6508/1-2
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Generell informasjon
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Brønnhistorie
GeneralWell 6508/1-2 was drilled on the Skaugumsåsen prospect in the south-western end of the Helgeland Basin in the Norwegian Sea, about ten kilometres south of the Norne field. The primary objective was to prove petroleum in reservoirs of the Early Jurassic Båt Group. A Secondary objective was to test the reservoir and HC potential of the Paleocene Tare Formation.Operations and resultsA 9 7/8" pilot well 6508/1-U-2 was drilled to 1305 m to check for shallow gas. No indications of shallow gas were seen. Wildcat well 6508/1-2 was spudded with the semi-submersible installation Aker Barents on 20 August 2011 and drilled to TD at 1810 m in the Early Jurassic Tilje Formation. No significant problem was encountered in the operations. The well was drilled with seawater and hi-vis pills down to 1301 m and with Glydril/KCl mud from 1301 m to TD.The Rogaland Group (Tare and Tang formations) contained some thin hydrocarbon bearing intervals around 1650 to 1660 m. The net pay here was 4.4 m with average porosity of 28%. The zone was overpressured and not in communication with the deeper reservoir zones, and headspace gas analyses from this section indicated the gas was diagenetic, not thermogenic. The top of the main reservoir, the Early Jurassic Ror Formation, was encountered at 1715.5 m underlying the Late Cretaceous Nise Formation. A gas column of 18.2 (1715.5 - 1733.7 m) was present in the Ror Formation, and an oil column of 22.3m was present in the Ror and Tilje Formations down to an OWC at 1756 m. Weak shows continued on the cores down to 1762 m otherwise no shows were seen in this well outside of the hydrocarbon bearing reservoir.Two cores were cut in the interval 1718.5 m - 1764 m in the Ror and Tilje formations. Wire line logging was performed in the 81/2" section, along with pressure points from the Tare Formation down through the Ror Formation. A gas sample was collected at 1716 m in the Ror Formation, an oil sample at 1754 m in the Ror Formation and a water sample at 1760.5 in the Tilje FormationThe well was permanently abandoned on 12 September 2011 as an oil and 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]1300.001810.00 -
Borekjerner i Sokkeldirektoratet
Borekjerner i Sokkeldirektoratet Kjerneprøve nummerKjerneprøve - topp dybdeKjerneprøve - bunn dybdeKjerneprøve dybde - enhet11718.51735.8[m ]21736.51763.9[m ]Borekjerner i Sokkeldirektoratet Total kjerneprøve lengde [m]44.7Borekjerner i Sokkeldirektoratet Kjerner tilgjengelig for prøvetaking?YES -
Oljeprøver i Sokkeldirektoratet
Oljeprøver i Sokkeldirektoratet Test typeFlaske nummerTopp dyp
MD [m]Bunn dyp
MD [m]Væske typeTest tidspunktPrøver tilgjengeligMDT1754.100.00OILYES -
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 formasjonstestCONDUCTOR36495.030495.00.00LOTSURF.COND.13 3/81294.017 1/21301.00.00LOTINTERM.9 5/81521.012 1/41525.00.00LOTOPEN HOLE1810.08 1/21810.00.00LOT -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]MDT GR16521760MFI DST GR12521807MWD435495MWD LWD - ARCVIS4951301MWD LWD - ARCVIS SONVIS4351525MWD LWD - GEOVIS ARCVIS ADNVIS S15251810PEX HRLA HGS CMR15251808VSP GR4181800 -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet435435130515601560157315731654170017001708171617161752 -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling4951.02Bentonite Spud mud13011.3914.0SW/Bentonite sweeps/Glydril13041.2917.0Glydril17501.3929.0Glydril17641.3928.0Glydril18101.3927.0Glydril