6408/4-1
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Generell informasjon
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Brønnhistorie
GeneralBlock 6408/4 is situated on the eastern side of the Trøndelag Platform off shore mid Norway. The drilled prospect is a large, gently dipping structure that is bounded by a southeast dipping fault with dip closure in all other directions.The objectives were to test for the development of the Late Jurassic Rogn sands and their hydrocarbon potential, and to test for hydrocarbons in the Middle Jurassic Fangst sands. Both Late Jurassic shales and the Lower Jurassic Åre coal unit were considered to be immature on the block. Long distance migration of oil was a critical aspect of the prospect and as such constituted a major risk.Operations and resultsWildcat well 6408/4-1 was spudded with the semi-submersible installation Vinni on 18 September 1988 and drilled to TD at 2725 m in the Triassic Grey Beds. There were certain problems with hole stability down to 830 m. The drill string twisted off at 370 m and had to be fished up. During logging the tool did not get past 622 m, and due to this there is a lack of conventional log between 622 - 830 m. Otherwise operations went without significant problems. The well was drilled with seawater and hi-vis pills down to 830 m and with KCl/polymer mud from 830 m to TD. No shallow gas was encountered.The prognosed sand in the Rogn Formation was not developed. A change from high gamma response shale to lower gamma response at 1734 m in the Spekk Formation was noted. The reservoir sections in the Middle and Early Jurassic Fangst Group were encountered at 1825 m to2015 m with 140 m net sand with 30.5% average porosity (log evaluation). The Båt group and the Triassic also had sands; the most massive of these was the Tilje Formation with 130 m net reservoir with 25.6% average porosity. All reservoir sections were water bearing and there were no shows or stain recorded while drilling. One core was cut between 1745 m to 1746.4 m in the Spekk Formation. A second core was attempted without success. No RFT was run in the well and no fluid sampling attempted.The well was permanently abandoned on 18 October 1988 as a dry hole.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]840.002725.00 -
Borekjerner i Sokkeldirektoratet
Borekjerner i Sokkeldirektoratet Kjerneprøve nummerKjerneprøve - topp dybdeKjerneprøve - bunn dybdeKjerneprøve dybde - enhet11745.01746.4[m ]Borekjerner i Sokkeldirektoratet Total kjerneprøve lengde [m]1.4Borekjerner i Sokkeldirektoratet Kjerner tilgjengelig for prøvetaking?YES -
Palynologiske preparater i Sokkeldirektoratet
Palynologiske preparater i Sokkeldirektoratet Prøve dybdeDybde enhetPrøve typeLaboratorie1340.0[m]DCSTRAT1370.0[m]DCSTRAT1400.0[m]DCSTRAT1430.0[m]DCSTRAT1460.0[m]DCSTRAT1480.0[m]DCSTRAT1490.0[m]DCSTRAT1500.0[m]DCSTRAT1512.0[m]DCSTRAT1526.0[m]DCSTRAT1530.0[m]DCSTRAT1542.0[m]DCSTRAT1554.0[m]DCSTRAT1560.0[m]DCSTRAT1572.0[m]DCSTRAT1584.0[m]DCSTRAT1590.0[m]DCSTRAT1602.0[m]DCSTRAT1614.0[m]DCSTRAT1620.0[m]DCSTRAT1632.0[m]DCSTRAT1644.0[m]DCSTRAT1650.0[m]DCSTRAT1662.0[m]DCSTRAT1668.0[m]DCSTRAT1674.0[m]DCSTRAT1679.0[m]SWCSTRAT1683.0[m]DCSTRAT1693.0[m]DCSTRAT1698.0[m]DCSTRAT1703.0[m]SWCSTRAT1704.0[m]DCSTRAT1713.0[m]DCSTRAT1720.0[m]DCSTRAT1722.0[m]DCSTRAT1734.0[m]DCSTRAT1745.0[m]SWCSTRAT1756.0[m]SWCSTRAT1763.0[m]SWCSTRAT1775.0[m]SWCSTRAT1782.0[m]DCSTRAT1792.0[m]SWCSTRAT1795.0[m]SWCSTRAT1800.0[m]SWCSTRAT1812.0[m]SWCSTRAT1822.0[m]SWCSTRAT1825.0[m]SWCSTRAT1839.0[m]DCSTRAT1854.0[m]DCSTRAT1863.0[m]DCSTRAT1872.0[m]DCSTRAT1878.0[m]SWCSTRAT1882.0[m]SWCSTRAT1888.0[m]SWCSTRAT1896.0[m]DCSTRAT1909.0[m]SWCSTRAT1917.0[m]DCSTRAT1924.0[m]SWCSTRAT1932.0[m]SWCSTRAT1944.0[m]DCSTRAT1953.0[m]SWCSTRAT1960.0[m]SWCSTRAT1970.0[m]SWCSTRAT1980.0[m]DCSTRAT1989.0[m]DCSTRAT1998.0[m]DCSTRAT2007.0[m]DCSTRAT2016.0[m]DCSTRAT2025.0[m]DCSTRAT2034.0[m]DCSTRAT2042.0[m]SWCSTRAT2052.0[m]DCSTRAT2056.0[m]SWCSTRAT2070.0[m]DCSTRAT2075.0[m]SWCSTRAT2088.0[m]DCSTRAT2097.0[m]DCSTRAT2106.0[m]DCSTRAT2115.0[m]DCSTRAT2127.0[m]DCSTRAT2136.0[m]SWCSTRAT2145.0[m]DCSTRAT2157.0[m]SWCSTRAT2163.0[m]DCSTRAT2172.0[m]DCSTRAT2181.0[m]DCSTRAT2190.0[m]DCSTRAT2199.0[m]DCSTRAT2208.0[m]DCSTRAT2217.0[m]DCSTRAT2226.0[m]DCSTRAT2235.0[m]DCSTRAT2244.0[m]DCSTRAT2253.0[m]SWCSTRAT2262.0[m]DCSTRAT2271.0[m]DCSTRAT2280.0[m]DCSTRAT2289.0[m]DCSTRAT2298.0[m]DCSTRAT2307.0[m]DCSTRAT2312.0[m]SWCSTRAT2316.0[m]DCSTRAT2325.0[m]SWCSTRAT2328.0[m]DCSTRAT2334.0[m]DCSTRAT2346.0[m]DCSTRAT2357.0[m]SWCSTRAT2373.0[m]DCSTRAT2378.0[m]SWCSTRAT2388.0[m]DCSTRAT2400.0[m]DCSTRAT2412.0[m]DCSTRAT2424.0[m]DCSTRAT2436.0[m]DCSTRAT2448.0[m]DCSTRAT2457.0[m]SWCSTRAT2460.0[m]DCSTRAT2472.0[m]DCSTRAT2484.0[m]DCSTRAT2496.0[m]DCSTRAT2502.0[m]DCSTRAT2517.0[m]DCSTRAT2528.0[m]SWCSTRAT2541.0[m]DCSTRAT2553.0[m]DCSTRAT2565.0[m]DCSTRAT2577.0[m]DCSTRAT2589.0[m]DCSTRAT2602.0[m]SWCSTRAT2613.0[m]DCSTRAT2625.0[m]DCSTRAT2638.0[m]SWCSTRAT2656.0[m]DCSTRAT2667.0[m]DCSTRAT2679.0[m]DCSTRAT2691.0[m]DCSTRAT2703.0[m]DCSTRAT2715.0[m]DCSTRAT2725.0[m]DCSTRAT -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet23677477413131313137416191619163616361666170217021797182518251945196820152015215723232603 -
Spleisede logger
Spleisede logger Dokument navnDokument formatDokumentstørrelse [MB]pdf0.31 -
Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter
Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter Dokument navnDokument formatDokumentstørrelse [MB]pdf0.41pdf0.20 -
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk)
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk) Dokument navnDokument formatDokumentstørrelse [MB]pdf9.87 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]CBL VDL2401673DIFL LSAC GR SP5751674DIFL LSAC GR SP16732720DIFL LSAC GR SP CAL236616DIPLOG16732721MWD RGD2362725SWC16792638VELOCITY2362720VSP10002708ZDEN CN GR CAL8201675ZDEN CN GR SPL CAL16732713 -
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 formasjonstestCONDUCTOR30340.036346.00.00LOTSURF.COND.20820.026830.01.53LOTINTERM.13 3/81673.017 1/21692.01.75LOTOPEN HOLE2725.012 1/42725.00.00LOT -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling2601.02WATER BASED19.09.19883461.06WATER BASED20.09.19883461.06WATER BASED21.09.19884151.06WATER BASED22.09.19888301.06WATER BASED23.09.19888301.06WATER BASED26.09.19888301.20WATER BASED26.09.19888301.20WATER BASED26.09.19888300.00WATER BASED27.09.19888300.00WATER BASED28.09.19888591.22WATER BASED29.09.198814331.36WATER BASED30.09.198816921.3925.015.0WATER BASED03.10.198816921.4025.015.0WATER BASED04.10.198816921.4226.017.0WATER BASED05.10.198816921.3825.015.0WATER BASED06.10.198817111.2115.09.0WATER BASED07.10.198817461.2016.012.5WATER BASED10.10.198819381.2214.011.0WATER BASED10.10.198823281.2317.013.5WATER BASED10.10.198824711.2115.011.5WATER BASED11.10.198827251.2517.013.0WATER BASED13.10.198827251.2517.013.5WATER BASED14.10.198827251.2115.011.0WATER BASED12.10.198827251.2517.013.5WATER BASED17.10.1988