2/4-14
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Generell informasjon
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Brønnhistorie
GeneralWell 2/4-14 was designed to drill the same structure on the Steinbit Terrace as well 2/4-13, which was junked on 6 October 1988 due to technical problems. The wells were drilled in the middle of a structural/stratigraphic closure on a rotated fault block. Their primary objectives were to assess the hydrocarbon potential of the main structure in block 2/4. The target was expected Late Jurassic sandstone.Operations and resultsWildcat well 2/4-14 was spudded with the semi-submersible installation Treasure Saga on 6 October 1988, 53.4 m NNW of the 2/4-13 location. It was drilled to TD at 4734 m in the Late Jurassic Tyne Group. The well was drilled with spud mud and gel down to 916 m, with KCl mud from 916 m to 4453 m, and with Hi Temp Polymer mud from 4453 m to TD.Drilling went without significant problems down to 3687 m in the 12 1/4" section. On trip out of hole the drill string got stuck with the bit at 3538 m. The pipe could not be freed and a cement plug was set from 3475 m to 3395 m. A technical sidetrack was kicked off from 3415 m to 3463 m. Due to high temperatures the MWD worked only in part, but drilling of the remaining part of the 12 1/4" section to 4453 m proceeded without significant problems. The 8 1/2" hole was drilled to 4713 m where gas cut mud were observed with a maximum gas reading of 68 %. The hole was drilled to 4714 m when the mud weight was increased to 2.10 SG. This mud weight was near the fracture gradient at the casing seat. The equivalent circulating density at the drilling pump rates exceeded the fracture gradient at the casing seat. At 4734 m the well kicked, and gained a total 6.5 m3. The well was shut in and several attempts were made to gain control, without success. Coil tubing was run in to 4691 m and drill pipe circulated to seawater. A 1/2 bbl was taken and the well closed in. Finally, as the drill pipe started to come out of the hole, the shear-rams were activated and the drill pipe was cut on 20 January 1989. The well now developed into an underground blow out. An attempt to bullhead the well was performed, but the kill hose burst at the gooseneck. A new safety plug and no-go cap was entered in the BOP, and annular preventer closed from surface. On 31 January 1989 anchors were pulled and the well was suspended for re-entry with a different rig. Treasure Saga left the location for drilling a relief well ca 1 km to the south (2/4-15 S) to assist in killing operations.No hydrocarbon bearing intervals were detected above the Mandal Formation at 4708 m. The MWD logs and the cutting descriptions indicated two thin oil bearing sand stringers in the interval from 4708 - 4713.5 m. A third sandstone came in at 4733 m where the well kicked. No cores were cut in this well. The well is classified as a minor 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]2520.004729.00 -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet9417663142314231623176321732623307331833183443401045424561463446344654470247024729 -
Spleisede logger
Spleisede logger Dokument navnDokument formatDokumentstørrelse [MB]pdf0.67 -
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk)
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk) Dokument navnDokument formatDokumentstørrelse [MB]pdf2.50pdf18.70 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]ACBL VDL932509CDL CNL GR25094453COREGUN25224447DIPLOG30004452FMT34743603LSBHC DDL GR25094449MWD - GR RES DIR2184734VSP16854450 -
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 formasjonstestCONDUCTOR30215.036217.00.00LOTSURF.COND.20901.026916.01.82LOTINTERM.13 3/82509.017 1/22526.02.03LOTINTERM.9 5/84437.012 1/44437.02.18LOTOPEN HOLE4734.08 1/24734.00.00LOT -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling2131.06WATER BASED18.10.19882171.06WATER BASED18.10.19882171.066.016.3WATER BASED18.10.19887661.165.014.4WATER BASED18.10.19889161.164.07.7WATER BASED18.10.19889161.206.07.7WATER BASED18.10.19889161.2012.02.4WATER BASED18.10.19889161.20WATER BASED18.10.19889311.2013.02.9WATER BASED18.10.198813441.3322.05.3WATER BASED18.10.198817691.4036.07.7WATER BASED18.10.198821231.5532.08.7WATER BASED19.10.198822571.5537.06.3WATER BASED24.10.198824071.6032.05.3WATER BASED24.10.198825261.6022.05.8WATER BASED24.10.198825261.6030.06.3WATER BASED24.10.198825261.6120.05.3WATER BASED24.10.198825261.6030.05.8WATER BASED24.10.198828031.6130.07.2WATER BASED26.10.198830321.6530.08.2WATER BASED26.10.198830601.6627.07.7WATER BASED28.10.198831771.6521.04.8WATER BASED28.10.198832181.6528.06.3WATER BASED07.11.198832731.6534.08.7WATER BASED07.11.198832851.6530.06.3WATER BASED07.11.198832851.6532.07.2WATER BASED07.11.198833121.6531.05.8WATER BASED07.11.198833411.6531.05.3WATER BASED07.11.198833881.6526.05.8WATER BASED07.11.198834211.6526.05.8WATER BASED07.11.198834231.6825.04.8WATER BASED24.11.198834411.6527.05.8WATER BASED07.11.198834441.6821.03.4WATER BASED24.11.198834641.6822.05.3WATER BASED25.11.198835231.6527.06.8WATER BASED07.11.198835611.6821.04.8WATER BASED25.11.198836221.6830.05.8WATER BASED28.11.198836601.6826.06.8WATER BASED28.11.198836871.6530.07.7WATER BASED11.11.198836871.6536.08.7WATER BASED11.11.198836871.6520.03.9WATER BASED14.11.198836871.6523.04.4WATER BASED14.11.198836871.6520.03.9WATER BASED15.11.198836871.6520.03.4WATER BASED17.11.198836871.6528.04.8WATER BASED24.11.198836871.6822.04.8WATER BASED24.11.198836871.6525.04.8WATER BASED14.11.198836871.6520.03.4WATER BASED16.11.198836871.6520.04.8WATER BASED18.11.198837161.6825.07.2WATER BASED28.11.198837451.6826.05.8WATER BASED29.11.198837731.6824.06.8WATER BASED30.11.198838101.6821.06.8WATER BASED01.12.198839111.6823.06.8WATER BASED05.12.198839491.6823.05.8WATER BASED05.12.198839901.6822.04.8WATER BASED05.12.198840371.6822.04.8WATER BASED07.12.198840481.6822.04.8WATER BASED07.12.198840871.6821.06.3WATER BASED08.12.198841531.6819.07.2WATER BASED12.12.198842051.6822.06.3WATER BASED12.12.198842621.6823.05.8WATER BASED12.12.198843161.6823.05.3WATER BASED12.12.198843661.7224.07.2WATER BASED13.12.198844151.7226.011.5WATER BASED14.12.198844531.7221.04.4WATER BASED20.12.198844531.7222.03.4WATER BASED22.12.198844531.7216.02.0WATER BASED27.12.198844531.7217.02.4WATER BASED27.12.198844531.7219.05.3WATER BASED19.12.198844531.7223.04.8WATER BASED19.12.198844531.7220.03.4WATER BASED20.12.198844531.7221.03.9WATER BASED20.12.198844531.7222.03.4WATER BASED21.12.198844531.7222.03.4WATER BASED27.12.198844531.7214.02.9WATER BASED03.01.198944531.7216.02.4WATER BASED03.01.198944531.7220.03.9WATER BASED03.01.198944851.7219.03.4WATER BASED03.01.198945051.7221.04.4WATER BASED05.01.198945611.7218.04.4WATER BASED09.01.198945861.7217.03.9WATER BASED09.01.198946451.9321.05.8WATER BASED09.01.198946502.0021.02.9WATER BASED09.01.198946952.0824.03.9WATER BASED09.01.198947142.1024.05.3WATER BASED10.01.198947202.0923.03.4WATER BASED11.01.198947332.1226.04.4WATER BASED24.01.198947342.1240.07.7WATER BASED17.01.198947342.1224.02.4WATER BASED18.01.198947342.1224.02.4WATER BASED19.01.198947342.0923.03.9WATER BASED13.01.198947342.1243.09.6WATER BASED17.01.198947342.1224.02.4WATER BASED17.01.198947342.1224.02.4WATER BASED20.01.198947342.12WATER BASED24.01.198947342.1226.04.4WATER BASED24.01.198947342.12WATER BASED25.01.1989 -
Trykkplott
Trykkplott Porertrykksdataene kommer fra logging i brønnen hvis ingen annen kilde er oppgitt. I noen brønner der trykk ikke er logget, er det brukt informasjon fra formasjonstester eller brønnspark. Trykkdataene er rapportert inn til Oljedirektoratet og videre prosessert og kvalitetssikret av IHS Markit.Trykkplott Dokument navnDokument formatDokumentstørrelse [MB]pdf0.22