Generell informasjon Attributt VerdiBrønnbane navn30/8-5TypeEXPLORATIONFormålAPPRAISALStatusJUNKEDFaktakart i nytt vinduHovedområdeNORTH SEAFeltFunnBrønn navn30/8-5Seismisk lokaliseringCGG NVT Inline 5142. Xline 21880UtvinningstillatelseBoreoperatørStatoil Petroleum ASBoretillatelse1678-LBoreinnretningBore dager80Borestart02.12.2017Boreslutt19.02.2018Plugget og forlatt dato19.02.2018Frigitt dato19.02.2020Publiseringsdato19.02.2020Opprinnelig formålAPPRAISALGjenåpnetNOInnholdNOT APPLICABLEFunnbrønnbaneNOAvstand, boredekk - midlere havflate [m]30.0Vanndybde ved midlere havflate [m]92.2Totalt målt dybde (MD) [m RKB]3563.0Totalt vertikalt dybde (TVD) [m RKB]3561.0Maks inklinasjon [°]3.2Temperatur ved bunn av brønnbanen [°C]136Eldste penetrerte formasjonSHETLAND GPGeodetisk datumED50NS grader60° 28' 15.43'' NØV grader2° 36' 15.58'' ENS UTM [m]6704085.14ØV UTM [m]478243.75UTM sone31NPDID for brønnbanen8315
BrønnhistorieGeneralWell 30/8-5 was drilled on the Tune Field on the Mokkukalven Fault Complex west of the Oseberg fault block in the North Sea. The primary objective was to collect data for the development of the Tune field, Statfjord reservoir.Operations and resultsA 9 7/8” shallow gas pilot hole was drilled at the well location to a total depth of 500 m. No indications of shallow gas were observed.Appraisal well 30/8-5 was spudded with the semi-submersible installation Deepsea Atlantic on 2 December 2017.It was drilled to 3637 m in a sand in the Shetland Group where a fluid influx was recorded. The blow-out preventer (BOP) was closed and the well was shut in. High pressure was measured at surface. The ensuing well control situation was successfully resolved. Based on formation stress and strength at the 14” shoe the well was plugged and cemented back to the shoe. A technical side-track 30/8-5 T2 was kicked off from 30/8-5 at 3007 m. The side-track was drilled approximately 20 m north of 30/8-5. The logs from the two wellbores correlate very well but show some differences towards TD. After a drill break at 3563 m, 7 m fluid influx was again recorded, 72 m TVD above the sand with high pressure and kick in 30/8-5. It was decided to terminate the well at 3563 m. The well was drilled with seawater and hi-vis pills down to 1153 m, with Innovert NS oil-based mud down to 3156 m and with Bara ECD oil-based mud from 3156 m to final TD.The well objectives were not achieved. No oil shows were observed cuttings in either wellbore. During the shut-in after the kick, the MWD memory data showed that the temperature stabilized at a 136 °C.No core was cut. No fluid sample was taken. Wire line logging was performed in the side-trackThe well was permanently abandoned on 19 February 2018 as a junk well.TestingNo drill stem test was performed.
Borekaks i OD
Borekaks i ODBorekaks tilgjengelig for prøvetaking?YES Borekaks i ODBorekaksprøve, topp dybde [m]Borekaksprøve, bunn dybde [m]3300.003636.00
Palynologiske preparater i OD
LoggerType loggTopp dyp for logg [m]Bunn dyp for logg [m]MWD LWD - AT OT GR RES31563637MWD LWD - GR RES122500MWD LWD - OT GR RES2123156T2 - MWD LWD - OT GR RES30163566T2 - AIT MSIP PEX ECS NGI30003563T2 - DCBL IBC GR30003555T2 - VSP GR16193555
Foringsrør og formasjonsstyrketester
Foringsrør og formasjonsstyrketesterType utforingUtforing diam.
[m]LOT/FIT slam eqv.
[g/cm3]Type formasjonstestCONDUCTOR36209.542212.00.00SURF.COND.201145.7261150.01.55FIT3001.00.01.82FIT143007.017 1/20.00.00LINER9 7/83560.012 1/43563.01.88FIT3560.00.01.91LOT3566.08 1/23566.00.00
BoreslamDybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling6031.0015.0Spud Mud6071.4130.0Innovert6071.6020.0KCl/Polymer6071.0013.0Spud Mud11501.2511.0BARADRIL-N11501.4130.0Innovert11501.6020.0KCl/Polymer11501.3124.0Innovert14371.3725.0Innovert17411.4532.0Innovert20501.5238.0Enviromul25201.4533.0Innovert30051.7034.0BaraECD30511.4533.0Innovert30701.7034.0BaraECD31191.4532.0Innovert31391.7034.0BaraECD31561.4537.0Innovert31561.6632.0BaraECD31581.7040.0BaraECD31581.8945.0BaraECD32301.8040.0BaraECD32741.8944.0BaraECD32741.4246.0BaraECD32761.5239.0Enviromul32931.7035.0BaraECD34001.9043.0BaraECD34081.7132.0BaraECD35631.7033.0BaraECD35631.8042.0BaraECD35881.7035.0BaraECD36361.8945.0BaraECD