15/12-9 S
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Generell informasjon
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Brønnhistorie
GeneralWell 15/12-9 S was drilled on the Varg Field in the North Sea. The Varg Field reservoir is in Upper Jurassic sandstones at a depth of approximately 2700 metres. The Varg Field is segmented and includes several isolated compartments with varying reservoir properties. The well was drilled from a location near to the Varg A and Petrojarl A production installations and targeted a southern compartment in the Varg structure. The objective for the well was to prove hydrocarbons in Late Oxfordian sandstone and to reduce the uncertainty in the reserve estimate for this part of the Varg Field.Operations and resultsAppraisal well 15/12-9 S was spudded with the semi-submersible installation Deepsea Bergen on 17 July 1992 and drilled to TD at 3848 m (3213 m TVD) in the Triassic Skagerrak Formation. The well was drilled deviated from 623 m with a sail angle of ca 56 ° and then vertical again from ca 2400 m TVD through the target reservoir to TD. The well was drilled with seawater down to 620 m, with KCl/polymer mud from 620 mto 3226 m, and with Ancotemp/bentonite mud from 3226 m to TD.The well penetrated top reservoir, the Oxfordian sandstones, at 3385 m (2750 m TVD). The reservoir was oil-bearing down to a well-defined OWC at 3501.5 m (2867.0 m TVD). Seven cores were cut with 100% recovery. Core 1 to 6 were cut in the interval 3689 m to 3555 m and core 7 was cut from 3649.5 m to 3668.0 m. The core to log depth shift was -2.45 m for core 7; for the other cores the core depth was equal to the logger’s depth. Two segregated FMT oil samples were taken at 3498 m. Oil shows continued down to 3545mThe well is classified an oil appraisal well. It was suspended on 8 October 1992 and was later re-classified to oil production well 15/12-A-11 on the Varg Field.TestingTwo drill stem tests were performed in the Oxfordian sandstones.DST 1 tested the water zone from 3545 m to 3552 m (2910 – 2917 m). The test produced water at a rate of 890 m3/day through a 48/64” choke.DST 2 tested the oil zone from 3385 m to 3443 m (2750 – 2809 m). The test produced on average 132200 Sm3 gas and 1520 Sm3 oil /day through a 40/64” choke. The GOR was 87 Sm3/Sm3, the oil density was 0.852 g/cm3 and the gas gravity was 0.751 (air = 1) with 1.5% CO2 and 4% H2S. Maximum flowing temperature was 124.6 °C. -
Borekaks i Sokkeldirektoratet
Borekaks i Sokkeldirektoratet Borekaks tilgjengelig for prøvetaking?YESBorekaks i Sokkeldirektoratet Borekaksprøve, topp dybde [m]Borekaksprøve, bunn dybde [m]630.003815.00 -
Borekjerner i Sokkeldirektoratet
Borekjerner i Sokkeldirektoratet Kjerneprøve nummerKjerneprøve - topp dybdeKjerneprøve - bunn dybdeKjerneprøve dybde - enhet13389.03416.0[m ]23416.03443.6[m ]33443.63471.0[m ]43471.33499.0[m ]53499.13527.0[m ]63527.33555.0[m ]73652.03670.5[m ]Borekjerner i Sokkeldirektoratet Total kjerneprøve lengde [m]183.8Borekjerner 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 tilgjengeligDSTDST23385.000.00OIL28.09.1992 - 17:50YES -
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 formasjonstestCONDUCTOR30167.036167.00.00LOTINTERM.20599.026600.01.76LOTINTERM.13 3/82207.017 1/22210.01.91LOTINTERM.9 5/83313.012 1/43315.01.87LOTLINER5 1/23846.08 1/23848.00.00LOT -
Borestrengtester (DST)
Borestrengtester (DST) Test nummerFra dybde MD
[m]Til dybde MD
[m]Reduksjonsventil størrelse
[mm]1.03545019.02.03385020.6Borestrengtester (DST) Test nummerEndelig avstengningstrykk
[MPa]Endelig strømningstrykk
[MPa]Bunnhullstrykk
[MPa]Borehullstemperatur
[°C]1.02.0002.0100.000Borestrengtester (DST) Test nummerOlje produksjon
[Sm3/dag]Gass produksjon
[Sm3/dag]Oljetetthet
[g/cm3]Gasstyngde rel. luftGOR
[m3/m3]1.02.015200.8520.75187 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]CBIL HXDIP GR33503700CBL VDL CCL GR29253789CBL VDL GR13302191CBL VDL GR24503312CCL GR29303360CST GR33183833DIFL ACL ZDL CNL GR33063844DLL MLL GR33063676FMT GR34003673HXDIP GR33063848MWD1753848VSP15703730 -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet1071083140029302930294530053082309130913187326032953304330433853385362036883688 -
Geokjemisk informasjon
Geokjemisk informasjon Dokument navnDokument formatDokument størrelse [KB]pdf0.26pdf3.89pdf0.92 -
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk)
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk) Dokument navnDokument formatDokument størrelse [KB]pdf1.97pdf17.64 -
Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter
Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter Dokument navnDokument formatDokument størrelse [KB]pdf0.46pdf0.20 -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling6201.03DUMMY6201.03WATER BASED6231.3934.0DUMMY9601.3940.0DUMMY13871.3946.0DUMMY16971.3946.0DUMMY22251.3936.0WATER BASED22281.3931.0WATER BASED23331.3336.0WATER BASED24471.3931.0WATER BASED26131.5032.0WATER BASED28951.5348.0WATER BASED30351.5337.0WATER BASED31691.5339.0WATER BASED32921.5337.0WATER BASED33261.5340.0WATER BASED33301.3316.0WATER BASED33331.3327.0WATER BASED33851.3329.0WATER BASED33891.3327.0WATER BASED34431.3328.0WATER BASED34711.3325.0WATER BASED35271.3328.0WATER BASED35551.3321.0WATER BASED36101.3325.0WATER BASED36551.3332.0WATER BASED36901.3336.0WATER BASED38481.3334.0WATER BASED -
Palynologiske preparater i Sokkeldirektoratet
Palynologiske preparater i Sokkeldirektoratet Prøve dybdeDybde enhetPrøve typeLaboratorie1350.0[m]DCGEOCH1370.0[m]DCGEOCH1390.0[m]DCGEOCH1410.0[m]DCGEOCH1430.0[m]DCGEOCH1450.0[m]DCGEOCH1470.0[m]DCGEOCH1490.0[m]DCGEOCH1510.0[m]DCGEOCH1530.0[m]DCGEOCH1550.0[m]DCGEOCH1570.0[m]DCGEOCH1590.0[m]DCGEOCH1610.0[m]DCGEOCH1630.0[m]DCGEOCH1650.0[m]DCGEOCH1670.0[m]DCGEOCH1690.0[m]DCGEOCH1710.0[m]DCGEOCH1730.0[m]DCGEOCH1750.0[m]DCGEOCH1770.0[m]DCGEOCH1790.0[m]DCGEOCH1810.0[m]DCGEOCH1830.0[m]DCGEOCH1850.0[m]DCGEOCH1870.0[m]DCGEOCH1890.0[m]DCGEOCH1910.0[m]DCGEOCH1930.0[m]DCGEOCH1950.0[m]DCGEOCH1970.0[m]DCGEOCH1990.0[m]DCGEOCH2010.0[m]DCGEOCH2030.0[m]DCGEOCH2050.0[m]DCGEOCH2070.0[m]DCGEOCH2090.0[m]DCGEOCH2110.0[m]DCGEOCH2130.0[m]DCGEOCH2150.0[m]DCGEOCH2170.0[m]DCGEOCH2190.0[m]DCGEOCH2210.0[m]DCGEOCH2230.0[m]DCGEOCH2250.0[m]DCGEOCH2270.0[m]DCGEOCH2290.0[m]DCGEOCH2310.0[m]DCGEOCH2330.0[m]DCGEOCH2350.0[m]DCGEOCH2370.0[m]DCGEOCH2390.0[m]DCGEOCH2410.0[m]DCGEOCH2430.0[m]DCGEOCH2450.0[m]DCGEOCH2470.0[m]DCGEOCH2490.0[m]DCGEOCH2510.0[m]DCGEOCH2530.0[m]DCGEOCH2550.0[m]DCGEOCH2570.0[m]DCGEOCH2590.0[m]DCGEOCH2610.0[m]DCGEOCH2630.0[m]DCGEOCH2650.0[m]DCGEOCH2670.0[m]DCGEOCH2690.0[m]DCGEOCH2710.0[m]DCGEOCH2730.0[m]DCGEOCH2750.0[m]DCGEOCH2770.0[m]DCGEOCH2790.0[m]DCGEOCH2810.0[m]DCGEOCH2830.0[m]DCGEOCH2850.0[m]DCGEOCH2870.0[m]DCGEOCH2890.0[m]DCGEOCH2910.0[m]DCGEOCH2930.0[m]DCGEOCH2950.0[m]DCGEOCH2970.0[m]DCGEOCH2990.0[m]DCGEOCH3010.0[m]DCGEOCH3030.0[m]DCGEOCH3050.0[m]DCGEOCH3070.0[m]DCGEOCH3080.0[m]DCGEOCH3327.0[m]DC3371.0[m]DC3391.6[m]C3391.6[m]C3399.2[m]CSTATOIL3438.1[m]C3447.6[m]C3454.3[m]CSTATOIL3459.6[m]C3462.5[m]CSTATOIL3478.8[m]CSTATOI3490.4[m]C3509.3[m]C3526.4[m]C3554.4[m]C3654.4[m]C3661.0[m]C3661.2[m]C3669.2[m]C3707.0[m]C -
Tynnslip i Sokkeldirektoratet
Tynnslip i Sokkeldirektoratet DybdeEnhet3525.70[m ]3532.10[m ]3532.70[m ]