER BASED22.01.19901492.0420.016.8WATER BASED22.01.19902912.0420.08.1WATER BASED22.01.199010061.1435.0WATER BASED02.02.198113562.0420.013.9WATER BASED22.01.199014431.6255.0WATER BASED02.02.198115442.0419.09.6WATER BASED22.01.199015822.0419.014.4WATER BASED22.01.199016001.1942.0WATER BASED02.02.198120651.6254.0WATER BASED02.02.198130012.0421.06.7WATER BASED22.01.199031201.7155.0WATER BASED02.02.198134371.7152.0WATER BASED02.02.198134632.0422.09.6WATER BASED22.01.199038001.7345.0WATER BASED02.02.198140651.9252.0WATER BASED02.02.198141631.9247.0WATER BASED02.02.198144591.9256.0WATER BASED02.02.198146041.9250.0WATER BASED02.02.198147851.9662.0WATER BASED02.02.198148622.0518.09.1WATER BASED22.01.199048632.0419.09.6WATER BASED23.01.199048632.0455.014.4OIL BASED25.01.199048632.0455.08.1OIL BASED26.01.199048632.0439.014.4OIL BASED29.01.199048632.0434.09.6OIL BASED29.01.199048632.0434.09.6OIL BASED30.01.199048632.0533.010.1OIL BASED31.01.199048632.0533.010.1OIL BASED01.02.199048632.0522.05.3WATER BASED24.01.199048632.0455.08.1OIL BASED29.01.199048632.0434.09.6OIL BASED29.01.199049852.0147.0WATER BASED02.02.1981 -
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]PDF0.22