24/9-13
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Generell informasjon
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Brønnhistorie
GeneralWell 24/9-13 was drilled to test the Rumpetroll prospect in the Vana Sub-basin in the North Sea, about 6 kilometres southwest of the Bøyla field. The primary objective was to prove petroleum in reservoir rocks (sand injectites) in the Eocene.Operations and resultsWildcat well 24/9-13 was spudded with the semi-submersible installation Deepsea Nordkapp on 16 June 2019 and drilled to TD at 2305 m in the Paleocene Heimdal Formation. After reaching TD and gas was gas was discovered a planned technical side-track was initiated for coring and fluid samples. The side-track 24/9-13 ST2 was kicked off from 1724 m in the main bore and drilled to TD at 2176 m. The side-track was drilled close to vertical with an 18 m centre-to-centre distance from the main bore at TD. Operations proceeded without significant problems. The main bore was drilled with KCl/polymer/GEM mud down to 1412 m and with Innovert oil-based mud from 1412 m to TD. The side-track was drilled with Innovert oil-based mud all through.Well 24/9-13 encountered gas in the interval 1943.5 to 1946.6 m in the primary well bore, whereof a total of 2 metres of sandstone with mainly good reservoir quality. The same sandstone was partially cored in the side-track. Several intra-Balder Formation sandstone layers with mainly good reservoir quality were also encountered in the interval 2074 to 2122 m. Net sandstone in Balder is 17 m and petrophysical analyses indicated they could be oil-bearing. The Balder sands were not present in the side-track. The sandstones are interpreted as being remobilised sand from the Heimdal and Hermod formations and injected into overlying stratigraphy in the Rogaland and Hordaland groups. The Heimdal Formation sandstone was water-wet.No fluid contacts could be established. An oil show was described on a core chip from the gas-bearing injectite sand in the side-track, otherwise there were no shows above the oil-based mud in main bore or side-track.Four cores were attempted in the technical side-track. Of these, core 1 from 1936 to 1942 had no recovery due to junk in the core head, while core 2 from 1942 to 1969 m had 99% recovery, core 3 from 2072 to 2099 m had 101% recovery and core 4 from 2099 to 2127 had 101% recovery. Core 2 had one meter of sandstone from 1943 to 1944, otherwise all recovered core was claystone. RDT fluid samples were taken in the side-track at 1946.15 m (gas).The well was permanently abandoned on 16 July 2019 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]250.002305.00 -
Borekjerner i Sokkeldirektoratet
Borekjerner i Sokkeldirektoratet Kjerneprøve nummerKjerneprøve - topp dybdeKjerneprøve - bunn dybdeKjerneprøve dybde - enhet21942.41968.9[m ]32072.02099.3[m ]42099.32126.5[m ]Borekjerner i Sokkeldirektoratet Total kjerneprøve lengde [m]81.0Borekjerner i Sokkeldirektoratet Kjerner tilgjengelig for prøvetaking?YES -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet15115126476376311041325194419472004200420742122216621782225 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]LWD - ABG DIR DGR XDR XBAT ALD14152305LWD - CTN PWD MRIL GT14152305LWD - DIR150216LWD - DIR GR RES PWD2161412 -
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 formasjonstestCONDUCTOR36213.442215.00.00SURF.COND.13 3/81399.017 1/21412.01.58FITINTERM.9 5/81703.012 1/41715.01.45FITOPEN HOLE2176.08 1/22176.00.00 -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling2161.20Water11201.25Water14051.30Synthetic14121.27Synthetic14121.30Water14201.30Synthetic14951.27Synthetic15001.30Synthetic19361.30Synthetic21541.29Synthetic21761.30Synthetic23051.30Synthetic