6407/9-6
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Generell informasjon
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Brønnhistorie
GeneralWell 6407/9-6 was drilled on the Draugen Field in the Haltenbanken area off shore Mid Norway. The target was the Rogn Sandstone Formation of the Late Jurassic. The objectives were to identify the western edge of the RognFormation, to establish the reservoir properties and development of the basal shale, to evaluate the water injection potential in oil-bearing sand, and to calibrate the seismic velocity.Operations and resultsAppraisal well 6407/9-6 was spudded with the semi-submersible installation Borgny Dolphin 2 January 1986 and drilled to TD at 1800 m in the Early Jurassic Ror Formation. Drilling proceeded without significant problems. The well was drilled with seawater and bentonite down to807 m, with KCl/polymer mud from 807 m to 1603 m, and with chalk mud from 1603 m to TD.The Rogn Formation was encountered oil-bearing from the top at 1642.5 m (1617.5 m SS) down to the base at 1660 m (1633.5 m SS). Average reservoir quality over this 17.5 m interval was very good, with calculated hydrocarbon saturation of 79 % and an average porosity of 31 %. Core permeabilities in the oil-bearing interval typically ranged between 1 and 10 Darcy. The underlying Fangst Group was interpreted as fully water bearing below 1671 m (1646 m SS), however low hydrocarbon saturations were calculated in the interval 1662 m to 1671 m (1637 - 1646 m SS). These were confirmed by the observed fluorescence in the cores over this interval and by Dean-Stark fluid saturation measurements.Four cores were cut in the interval 1646 - 1690.2 m. An FMT survey gave the same reservoir oil and water gradients as in the other wells on Draugen, and it was found that the Rogn Formation and the Fangst Group belong to the same pressure regime. One FMT fluid sample was taken at 1652.5 m in the Rogn Formation. After the well was plugged an intermittent stream of gas bubbles was observed leaking from the wellhead. Analysis of a sample of the gas showed that it consisted of methane only. The rig abandoned the location and a programme for regular monitoring of the wellhead and gas leak activity was initiated.The well was suspended as an oil appraisal and possible water injection well on 13 March 1986.TestingOne DST test was performed in the Rogn Formation in the interval 1643 -1656 m. The test produced 1018 Sm3/day (6400 Stb/day) on a 56/64" choke. The GOR at separator was 18.4 Sm3/Sm3 (103 scf/stb), oil gravity was 40 deg API (0.825 g/cm3), gas gravity was 0.810 (air = 1), and CO2 content was 0.6%. Water injection in the same interval was tested with a maximum injection of 2385 Sm3/day (15000 bbl/day). -
Borekaks i Sokkeldirektoratet
Borekaks i Sokkeldirektoratet Borekaks tilgjengelig for prøvetaking?YESBorekaks i Sokkeldirektoratet Borekaksprøve, topp dybde [m]Borekaksprøve, bunn dybde [m]390.001800.00 -
Borekjerner i Sokkeldirektoratet
Borekjerner i Sokkeldirektoratet Kjerneprøve nummerKjerneprøve - topp dybdeKjerneprøve - bunn dybdeKjerneprøve dybde - enhet11646.01657.8[m ]21660.01672.7[m ]31672.71677.0[m ]41678.81690.3[m ]Borekjerner i Sokkeldirektoratet Total kjerneprøve lengde [m]40.2Borekjerner i Sokkeldirektoratet Kjerner tilgjengelig for prøvetaking?YES -
Kjernebilder
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Palynologiske preparater i Sokkeldirektoratet
Palynologiske preparater i Sokkeldirektoratet Prøve dybdeDybde enhetPrøve typeLaboratorie1656.5[m]CRRI1656.8[m]CRRI1657.1[m]CRRI1657.8[m]CRRI1660.1[m]CRRI1660.3[m]CRRI1660.6[m]CRRI1661.0[m]CRRI1661.2[m]CRRI1661.7[m]CRRI1662.0[m]CRRI1662.2[m]CRRI1662.4[m]CRRI1662.4[m]CRRI1663.3[m]CRRI1671.4[m]CRRI1681.9[m]CRRI1684.4[m]CRRI1689.6[m]CRRI -
Oljeprøver i Sokkeldirektoratet
Oljeprøver i Sokkeldirektoratet Test typeFlaske nummerTopp dyp
MD [m]Bunn dyp
MD [m]Væske typeTest tidspunktPrøver tilgjengeligDSTSAMPLE81637.001646.0018.02.1986 - 00:00YES -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet30183283213421342137615401571157116111611164316601660174417751775 -
Spleisede logger
Spleisede logger Dokument navnDokument formatDokumentstørrelse [MB]pdf0.39 -
Geokjemisk informasjon
Geokjemisk informasjon Dokument navnDokument formatDokumentstørrelse [MB]pdf0.75 -
Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter
Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter Dokument navnDokument formatDokumentstørrelse [MB]pdf0.27pdf0.17 -
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk)
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk) Dokument navnDokument formatDokumentstørrelse [MB]pdf8.93pdf0.82 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]ACL CBL VDL GR3031628ACL CBL VDL GR10551735CDL CN GR365807CDL CN GR7851603CDL CNL GR15721799CORGUN16241787DIFL ACL GR278808DIFL ACL GR15721799DIFL ACL SP6751607DIPLOG16161794DLL MLL GR16121795FMT HP16521652VELOCITY3781787 -
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 formasjonstestCONDUCTOR30375.036382.00.00LOTSURF.COND.20804.026812.01.44LOTINTERM.13 3/81619.017 1/21628.01.68LOTINTERM.9 5/81776.012 1/41800.00.00LOT -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling3541.03WATER BASED06.01.19863751.03WATER BASED06.01.19863821.0611.016.0WATER BASED07.01.19863821.03120.0WATER BASED06.01.19864161.15WATER BASED10.03.19864161.15WATER BASED11.03.19864161.15WATER BASED12.03.19864841.1565.09.0WATER BASED25.05.19936091.1436.02.0WATER BASED28.05.19936131.1111.017.0WATER BASED08.01.19868101.1211.017.0WATER BASED09.01.19868101.1312.021.0WATER BASED09.01.19868101.03WATER BASED13.01.19868121.03WATER BASED13.01.19868121.03WATER BASED14.01.19868121.03WATER BASED12.01.19868171.3523.025.0WATER BASED16.01.19868601.1436.02.0WATER BASED02.06.19938601.1434.04.0WATER BASED25.05.19938601.1436.02.0WATER BASED28.05.199311261.3722.027.0WATER BASED17.01.198613761.3931.031.0WATER BASED20.01.198615391.3927.022.0WATER BASED20.01.198615541.1635.03.0WATER BASED25.05.199315891.1435.02.0WATER BASED25.05.199315891.1434.03.0WATER BASED25.05.199316281.3933.029.0WATER BASED21.01.198616281.3931.030.0WATER BASED20.01.198616281.3932.021.0WATER BASED21.01.198616281.4033.029.0WATER BASED30.01.198616331.4026.037.0WATER BASED30.01.198616411.15WATER BASED10.03.198616461.2016.019.0WATER BASED30.01.198616601.2016.019.0WATER BASED30.01.198616721.2021.026.0WATER BASED30.01.198616781.2018.023.0WATER BASED30.01.198617301.15WATER BASED11.02.198617381.15WATER BASED11.02.198617381.15WATER BASED12.02.198617381.15WATER BASED10.02.198617381.15WATER BASED14.02.198617381.15WATER BASED16.02.198617381.15WATER BASED20.02.198617381.15WATER BASED21.02.198617381.15WATER BASED24.02.198617381.15WATER BASED27.02.198617381.15WATER BASED28.02.198617381.15WATER BASED03.03.198617381.15WATER BASED04.03.198617381.15WATER BASED07.03.198617381.15WATER BASED07.03.198617381.03WATER BASED04.02.198617381.15WATER BASED06.02.198617381.15WATER BASED11.02.198617381.15WATER BASED17.02.198617381.15WATER BASED05.03.198617501.2020.027.0WATER BASED30.01.198618001.2119.026.0WATER BASED30.01.198618001.2120.028.0WATER BASED03.02.198618001.2121.030.0WATER BASED03.02.198618001.2120.030.0WATER BASED31.01.198618001.2121.022.0WATER BASED03.02.1986 -
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]PDF0.25