1/3-6
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Generell informasjon
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Brønnhistorie
GeneralWell 1/3-6 is located between the Gyda, Ula, and Blane fields in the Central Graben of the Norwegian North Sea.The primary objective was Late Jurassic Ula sands deposited as a rim syncline linked to salt diapirism. The Ula sands had been found hydrocarbon bearing in several wells in the surrounding blocks. Secondary objective was Late Paleocene "Cod sands" (Forties Formation), which could be present in the 1/3-6 area and could pinch out towards the diapir. The prognosed TD was 5030 m below MSL. The "Cod sands" were considered a low-probability target.Operations and resultsWildcat well 1/3-6 was spudded with the semi-submersible installation Dyvi Stena on 11 March 1991. Drilling performance went on without significant problems but the primary target of the well was not reached. The discovery of a significant hydrocarbon-bearing reservoir in the Paleocene activated the contingency measures of the programme (to set an extra 11 3/4" liner). For safety and technical reasons, and to allow for a proper test of the Paleocene, the well was stopped at 3586 m in the Late Cretaceous Hod Formation. No shallow gas was encountered while drilling. The well was drilled with a KCl polymer mud.The well encountered 85 m of hydrocarbon bearing Forties sands at 2913.5 m. The pay zone was 44 m thick with a hydrocarbon saturation of 56 %. No hydrocarbon-water contact was found. Apart from the hydrocarbons in the Forties sands oil shows were also recorded from 3519 to 3530 m in the Tor Formation.One conventional core was cut at 2921 m to 2928.5 m in the Forties sands. Segregated fluid samples were taken at three depths: 2923 m (filtrate and gas), 2937 m (filtrate and gas), and two samples at 2973.5 m (filtrate and gas in one and filtrate only in the other).The well was permanently abandoned on 22 June 1991 as a gas-condensate discovery.TestingThree DST tests were performed. DST 1A and DST 1B both tested the interval 2960.5 - 2977 m. Due to packer failureduring DST 1A this test was abnormally terminated and the re-test DST 1B was performed. DST 1B produced 78 Sm3 oil and 93300 Sm3 gas /day through a 44/64" choke in the final flow period. The GOR was 1196 Sm3/Sm3. The bottom hole temperature in this flow was 107.2 deg C.DST 2 tested the intervals 2913 - 2924 m + 2929 - 2953 m. The final flow in DST 2 was 153 Sm3 oil and 172500 Sm3 gas /day through a 48/64" choke. The GOR was 1131 Sm3/Sm3 and the condensate gravity was measured to 50.47 deg API. The pressure drawdown in this flow was 290 bar and the bottom hole temperature was 112.2 deg C. The maximum temperature in DST 2 was 123.1 deg C and was recorded in the flow with the lowest rates and lowest drawdown. It was believed to be closer to the true formation temperature than the one recorded in DST 1B. -
Borekaks i Sokkeldirektoratet
Borekaks i Sokkeldirektoratet Borekaks tilgjengelig for prøvetaking?YESBorekaks i Sokkeldirektoratet Borekaksprøve, topp dybde [m]Borekaksprøve, bunn dybde [m]1220.003585.00 -
Borekjerner i Sokkeldirektoratet
Borekjerner i Sokkeldirektoratet Kjerneprøve nummerKjerneprøve - topp dybdeKjerneprøve - bunn dybdeKjerneprøve dybde - enhet12921.02928.5[m ]Borekjerner i Sokkeldirektoratet Total kjerneprøve lengde [m]7.5Borekjerner i Sokkeldirektoratet Kjerner tilgjengelig for prøvetaking?YES -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet971600282328232836291429993103310332013530 -
Geokjemisk informasjon
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Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter
Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter Dokument navnDokument formatDokumentstørrelse [MB]pdf24.16pdf0.19 -
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk)
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk) Dokument navnDokument formatDokumentstørrelse [MB]pdf2.54pdf33.95 -
Borestrengtester (DST)
Borestrengtester (DST) Test nummerFra dybde MD
[m]Til dybde MD
[m]Reduksjonsventil størrelse
[mm]1.02961297717.52.02913295315.8Borestrengtester (DST) Test nummerEndelig avstengningstrykk
[MPa]Endelig strømningstrykk
[MPa]Bunnhullstrykk
[MPa]Borehullstemperatur
[°C]1.03.0001072.06.800112Borestrengtester (DST) Test nummerOlje produksjon
[Sm3/dag]Gass produksjon
[Sm3/dag]Oljetetthet
[g/cm3]Gasstyngde rel. luftGOR
[m3/m3]1.078933000.7800.78011962.01531725000.7710.7351131 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]DIT-D SLS MSFL GR28603153DIT-E SLS GR28603590DLL MSFL GR28603100FMS GR28603591LDL CNL GR28603591LDL CNL GR28603155LDL CNL GR29023017MWD - GR RES DIR1863586RFT-B GR29152961RFT-B HP GR29163360VSP9053575 -
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 formasjonstestCONDUCTOR30183.036185.00.00LOTINTERM.202000.0262003.01.80LOTINTERM.13 3/82861.017 1/22864.02.13LOTLINER9 5/83062.012 1/43065.00.00LOT -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling3611.03WATER BASED5501.03WATER BASED8571.5520.0WATER BASED12551.3938.0WATER BASED15731.5037.0WATER BASED16001.5522.0WATER BASED18201.7041.0WATER BASED19251.7456.0WATER BASED19301.7552.0WATER BASED20701.7563.0WATER BASED22101.7572.0WATER BASED22631.7547.0WATER BASED23561.7540.0WATER BASED25031.7543.0WATER BASED25891.7555.0WATER BASED26511.7558.0WATER BASED26731.7546.0WATER BASED26801.7552.0WATER BASED26831.7535.0WATER BASED27151.5528.0WATER BASED27311.7548.0WATER BASED28001.7548.0WATER BASED28461.7562.0WATER BASED28501.7527.0WATER BASED28511.7545.0WATER BASED28591.434.0WATER BASED28631.7553.0WATER BASED28701.7545.0WATER BASED28801.7525.0WATER BASED28881.434.0WATER BASED29211.7533.0WATER BASED29281.7534.0WATER BASED29581.434.0WATER BASED29581.434.0WATER BASED29591.43WATER BASED29941.7530.0WATER BASED30151.40WATER BASED30601.5546.0WATER BASED30611.7543.0WATER BASED30641.5533.0WATER BASED31101.7544.0WATER BASED31501.5523.0WATER BASED31571.7528.0WATER BASED31761.6425.0WATER BASED32001.5530.0WATER BASED32101.6024.0WATER BASED32701.5529.0WATER BASED33001.5533.0WATER BASED33261.5530.0WATER BASED33441.5531.0WATER BASED33881.5530.0WATER BASED33911.5530.0WATER BASED34651.5534.0WATER BASED35291.5532.0WATER BASED35541.5534.0WATER BASED35731.5542.0WATER BASED35861.50WATER BASED -
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]pdf0.21