25/5-1 A
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Generell informasjon
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Brønnhistorie
GeneralAppraisal well 25/5-1 A was drilled as a sidetrack to well 25/5-1. The wells are located in the Northern part of block 25/5 near the crest of a westward tilted Jurassic fault structure that straddles both block 25/5 and block 25/2.The main purpose of the well was to prove additional accumulation and if possible determine an oil/water contact that might be compared with well 25/5-1. Also checking a possible spill point through the main fault mapped 4 km SSW of well 25/5-1.Operations and resultsAppraisal well 25/5-1A was spudded by Golar-Nor offshore a/s semi-submersible installation Nordtrym 1 August 1987, and completed 16 September 1987 at a depth of 3432 in the Early Jurassic Drake Formation. The Vestland Group came in at 3312 m (3050.9 m TVD MSL), 91.9 m TVD deeper than in 25/5-1 but with the same thickness as in 25/5-1. Top Dunlin Group / Drake Formation came in at 3403 m (3126.7 m TVD MSL). The whole reservoir was oil-saturated, confirming oil down to at least 3126.4 m TVD MSL, very close to the OWC that was estimated from the 25/5-1 pressure gradient data. However, a definite OWC was not observed. All in all the well supported a total vertical oil column of 166 m as estimated from well 25/5-1. The well was plugged and abandoned as an oil appraisal well.TestingNo drill stem test was performed. -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet14344458892095111021287134521702170220122152241227724052590261626162953314231503150322533123312332934033403 -
Spleisede logger
Spleisede logger Dokument navnDokument formatDokumentstørrelse [MB]pdf0.55 -
Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter
Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter Dokument navnDokument formatDokumentstørrelse [MB]pdf0.32pdf0.18 -
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk)
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk) Dokument navnDokument formatDokumentstørrelse [MB]pdf15.93 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]DIL LSS GR20303428DLL MSFL GR32603426LDT CNL NGT20303419MWD20303432RFT-TLC28852990RFT-TLC33193389SHDT GR26303425VDL GR20303426VSP19593400 -
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 formasjonstestINTERM.9 5/82030.012 1/42030.01.50LOTOPEN HOLE3432.08 1/23432.00.00LOT -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling20711.1626.07.8WATER BASED06.08.198720821.1835.08.8WATER BASED11.08.198721091.1733.08.8WATER BASED07.08.198721991.1738.09.3WATER BASED10.08.198722031.1638.010.7WATER BASED13.08.198722481.1842.010.7WATER BASED13.08.198723351.1837.08.8WATER BASED14.08.198724831.1943.08.8WATER BASED17.08.198725651.1832.015.6WATER BASED17.08.198725791.1840.011.7WATER BASED18.08.198726221.1936.011.7WATER BASED19.08.198726321.1936.010.7WATER BASED20.08.198727031.1938.010.7WATER BASED21.08.198727911.1934.012.7WATER BASED24.08.198728551.2041.014.7WATER BASED25.08.198729001.1940.014.7WATER BASED25.08.198729551.1939.012.7WATER BASED26.08.198730201.2045.014.2WATER BASED27.08.198731091.2045.014.7WATER BASED28.08.198731221.2045.014.7WATER BASED31.08.198732111.2044.012.7WATER BASED31.08.198733421.2046.015.6WATER BASED31.08.198734101.2040.011.2WATER BASED03.09.198734321.2031.07.3WATER BASED07.09.1987 -
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