6406/2-9 S
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Generell informasjon
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Brønnhistorie
Well 6406/2-9 S was drilled to test the Ragnfrid Nord prospect on the Halten Terrace in the Norwegian Sea. The primary exploration target for the well was to prove petroleum in Middle to Lower Jurassic reservoir rocks (in the Garn and Ile formation and in the Tofte formation, respectively). The secondary exploration target was to prove petroleum in Upper Cretaceous reservoir rocks (the Lange formation) and in the Lower Jurassic (the Tilje formation), in the event of discovery in the overlying Tofte formation.Operations and resultsWildcat well 6406/2-9 S was spudded with the semi-submersible installation West Phoenix on 3 October 2018 and drilled to TD at 4983 m (4919 m TVD) in the Early Jurassic Tilje Formation. The well was drilled with seawater and hi-vis pills down to 1515 m, with Innovert oil-based mud from 1515 m to 3429 m, and with non-aqueous BaraECD mud from 3429 m to TD.In the primary exploration target, the well encountered a gas/condensate column of about 10 metres in the Tofte formation with moderate reservoir properties. A gas-water contact was assessed at 4737 m (4689 m TVD) and oil shows (direct fluorescence and visible cut) continued throughout the cored section to 4764 m. The entire Tofte formation totals about 140 metres, of which 120 m sandstone of poor to moderate reservoir quality are effective reservoir rocks. The cores documented a deformation/fault zone in the upper part of Tofte. The Garn and Ile formations had about 75 and 65 metres effective reservoir rock respectively, mainly with poor to moderate reservoir quality. Both formations are water bearing. In the secondary exploration target in the Lange formation, the well encountered several one to five-metre thick gas-bearing sandstone layers with poor reservoir quality in the interval 4266 to 4306 m. The uppermost layer has a three-metre gas column. This interval also had oil shows in the form of cut fluorescence. The upper part of the Tilje formation is about 105 metres, whereof 75 metres are effective reservoir rocks with water bearing sandstones, mainly with poor reservoir quality. There were no oil shows in the well apart from those mentioned in the Lange and Tofte formationsTwo cores were cut in the Tofte Formation. Core #1 was cut from 4743 to 4762 m with 98.4% recovery. Core 2 was cut from 4762 to 4764 m with 59.5% recovery. MDT fluid samples were taken in the Tofte Formation at 4737.4 m (condensate) and 4753.2 m (water). The condensate samples were contaminated ca 40% with mud.The well was permanently abandoned on 15 January 2019 as a gas/condensate discovery 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]1520.004982.00 -
Borekjerner i Sokkeldirektoratet
Borekjerner i Sokkeldirektoratet Kjerneprøve nummerKjerneprøve - topp dybdeKjerneprøve - bunn dybdeKjerneprøve dybde - enhet14743.04761.7[m ]24762.04763.2[m ]Borekjerner i Sokkeldirektoratet Total kjerneprøve lengde [m]19.9Borekjerner i Sokkeldirektoratet Kjerner tilgjengelig for prøvetaking?YES -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet31731715881982198224532453251025762576273229043486348636694306439744194419443545114511460146294700470047274880 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]APS HLDS ECS HNGS CMR43754988MDT45154759MDT45224954MDT47004737MSCT45124904MWD - ECO TELE47434983MWD - PDX5 ARC9 TELE3821515MWD - PDX6 ARC6 SADN8 TELE34264367MWD - PDX6 ECO STET TELE43674743MWD - TELE317382MWD L PDX6 ARC9 TELE15153426QAIT SON SCAN QA GEO43304988USIT HD SON SCAN ABC27904360USIT HD SON SCAN ABC27904360VSI424274795XLR47214827 -
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 formasjonstestCONDUCTOR36378.042381.00.00SURF.COND.201509.0261515.01.77FITINTERM.143418.017 1/23426.02.00FITLINER9 7/84369.512 1/44367.02.13FITOPEN HOLE4983.08 1/24983.00.00 -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling5951.6433.0Innovert15151.5842.0Innovert15291.5735.0Innovert17401.5835.0Innovert21151.5832.0Innovert23101.6340.0Innovert23101.6040.0Innovert25031.6340.0Innovert32621.6427.0Innovert32621.8336.0Innovert33661.6340.0Innovert34261.8635.0BaraECD34261.6343.0Innovert34291.8537.0BaraECD35201.8338.0Innovert35991.8539.0BaraECD38251.8842.0BaraECD39451.8342.0Innovert40541.8843.0BaraECD41561.8747.0BaraECD43201.8848.0BaraECD43681.8747.0BaraECD43681.9750.0BaraECD45051.9537.0BaraECD45051.9740.0BaraECD46301.9641.0BaraECD47621.9649.0BaraECD49831.9641.0BaraECD49831.9246.0BaraECD