6604/5-1
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Generell informasjon
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Brønnhistorie
GeneralWell 6604/5-1 was drilled to test the Balderbrå prospect in the Vøring Basin of the Norwegian Sea. The primary objective was to prove reservoir presence and hydrocarbon accumulations in Springar Sandstone intervals. TD was planned to be 150 m below the base of the deepest Springar Sandstone. In case of a discovery a technical side-track was planned to obtain cores from the reservoir.Operations and resultsA pilot hole 6604/5-U-1 was drilled 50 m away from the mainbore location in a 12 1/4" hole in order to identify the correct setting depth for the 20" x 13-3/8" casing below the ooze.Wildcat well 6604/5-1 was spudded with the semi-submersible installation West Phoenix on 10 January 2018 and drilled to TD at 3858 m in the Late Cretaceous Springar Formation. Gas was discovered, and the well was side-tracked at 3308 m to obtain cores from the hydrocarbn-bearing sandstones. The side-track reached TD at 3760 m in the Late Cretaceous Springar Formation. During P&A in the mainbore a leak in the slip joint between the gator lock and inner barrel was discovered. This led to a 10 days repair period before normal operations were resumed. The well was drilled with seawater and hi-vis pills down to 2375 m and with Innovert oil-based mud from 2382 m to TD. Innovert OBM was used also in the side-track.Three Springar was encountered at 3259 m. Intra-Springar sands were penetrated with tops in the mainbore at 3336 m, 3453 m, and 3582.5 m. In the side-track the sands were penetrated 1 – 2 m MD deeper. All three sands were gas filled with gas-down to contacts. Pressure measurements showed that the three sandstones have different pressure regimes. Weak, light-coloured shows were described in the two upper Springar sandstones, otherwise no oil shows were recorded in the well.Two cores were cut in the two lower and thickest Springar sandstones in the side-track. Core one was cut from 3450 to 3504 m with 101% recovery. The core-log depth shift for this core is 2.42 m. Core two was cut from 3579 to 3634 m with 102% recovery. The core-log depth shift for this core is 3.90 m. MDT gas samples were taken at 3339.7 m, 3457.7 m, and 3592.7 m.The well was permanently abandoned on 22 March 2018 as a gas discovery.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]2390.003857.65 -
Borekjerner i Sokkeldirektoratet
Borekjerner i Sokkeldirektoratet Kjerneprøve nummerKjerneprøve - topp dybdeKjerneprøve - bunn dybdeKjerneprøve dybde - enhet13450.03504.7[m ]23579.03634.1[m ]Borekjerner i Sokkeldirektoratet Total kjerneprøve lengde [m]109.8Borekjerner i Sokkeldirektoratet Kjerner tilgjengelig for prøvetaking?YES -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet1258125815041730173025132513259432593259 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]LWD - DIR12581348LWD - DIR GR RES PWD13482382LWD - DIR GR RES PWD SON DEN23823220LWD - DIR GR RES PWD SON DEN POR32203858MDT GR SATURN12573858T2-CMR NEXT HNGS32193760T2-LWD - DIR12581348T2-LWD - DIR GR RES PWD13482382T2-LWD - DIR GR RES PWD33083760T2-LWD - DIR GR RES PWD SO DE PO32203858T2-LWD - DIR GR RES PWD SON DEN23823220T2-MDT33403710T2-QGEO MSIP32193760T2-ZAIT ADT PEX HNGS32193760T2-ZVSP12003760 -
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 formasjonstestCONDUCTOR301344.0421348.00.00INTERM.13 3/82376.017 1/22382.01.34LOTINTERM.9 5/83219.012 1/43220.01.45LOTOPEN HOLE3858.08 1/23858.00.00 -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling13481.03Water13481.30Water14501.05Water21001.04Water21001.04Oil23421.05Water23821.12Water23821.30Water25611.14Oil30701.25Oil31571.15Oil32021.25Oil32211.25Oil32211.15Oil35041.25Oil38581.25Oil