15/12-15
Eksport: PDF
-
Generell informasjon
-
Brønnhistorie
GeneralWildcat well 15/12-15 was drilled on the Maureen Terrace, ca 3 km west of the Varg and 15/12-12 Rev Discoveries. The main object of the well was to drill to Middle Jurassic/Triassic strata with the aim to explore the hydrocarbon bearing potential of Oxfordian age sandstones analogues to the Varg West. Secondary objective was the hydrocarbon potential of Kimmeridge age sandstone immediately above the main Oxfordian reservoir. The well should measure reservoir pressure and fluid gradients, assess the reservoir quality of the Late Jurassic target reservoir, assess reservoir geometry, and confirm geophysical model in terms of depth to top and base reservoir.Operations and resultsWell 15/12-15 was spudded with the semi-submersible installation Deepsea Trym on 19 November 2004 and drilled to TD at 3300 m in the Middle Jurassic Sleipner Formation. Apart from some very slow drilling in the interval from 2454 m to 2492 m no significant problems were encountered in the operations. The well was drilled with seawater and hi-vis sweeps down to 1370 m, and with a salt saturated /polymer mud system (Performadril) from 1370 m to TD.Well 15/12-15 penetrated the Oxfordian sandstone at 3140.5 m. The sand was encountered 92 m TVDSS deeper than expected, and was water-wet. The overlying Kimmeridgian sands within the Heather Formation were approximately 96 metres thicker than prognosed and were also water-wet. Weak possible fluorescence was reported from cuttings within the Kimmeridgian reservoir but post-well geochemical analyses revealed no evidence for hydrocarbons of any kind. MDT pressure measurements found the reservoir to be pressure depleted.No cores were cut and no wire line fluid samples taken in the well.The well was permanently abandoned on 21 December 2004 as a dry well.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]1570.003032.00 -
Kjernebilder
-
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet113107013022448244824592512263626552881295629562962304532793279 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]MDT GR ACTS ECRD31483172MWD - DGR DM EWR CTN ALD ACAL BA13702173MWD - DGR EWR CTN ALD ACAL BAT D21732454MWD - DGR EWR CTN ALD ACAL BAT D24543300MWD - DGR EWR DM1751370 -
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 formasjonstestCONDUCTOR30175.036176.00.00LOTSURF.COND.13 3/81364.017 1/21370.01.74LOTOPEN HOLE3300.012 1/43300.00.00LOT -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling1501.0330.0SPUD MUD10971.0350.0SPUD MUD13701.2550.0SPUD MUD19381.3536.0PERFORMADRIL24171.3536.0PERFORMADRIL24541.3533.0PERFORMADRIL26501.3524.0PERFORMADRIL33001.3534.0PERFORMADRIL -
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