15/3-12 A
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Brønnhistorie
GeneralWell 15/3-12 A is a geological side-track to well 15/3-12 S, which discovered oil in the Sigrun East Hugin prospect on the Gudrun Terrace in the North Sea. Side-track 15/3-12 A was drilled to the Sigrun East Draupne prospect located west of the primary well and south of the Sigrun Field. The primary objective of 15/3-12 A was to verify down-flank continuation of the Hugin Formation reservoir and find the related hydrocarbon contacts. The secondary objective was to verify presence of Intra-Draupne Formation reservoir and hydrocarbons in same.Operations and resultsWildcat well 15/3-12 A was kicked off on 19 January 2020 from the main well at 2100 m in Lower Hordaland Group. It was drilled with the semi-submersible installation West Phoenix to 3593 m (3428 m TVD) in the Cromer Knoll Group. While POOH with 12 ¼” drilling BHA, the drill string got stuck at 2756 m in Ty sand. The BHA could not be freed and a technical side-track 15/3-12 A T2 was initiated with kick-off at 2215 m. Large amounts of caved cuttings was produced during kick-off. Drilling proceeded to final TD at 4038 m (3834 m TVD) in the Middle Jurassic Sleipner Formation. Both 15/3-12 A and 15/3-12 A T2 were drilled using Exploradrill oil-based mud from kick-off to TD.The Hugin reservoir was water filled and only cemented sand stringers were penetrated in the Draupne Formation. No oil shows were described in the well. Combined pressure data from the 15/12-3 S and 15/12-3 A T2 well indicated the following hydrocarbon contacts in the Hugin Formation: Free Water Level at 3614.6 m TVD in the upper reservoir unit, OWC at 3570 m TVD in the middle unit, and Free Water Level at 3605.4 m TVD in the lower unit. The contacts are based on pressure data and oil sample densities and are not penetrated by the wellbores.No cores were cut. MDT water samples were taken at 3898 m in the Hugin Formation in the 15/3-12 A T2 side-trackThe well was permanently abandoned on 2 March 2020 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]2120.003593.00 -
Palynologiske preparater i Sokkeldirektoratet
Palynologiske preparater i Sokkeldirektoratet Prøve dybdeDybde enhetPrøve typeLaboratorie3612.0[m]DCPETROSTR3621.0[m]DCPETROSTR3630.0[m]DCPETROSTR3639.0[m]DCPETROSTR3648.0[m]DCPETROSTR3657.0[m]DCPETROSTR3657.0[m]DCPETROSTR3666.0[m]DCPETROSTR3684.0[m]DCPETROSTR3690.0[m]DCPETROSTR3696.0[m]DCPETROSTR3702.0[m]DCPETROSTR3708.0[m]DCPETROSTR3714.0[m]DCPETROSTR3720.0[m]DCPETROSTR3726.0[m]DCPETROSTR3732.0[m]DCPETROSTR3738.0[m]DCPETROSTR3744.0[m]DCPETROSTR3750.0[m]DCPETROSTR3756.0[m]DCPETROSTR3762.0[m]DCPETROSTR3768.0[m]DCPETROSTR3774.0[m]DCPETROSTR3783.0[m]DCPETROSTR3792.0[m]DCPETROSTR3801.0[m]DCPETROSTR3810.0[m]DCPETROSTR3819.0[m]DCPETROSTR3828.0[m]DCPETROSTR3837.0[m]DCPETROSTR3846.0[m]DCPETROSTR3855.0[m]DCPETROSTR3864.0[m]DCPETROSTR3873.0[m]DCPETROSTR3882.0[m]DCPETROSTR3888.0[m]DCPETROSTR3894.0[m]DCPETROSTR3900.0[m]DCPETROSTR3906.0[m]DCPETROSTR3912.0[m]DCPETROSTR3918.0[m]DCPETROSTR3924.0[m]DCPETROSTR3930.0[m]DCPETROSTR3936.0[m]DCPETROSTR3942.0[m]DCPETROSTR3948.0[m]DCPETROSTR3954.0[m]DCPETROSTR3960.0[m]DCPETROSTR3966.0[m]DCPETROSTR3972.0[m]DCPETROSTR3978.0[m]DCPETROSTR3984.0[m]DCPETROSTR3990.0[m]DCPETROSTR3996.0[m]DCPETROSTR4002.0[m]DCPETROSTR4008.0[m]DCPETROSTR4014.0[m]DCPETROSTR4020.0[m]DCPETROSTR4026.0[m]DCPETROSTR4032.0[m]DCPETROSTR4037.7[m]DCPETROSTR -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet22602269226923372412255026642675267927302769281330523205336934463464352935293577 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]MWD LWD - PD OARCVIS TELES21103593 -
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 formasjonstestLINER9 7/83605.012 1/43605.01.89FIT