6406/3-4
Eksport: PDF
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Generell informasjon
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Brønnhistorie
GeneralWell 6406/3-4 was drilled to appraise the Trestakk oil discovery made with well 6406/3-2. The primary purpose of the well was to appraise hydrocarbon accumulations of significant amounts in the Middle Jurassic reservoirs down flanks on the Trestakk structure. Secondary objectives were to check for hydrocarbon accumulations deeper than the structural closure of the main field, to verify the geophysical and structural interpretation, and improve the geological, paleontological and geochemical understanding of the area. Total depth was to be 50 m into the Ti1je Formation.Operations and resultsAppraisal well 6406/3-4 was spudded with the Dyvi Offshore semi-submersible installation Dyvi Delta on 25 September 1987 and drilled to TD at 4414 m in Early Jurassic Tilje Formation. The well was drilled with seawater and hi-vis pills down to 1179 m, with gypsum/polymer mud from 1179 m to 3984 m, and with gel/lignosulphonate mud from 3984 m to TD. Drilling proceeded without significant problems and there were no signs of shallow gas. An expected pressure build-up started in Paleocene and reached its maximum at 1.50 g/cm3 EMV in the top of Cretaceous. After this the over-pressure decreased and was at 1.42 g/cm3 EMV close to top Jurassic.A very weak show was recorded in association with a 2.61% gas peak at 2469 m in the Springar Formation. From 2450 m in the Nise Formation to 2670 m shows were recorded on 50 % of sandstone samples. These shows appeared to be a volatile, light petroleum and continued, gradually disappearing, down to 2750 m in the Nise Formation. Top reservoir came in at 4018 m. There were good shows on cores down to 4078 m, but the reservoir qualities did not seem to be very good due to low permeability. In the Ile Formation poor shows were recorded on cores, indicating tight rocks or residual oil. Residual shows were recorded also in the Tofte Formation, while weak "background" shows were recorded in the Tilje Formation from 4372 m to TD. Geochemical analyses of core sample extracts were consistent with a suggested contact/spill point at 4039 m, and a change in the hydrocarbon shows characteristics was confirmed at 4052 m. The geochemical analyses further confirmed that core chip extracts from the interval 4021.18 m to 4051.94 m in the Garn Formation, and a DST sample from the same formation in the discovery well 6406/3-2 belonged to the same oil family. A proposed OWC at 4074 m was not verified by the geochemical analyses. Results of the well 6406/3-4 indicated that reservoir properties decreased down flanks on the structure. As a result the reserve estimates for the Trestakk structure for oil and associated gas were reduced after drilling this well. Six cores were cut, four in the Garn Formation in the interval 4020 - 4122 m, and two in the Ile Formation in the interval 4156 - 4213 m. Two FMT fluid samples were taken, one at 4105.3 m and another at 4108 m. The well was permanently abandoned on 29 December 1987 as a dry hole with shows.TestingFour drill stem tests were carried out, one in the Ile Formation (DST 1) and three in the Garn Formation (DST 2, 3 and 4). DST 1 (4175 m to 4198 m) produced 1.8 - 2 m3 fluid/day. No samples were taken. DST 2 (4103 m to 4117 m) produced 60 m3 water/day decreasing to 2.7 m3 water/day. Bottom hole samples were taken. DST 3 (4054 m to 4082 m) produced 7.4 m3 water/day decreasing to 4 m3 water /day. Bottom hole samples were taken. DST 4 (4025 m to 4044 m) produced 2.6 m3/day decreasing to 1.6 m3/day. No sampling. -
Borekaks i Sokkeldirektoratet
Borekaks i Sokkeldirektoratet Borekaks tilgjengelig for prøvetaking?YESBorekaks i Sokkeldirektoratet Borekaksprøve, topp dybde [m]Borekaksprøve, bunn dybde [m]1190.004413.00 -
Borekjerner i Sokkeldirektoratet
Borekjerner i Sokkeldirektoratet Kjerneprøve nummerKjerneprøve - topp dybdeKjerneprøve - bunn dybdeKjerneprøve dybde - enhet14020.04048.4[m ]24048.44076.6[m ]34076.54094.8[m ]44094.84122.7[m ]54156.04184.3[m ]64185.04212.8[m ]Borekjerner i Sokkeldirektoratet Total kjerneprøve lengde [m]158.9Borekjerner i Sokkeldirektoratet Kjerner tilgjengelig for prøvetaking?YES -
Kjernebilder
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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 formasjonstestCONDUCTOR30436.036442.00.00LOTSURF.COND.201157.0261179.01.60LOTINTERM.13 3/82648.017 1/22692.01.87LOTINTERM.9 5/83970.012 1/43984.01.98LOTLINER74414.08 1/24414.00.00LOT -
Borestrengtester (DST)
Borestrengtester (DST) Test nummerFra dybde MD
[m]Til dybde MD
[m]Reduksjonsventil størrelse
[mm]1.04175419825.42.0410341177.93.0405440824.0Borestrengtester (DST) Test nummerEndelig avstengningstrykk
[MPa]Endelig strømningstrykk
[MPa]Bunnhullstrykk
[MPa]Borehullstemperatur
[°C]1.043.0002.041.0003.040.000Borestrengtester (DST) Test nummerOlje produksjon
[Sm3/dag]Gass produksjon
[Sm3/dag]Oljetetthet
[g/cm3]Gasstyngde rel. luftGOR
[m3/m3]1.02.03.0 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]CBL VDL4301330CBL VDL25003974CBL VDL38174380CDL CN SPL GR39744406DIFL ACL GR39744414DIFL ACL GR CDL3231177DIFL ACL GR CDL11562665DIFL ACL GR CDL26483984DLL MLL GR39744412FMTHP GR40274391FMTHP GR40334105FMTHP GR41034402HRDIP39744411MWD - GR RES ROP DIR4424341VSP4404350 -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet3253251514199419942314231423802437243726552974327832783884390839083949402540254121416242244224427242994372 -
Spleisede logger
Spleisede logger Dokument navnDokument formatDokumentstørrelse [MB]pdf0.65 -
Geokjemisk informasjon
Geokjemisk informasjon Dokument navnDokument formatDokumentstørrelse [MB]pdf1.28 -
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk)
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk) Dokument navnDokument formatDokumentstørrelse [MB]pdf29.39 -
Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter
Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter Dokument navnDokument formatDokumentstørrelse [MB]pdf0.45pdf0.39 -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling3751.03WATER BASED29.12.19874421.059400.0WATER BASED28.09.19874421.05105.0WATER BASED28.09.19875071.03WATER BASED28.12.19875261.03WATER BASED28.12.19875861.064400.04.5WATER BASED28.12.19877311.05120.0WATER BASED28.09.198711011.05100.0WATER BASED29.09.198711791.0595.0WATER BASED30.09.198711791.05100.0WATER BASED01.10.198711791.05100.0WATER BASED02.10.198711791.05100.0WATER BASED05.10.198711791.061500.05.1WATER BASED05.10.198711791.051200.03.4WATER BASED05.10.198711821.061500.04.7WATER BASED06.10.198714421.121300.04.2WATER BASED07.10.198716761.201400.04.2WATER BASED08.10.198719451.501900.04.2WATER BASED09.10.198720141.2416.03.5WATER BASED23.11.198723871.696300.04.5WATER BASED22.12.198723871.696300.04.5WATER BASED23.12.198724501.6018.08.0WATER BASED14.10.198724501.6020.08.0WATER BASED16.10.198725251.695300.04.5WATER BASED21.12.198725251.705000.03.0WATER BASED21.12.198725251.695100.03.5WATER BASED21.12.198725381.696000.04.5WATER BASED28.12.198726481.5317.07.0WATER BASED22.10.198726481.5312.09.0WATER BASED26.10.198726481.5313.09.0WATER BASED27.10.198726481.5316.06.5WATER BASED02.11.198726481.5316.07.0WATER BASED06.11.198726481.5349.05.0WATER BASED19.10.198726481.5350.04.0WATER BASED19.10.198726481.5319.05.0WATER BASED19.10.198726481.5321.06.0WATER BASED20.10.198726481.5319.070.0WATER BASED21.10.198726481.5316.07.0WATER BASED23.10.198726481.5316.07.0WATER BASED26.10.198726481.5316.08.0WATER BASED26.10.198726481.5315.09.0WATER BASED28.10.198726481.5313.08.0WATER BASED29.10.198726481.5318.08.0WATER BASED30.10.198726481.5317.016.0WATER BASED02.11.198726481.5318.07.5WATER BASED02.11.198726481.5317.06.5WATER BASED03.11.198726481.5317.06.0WATER BASED04.11.198726481.5315.06.0WATER BASED05.11.198726481.5353.06.0WATER BASED09.11.198726481.5312.05.0WATER BASED09.11.198726481.5312.04.0WATER BASED11.11.198726651.6020.08.0WATER BASED16.10.198731751.6924.03.5WATER BASED18.12.198731751.5325.02.0WATER BASED17.12.198737591.5323.02.0WATER BASED16.12.198739701.2416.03.5WATER BASED23.11.198739701.2417.03.0WATER BASED23.11.198739701.2418.03.0WATER BASED23.11.198739701.2416.03.0WATER BASED24.11.198739701.2421.04.0WATER BASED25.11.198739701.2315.04.0WATER BASED18.11.198739701.2417.08.0WATER BASED18.11.198739701.2416.08.0WATER BASED19.11.198739701.2417.04.0WATER BASED20.11.198739701.2415.08.0WATER BASED12.11.198739701.2416.06.0WATER BASED13.11.198739701.2414.08.0WATER BASED16.11.198739701.2214.04.0WATER BASED16.11.198739701.2216.08.0WATER BASED16.11.198740501.2419.03.0WATER BASED14.12.198740501.2419.02.5WATER BASED15.12.198740861.2419.03.0WATER BASED14.12.198740861.2418.03.0WATER BASED08.12.198740861.2419.03.0WATER BASED09.12.198740861.2419.03.0WATER BASED10.12.198740861.2418.03.0WATER BASED11.12.198740981.2419.03.0WATER BASED07.12.198741251.246600.03.0WATER BASED03.12.198741251.246400.03.0WATER BASED04.12.198741251.2420.03.0WATER BASED07.12.198741251.2419.03.0WATER BASED07.12.198741251.246100.03.0WATER BASED02.12.198741561.2216.08.0WATER BASED16.11.198743711.246800.03.5WATER BASED30.11.198743711.246600.03.5WATER BASED30.11.198743711.2421.04.0WATER BASED01.12.198743711.246700.03.5WATER BASED30.11.198744141.2417.04.0WATER BASED20.11.1987 -
Palynologiske preparater i Sokkeldirektoratet
Palynologiske preparater i Sokkeldirektoratet Prøve dybdeDybde enhetPrøve typeLaboratorie2475.0[m]DCRRI2490.0[m]DCRRI2505.0[m]DCRRI2520.0[m]DCRRI2535.0[m]DCRRI2550.0[m]DCRRI2565.0[m]DCRRI2580.0[m]DCRRI2628.0[m]DCRRI2649.0[m]DCRRI2655.0[m]DCRRI2682.0[m]DCRRI2712.0[m]DCRRI2724.0[m]DCRRI2742.0[m]DCRRI2754.0[m]DCRRI2772.0[m]DCRRI2784.0[m]DCRRI2802.0[m]DCRRI2814.0[m]DCRRI2832.0[m]DCRRI2844.0[m]DCRRI2874.0[m]DCRRI2892.0[m]DCRRI2904.0[m]DCRRI2944.0[m]DCRRI2952.0[m]DCRRI2964.0[m]DCRRI2982.0[m]DCRRI3012.0[m]DCRRI3026.0[m]DCRRI3042.0[m]DCRRI3044.0[m]DCRRI3054.0[m]DCRRI3084.0[m]DCRRI3114.0[m]DCRRI3129.0[m]DCRRI3144.0[m]DCRRI3159.0[m]DCRRI3174.0[m]DCRRI3184.0[m]DCRRI3204.0[m]DCRRI3214.0[m]DCRRI3234.0[m]DCRRI3249.0[m]DCRRI3264.0[m]DCRRI3279.0[m]DCRRI3294.0[m]DCRRI3304.0[m]DCRRI3324.0[m]DCRRI3339.0[m]DCRRI3354.0[m]DCRRI3369.0[m]DCRRI3384.0[m]DCRRI3399.0[m]DCRRI3414.0[m]DCRRI3429.0[m]DCRRI3434.0[m]DCRRI3444.0[m]DCRRI3454.0[m]DCRRI3459.0[m]DCRRI3474.0[m]DCRRI3489.0[m]DCRRI3504.0[m]DCRRI3519.0[m]DCRRI3534.0[m]DCRRI3549.0[m]DCRRI3564.0[m]DCRRI3579.0[m]DCRRI3594.0[m]DCRRI3604.0[m]DCRRI3624.0[m]DCRRI3639.0[m]DCRRI3644.0[m]DCRRI3654.0[m]DCRRI3669.0[m]DCRRI3684.0[m]DCRRI3714.0[m]DCRRI3729.0[m]DCRRI3744.0[m]DCRRI3759.0[m]DCRRI3774.0[m]DCRRI3789.0[m]DCRRI3804.0[m]DCRRI3819.0[m]DCRRI3834.0[m]DCRRI3849.0[m]DCRRI3864.0[m]DCRRI3879.0[m]DCRRI3894.0[m]DCRRI3909.0[m]DCRRI3924.0[m]DCRRI3990.0[m]DCRRI3996.0[m]DCRRI3999.0[m]DCRRI4002.0[m]DCRRI4008.0[m]DCRRI4011.0[m]DCRRI4014.0[m]DCRRI4017.0[m]DCRRI4023.0[m]DCRRI4029.0[m]CRRI4030.0[m]CRRI4034.0[m]CRRI4035.0[m]CRRI4041.0[m]CRRI4042.0[m]CRRI4046.0[m]CRRI4049.0[m]CRRI4054.0[m]CRRI4062.0[m]CRRI4068.0[m]CRRI4074.0[m]CRRI4079.0[m]CRRI4080.0[m]CRRI4087.0[m]CRRI4088.0[m]CRRI4089.0[m]CRRI4090.0[m]CRRI4096.0[m]CRRI4100.0[m]CRRI4105.0[m]CRRI4107.0[m]CRRI4114.0[m]CRRI4116.0[m]CRRI4118.0[m]CRRI4121.0[m]CRRI4122.0[m]CRRI4137.0[m]DCRRI4140.0[m]DCRRI4152.0[m]DCRRI4156.0[m]CRRI4158.0[m]CRRI4160.0[m]CRRI4161.0[m]CRRI4166.0[m]CRRI4170.0[m]CRRI4171.0[m]CRRI4174.0[m]CRRI4176.0[m]CRRI4181.0[m]CRRI4182.0[m]CRRI4185.0[m]CRRI4187.0[m]CRRI4192.0[m]CRRI4194.0[m]CRRI4198.0[m]CRRI4204.0[m]CRRI4212.0[m]DCRRI4221.0[m]CRRI4227.0[m]DCRRI4230.0[m]DCRRI4239.0[m]DCRRI4245.0[m]DCRRI4260.0[m]DCRRI4275.0[m]DCRRI4290.0[m]DCRRI4305.0[m]DCRRI4320.0[m]DCRRI4335.0[m]DCRRI4350.0[m]DCRRI4365.0[m]DCRRI4380.0[m]DCRRI4395.0[m]DCRRI