6406/12-5 S
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Generell informasjon
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Brønnhistorie
GeneralWell 6406/12-5 S was drilled to test the central part of the Boomerang prospect on the Halten Terrace in the Norwegian Sea. The primary objective was to establish the presence and volume of moveable hydrocarbons in Intra Spekk and Melk formation sandstonesOperations and resultsWildcat well 6406/12-5 S was spudded with the semi-submersible installation Transocean Arctic on 22 September 2015 and drilled to TD at 4297 m (3734 m TVD) m in the Late Jurassic Melke Formation. After drilling top hole to 433 m a 9 7/8" pilot hole was drilled to 1134 m to investigate possible shallow gas intervals in the Nordland Group. No shallow gas or over-pressured water bearing zones were observed. In the 8 ½” section the string got stuck at 4107 m and after pulling free it was discovered that most of the bit body was lost in hole. Consequently, the hole was side-tracked from 3937 m and drilled without further significant problems to TD at 4297 m (3734 m TVD) in the Late Jurassic Melke Formation. The well was drilled with seawater and hi-vis pills down to 1225 m and with XP-07 oil-based mud from 1225 m to TD.Top Spekk Formation was reached at 3741 m (3192.3 m TVD) and consisted of laminated mudstone overlying a thin sandstone with moderate reservoir quality resting on a 140 m thick unit of mainly silty to fine-grained sandstones with a shaly upper part. Top of the Melke Formation was reached at 3920.5 m (3347.8 m TVD) and is followed by 218 m TVD of intra Melke sandstones of moderate quality with top at 3962 m (3384.3 m TVD). Petrophysical interpretation showed that reservoir porosities in the intra Spekk and Melke sandstones were good ranging from 8 to 20 % with permeabilities of up to 1200 mD based on sidewall core analyses. The pressure data indicate communication across the Spekk and Melke Formations reservoirs with a near hydrostatic gradient. The only oil shows observed during drilling was cut fluorescence and residual fluorescent ring on cuttings in the interval 3966 to 3978 m in the uppermost part of the Intra-Melke sandstone.No cores were cut. An MDT water sample was taken at 3965.5 m.The well was permanently abandoned on 12 November 2017 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]1230.004108.00 -
Oljeprøver i Sokkeldirektoratet
Oljeprøver i Sokkeldirektoratet Test typeFlaske nummerTopp dyp
MD [m]Bunn dyp
MD [m]Væske typeTest tidspunktPrøver tilgjengeligMDT0.000.00YESMDT0.000.00BASE OILYES -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet360360107511251125188218822010222522252336253631463146372937413741374437693811392139634189 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]GR RES ECD DIR360432LWD - ATBRES NBINC NBGR ECD MPR40904108LWD - ATBRES NBINC NBGR TT ECD M36254090LWD - ATK ZTKR ZTKG COP OTKII SD22643625LWD - GR RES PWD DIR3601225LWD - GR RES PWD SON DIR12252264T2 GR DSL CN ZDL36164296T2 GR GX PL ORIT UXPL36164288T2 GR XMAC HDIL ORIT3604294T2 LWD - NGRES NBGR ECD MPR DEN39374297T2 PCOR SWC37454287T2 PCX PRES SAMP37454275T2 VSP BHS9274287 -
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 formasjonstestCONDUCTOR30428.036432.50.00PILOT HOLE1134.09 7/81134.00.00SURF.COND.201219.0261225.00.001228.01228.01.64FITINTERM.13 3/82256.017 1/22264.00.002267.02267.01.87FITINTERM.9 5/83617.012 1/43625.00.003628.03628.01.91LOTOPEN HOLE4297.08 1/24297.00.00 -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling4321.3421.0KCL/POLYMER/GEM6001.0140.0Sweeps11001.3421.0KCL/POLYMER/GEM12251.4932.0XP-07 low ECD12251.3421.0KCL/POLYMER/GEM16801.5133.0XP-07 low ECD19241.5434.0XP-07 low ECD24301.5445.0XP-07 low ECD30311.5438.0XP-07 low ECD36251.5432.0XP-07 low ECD40051.5437.0XP-07 low ECD42971.5441.0XP-07 low ECD