6407/9-4
Eksport: PDF
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Generell informasjon
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Brønnhistorie
GeneralAppraisal well 6407/9-4 is the fourth well on the Draugen Field. The main objective was the Late Jurassic Rogn Formation. Wells 6407/9-1, 6407/9-2 and 6407/9-3 had previously encountered under-saturated 40 deg API oil in sandstones of the Late Jurassic Rogn Formation. Net oil sand thicknesses in the three previous wells were 39, 12 and 34 m, respectively. Precise definition of the OWC in well 6407/9-1 was precluded by poor quality lithology at the base of sequence. A clearly defined oil-water contact at 1638.5 m MSL was however encountered in well 6407/9-2. The purpose of this fourth well was to evaluate the reservoir quality and sand development on the north-west flank of the accumulation, and to evaluate the oil deliverability and water injection potential of the reservoir sands.Operations and resultsWell 6407/9-4 was spudded with the semi-submersible installation West Venture on 4 July 1985 and drilled to TD at 1820 m in the Early Jurassic Tilje Formation. No significant problems were encountered while drilling the well. The well was drilled with seawater and bentonite down to 820 m, with KCl/polymer mud from 820 m to 1635 m, and with chalk mud from 1635 m to TD.Light oil with low gas content was discovered in the Garn Formation, as the Rogn Formation proved to be only 2 m thick. The oil/water contact was found at 1672 m (1639 m MSL), the same contact that had been established in previous wells on the Draugen Field. This indicated communication in the Rogn and Garn Formations between the wells drilled so far on Draugen. No oil shows were recorded above the reservoir. Below OWC oil shows continued down to 1681 m, otherwise no further oil shows were observed.Five cores were cut from 1666 m to 1711.5 m in the Fangst Group. An RFT segregated fluid sample was taken at 1664.5 m in the upper Garn Formation.The well was permanently abandoned on 10 September 1985 as an oil appraisal well.TestingTo Drill Stem Tests were performed. One injection test at 1708 - 1713 m in the water zone, and one production test at 1662 -1667 m in the oil zone. Maximum injection rate in the water test was 2080 m3 /day. The oil test produced at maximum 998 Sm3 oil /day on a 64/64" choke. The GOR was ca 35 Sm3/Sm3, the oil density was 0.82, and the gas gravity was 0.82 (air = 1). Temperature measurements in the test gave a reservoir formation temperature of 71.1 deg C (160 deg F). -
Borekaks i Sokkeldirektoratet
Borekaks i Sokkeldirektoratet Borekaks tilgjengelig for prøvetaking?YESBorekaks i Sokkeldirektoratet Borekaksprøve, topp dybde [m]Borekaksprøve, bunn dybde [m]390.001820.00 -
Borekjerner i Sokkeldirektoratet
Borekjerner i Sokkeldirektoratet Kjerneprøve nummerKjerneprøve - topp dybdeKjerneprøve - bunn dybdeKjerneprøve dybde - enhet11666.01671.1[m ]21673.01674.7[m ]31676.31684.0[m ]41685.71695.0[m ]51695.51711.0[m ]Borekjerner i Sokkeldirektoratet Total kjerneprøve lengde [m]39.4Borekjerner i Sokkeldirektoratet Kjerner tilgjengelig for prøvetaking?YES -
Kjernebilder
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Oljeprøver i Sokkeldirektoratet
Oljeprøver i Sokkeldirektoratet Test typeFlaske nummerTopp dyp
MD [m]Bunn dyp
MD [m]Væske typeTest tidspunktPrøver tilgjengeligDSTTEST2A1662.001667.0016.08.1985 - 23:30YES -
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 formasjonstestCONDUCTOR30365.536375.00.00LOTSURF.COND.20804.526820.01.55LOTSURF.COND.20805.526820.01.55LOTINTERM.13 3/81622.017 1/21635.01.81LOTINTERM.9 5/81793.012 1/41820.00.00LOT -
Borestrengtester (DST)
Borestrengtester (DST) Test nummerFra dybde MD
[m]Til dybde MD
[m]Reduksjonsventil størrelse
[mm]1.0170817130.02.01662166825.4Borestrengtester (DST) Test nummerEndelig avstengningstrykk
[MPa]Endelig strømningstrykk
[MPa]Bunnhullstrykk
[MPa]Borehullstemperatur
[°C]1.02.0Borestrengtester (DST) Test nummerOlje produksjon
[Sm3/dag]Gass produksjon
[Sm3/dag]Oljetetthet
[g/cm3]Gasstyngde rel. luftGOR
[m3/m3]1.02.09620.8200.82036 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]CBL15901710CBL VDL7001620CST GR12581753ISF LSS GR365816ISF LSS GR8051626ISF LSS GR16221816LDL CNL GR365818LDL CNL GR8051628LDL CNL NGS16221817MSFL DLL GR16221813RFT16641664SHDT16221815SWC16661710VSP3651818 -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet277277887887140214021443157216101637163716581660166017021748176717671794 -
Spleisede logger
Spleisede logger Dokument navnDokument formatDokumentstørrelse [MB]pdf0.36 -
Geokjemisk informasjon
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Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk)
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk) Dokument navnDokument formatDokumentstørrelse [MB]pdf17.79pdf1.01 -
Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter
Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter Dokument navnDokument formatDokumentstørrelse [MB]pdf0.30pdf0.14 -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling2951.03WATER BASED05.07.19853751.03WATER BASED09.07.19853750.00WATER BASED10.07.19854171.0611.059.0WATER BASED10.07.19855061.20WATER BASED06.09.19857451.0641.016.0WATER BASED12.07.19858201.0950.026.0WATER BASED12.07.19858201.10120.0WATER BASED15.07.19858201.03WATER BASED15.07.19858201.30WATER BASED18.07.19858201.03WATER BASED15.07.19858201.03WATER BASED16.07.19858201.03WATER BASED16.07.19858200.00WATER BASED18.07.19858201.10120.0WATER BASED15.07.19858201.30WATER BASED18.07.198510001.3543.021.0WATER BASED19.07.198510101.20WATER BASED05.09.198510761.3653.024.0water based22.07.198510761.3653.024.0WATER BASED22.07.198510841.3853.04.0WATER BASED22.07.198514081.4050.05.0WATER BASED22.07.198514701.20WATER BASED04.09.198514771.15WATER BASED03.09.198515101.4047.05.0WATER BASED23.07.198516351.20WATER BASED02.08.198516351.4050.03.0WATER BASED25.07.198516351.4050.03.0WATER BASED23.07.198516351.4050.03.0WATER BASED25.07.198516351.4050.03.0WATER BASED26.07.198516351.4050.03.0WATER BASED26.07.198516351.20WATER BASED02.08.198516351.15WATER BASED20.08.198516661.1915.020.0WATER BASED29.07.198516731.15WATER BASED20.08.198516761.1915.018.0WATER BASED29.07.198516831.15WATER BASED20.08.198516831.15WATER BASED21.08.198516831.15WATER BASED21.08.198516831.15WATER BASED22.08.198516831.15WATER BASED23.08.198516831.15WATER BASED26.08.198516831.15WATER BASED27.08.198516831.15WATER BASED28.08.198516831.15WATER BASED29.08.198516831.15WATER BASED30.08.198516831.15WATER BASED02.09.198517001.2045.04.0WATER BASED31.07.198517551.15WATER BASED19.08.198517551.15WATER BASED20.08.198517551.15WATER BASED19.08.198517551.15WATER BASED09.08.198517931.13WATER BASED09.08.198518201.2015.019.0WATER BASED02.08.198518201.2017.023.0WATER BASED05.08.198518201.20WATER BASED05.08.198518201.15WATER BASED09.08.198518201.2044.04.0WATER BASED31.07.198518201.2015.019.0WATER BASED02.08.198518201.2017.023.0WATER BASED05.08.198518201.20WATER BASED05.08.198518201.15WATER BASED09.08.1985 -
Tynnslip i Sokkeldirektoratet
Tynnslip i Sokkeldirektoratet DybdeEnhet1674.00[m ]1680.00[m ]1681.00[m ]1688.00[m ]1688.00[m ]1688.00[m ]1691.00[m ]1691.00[m ]1691.00[m ]1692.00[m ]1692.00[m ]1692.00[m ]1692.00[m ]