15/5-7
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Generell informasjon
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Brønnhistorie
GeneralWell 15/5-7 was drilled on the Dagny Discovery in the southern Viking Graben area of the North Sea. The primary objective of the well was to prove an oil leg beneath the proven gas in the Dagny structure and establish hydrocarbon contacts. Further objectives were the hydrocarbon characteristics in the Hugin and Sleipner Formations and to test the permeability and productivity of the reservoir. The second objective was to collect a water sample in the Hugin Formation.Operations and resultsAppraisal well 15/5-7 was spudded with the semi-submersible installation Transocean Winner on 5 July 2008 and drilled to TD at 4037m in the Triassic Skagerrak Formation. No shallow gas was observed by the ROV at the wellhead or by the MWD while drilling the 36" hole or the 17 1/2" hole. Operational problems included repairs of leakage in the BOP in the 17 1/2" section (close to 5 days NPT), directional deviation in the 8 1/2" section and loss of MDT tool in hole at final logging. The lost MDT was pushed to bottom before plugging back. The well was drilled with spud mud down to 1048 m and with KCl/polymer/Glycol (Glydril) mud from 1048 m to TD.The well penetrated rocks of Quaternary, Tertiary, Cretaceous and Jurassic age. The well penetrated the Hugin Formation reservoir at 3821 m (3815.3 m TVD), 59.7 m TVD shallower than prognosed. The well proved oil down to base of the Hugin Formation and it was decided to sidetrack the well for data acquisition in the water zone, including formation water sampling. Based on pressure gradients recorded in 15/5-7 and in the later sidetrack 15/5-7 A, the OWC was estimated at 3923 m TVD RKB. The sandstones of the Hugin Formations had good oil shows, otherwise no oil shows were recorded in the well.Three cores were cut. The first core was cut in Hugin Formation, the second core covered the transition zones between the Hugin and Sleipner Formations and the third core was cut in the Sleipner Formation. MDT pressures were recorded in the oil bearing Hugin Formation and into the Sleipner Formation. MDT oil samples were taken at 3828.8 m, 3830.5 m (sampled during mini DST from 3830 - 3831 m), and at 3883 m (sampled during mini DST from 3882.2 - 3883.2 m).The open hole was plugged back to 3036 m and prepared for sidetracking (15/5-7 A). The bore hole was abandoned on 7 September 2008 as an oil appraisal.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]1045.004037.00 -
Borekjerner i Sokkeldirektoratet
Borekjerner i Sokkeldirektoratet Kjerneprøve nummerKjerneprøve - topp dybdeKjerneprøve - bunn dybdeKjerneprøve dybde - enhet13826.03880.5[m ]23880.53927.4[m ]33927.43940.0[m ]Borekjerner i Sokkeldirektoratet Total kjerneprøve lengde [m]114.0Borekjerner i Sokkeldirektoratet Kjerner tilgjengelig for prøvetaking?YES -
Palynologiske preparater i Sokkeldirektoratet
Palynologiske preparater i Sokkeldirektoratet Prøve dybdeDybde enhetPrøve typeLaboratorie1105.0[m]DCICHRON1125.0[m]DCICHRON1145.0[m]DCICHRON1175.0[m]DCICHRON1195.0[m]DCICHRON1215.0[m]DCICHRON1245.0[m]DCICHRON1265.0[m]DCICHRON1285.0[m]DCICHRON1305.0[m]DCICHRON1325.0[m]DCICHRON1345.0[m]DCICHRON1365.0[m]DCICHRON1385.0[m]DCICHRON1405.0[m]DCICHRON1425.0[m]DCICHRON1445.0[m]DCICHRON1465.0[m]DCICHRON1485.0[m]DCICHRON1505.0[m]DCICHRON1525.0[m]DCICHRON1545.0[m]DCICHRON1565.0[m]DCICHRON1585.0[m]DCICHRON1605.0[m]DCICHRON1625.0[m]DCICHRON1645.0[m]DCICHRON1665.0[m]DCICHRON1685.0[m]DCICHRON1705.0[m]DCICHRON1725.0[m]DCICHRON1745.0[m]DCICHRON1765.0[m]DCICHRON1785.0[m]DCICHRON1805.0[m]DCICHRON1825.0[m]DCICHRON1845.0[m]DCICHRON1865.0[m]DCICHRON1885.0[m]DCICHRON1905.0[m]DCICHRON1925.0[m]DCICHRON1945.0[m]DCICHRON1965.0[m]DCICHRON1985.0[m]DCICHRON2005.0[m]DCICHRON2025.0[m]DCICHRON2045.0[m]DCICHRON2065.0[m]DCICHRON2085.0[m]DCICHRON2595.0[m]DCICHRON2605.0[m]DCICHRON2615.0[m]DCICHRON2625.0[m]DCICHRON2635.0[m]DCICHRON2645.0[m]DCICHRON2655.0[m]DCICHRON2669.0[m]DCICHRON3666.0[m]DCICHRON3672.0[m]DCICHRON3681.0[m]DCICHRON3687.0[m]DCICHRON3693.0[m]DCICHRON3699.0[m]DCICHRON3705.0[m]DCICHRON3711.0[m]DCICHRON3720.0[m]DCICHRON3729.0[m]DCICHRON3735.0[m]DCICHRON3741.0[m]DCICHRON3747.0[m]DCICHRON3753.0[m]DCICHRON3756.0[m]DCICHRON3762.0[m]DCICHRON3768.0[m]DCICHRON3774.0[m]DCICHRON3780.0[m]DCICHRON3786.0[m]DCICHRON3792.0[m]DCICHRON3798.0[m]DCICHRON3804.0[m]DCICHRON3810.0[m]DCICHRON3816.0[m]DCICHRON3835.6[m]COREICHRON3843.3[m]COREICHRON3844.5[m]COREICHRON3845.2[m]COREICHRON3867.3[m]COREICHRON3870.2[m]COREICHRON3873.4[m]COREICHRON3881.4[m]COREICHRON3882.9[m]COREICHRON3891.3[m]COREICHRON3894.9[m]COREICHRON3895.5[m]COREICHRON3900.0[m]COREICHRON3904.2[m]COREICHRON3907.2[m]COREICHRON3910.1[m]COREICHRON3914.7[m]COREICHRON3917.0[m]COREICHRON3917.5[m]COREICHRON3918.9[m]COREICHRON3919.2[m]COREICHRON3925.4[m]COREICHRON3926.2[m]COREICHRON3927.5[m]COREICHRON3929.5[m]COREICHRON3933.2[m]COREICHRON3937.7[m]COREICHRON3938.8[m]COREICHRON3939.0[m]COREICHRON -
Oljeprøver i Sokkeldirektoratet
Oljeprøver i Sokkeldirektoratet Test typeFlaske nummerTopp dyp
MD [m]Bunn dyp
MD [m]Væske typeTest tidspunktPrøver tilgjengeligDST0.000.00OILYES -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet14579199117322110211021422190222226302660271927192790305333993399348036663666376238213821391940084008 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]DP SAMPLE38283883DSI FMI22504000MDT38254000MDT38303830MDT MINIDST38303830MDT MINIDST38823882MWD - ARCVRES9 PP10454037MWD - ARCVRES9-TELE1921045PEX HRLA26004025VSP6904010 -
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 formasjonstestCONDUCTOR30194.036198.00.00LOTSURF.COND.201039.0261048.01.92LOTINTERM.13 3/82657.017 1/22669.01.65LOTOPEN HOLE4037.08 1/24063.00.00LOT -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling1981.03spud mud10481.06spud mud26691.35KCL/poly40371.49KCL/poly -
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]pdf0.23