7/11-5
Eksport: PDF
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Generell informasjon
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Brønnhistorie
GeneralBlock 7/11 was awarded in 1965 to the Phillips Group. The first commercial discovery (Cod) was found in this block in 1968. Both Norsk Hydro wells (7/11-5 and 7/11-6) were drilled in the relinquished area awarded to them in Licence 070. The main objective of well 7/11-5 was the Late Jurassic sandstones. The secondary objective was the Triassic sands.Operations and resultsWell 7/11-5 was spudded with the semi-submersible installation Treasure Seeker on 9 February 1982 and drilled to TD at 4478 m in the Triassic Smith Bank Formation. The drilling went forth without incident except for gumbo problems in the top of the 17 1/2" section and minor problems with tight hole in the 8 3/8" section. The well was drilled with sea water and hi-vis pills down to 615 m and with KCl/Drispac mud from 615 m to 2115 m. From 2115 m to TD the well was drilled with KCl/Drispac mud, converted to a fully dispersed gel-lignosulphonate mud in the limestone section.The well encountered hydrocarbon bearing sandstones in the Late Jurassic Ula Formation with a gross sand interval of 86 m between 4155 and 4241 m. An oil water contact has been estimated to be at 4201 m (from logs). RFT pressure measurements and sampling were performed over the sandstone interval. Below 4202 m, however, no formation pressures were obtained due to seal problems caused by bad hole. Thus a contact based on formation pressure data could not be obtained. The Ula Formation rests unconformably on the Triassic at 4241 m. In the Triassic, thin stringers of sandstones were encountered with a total net sand of 2.25 m and an average porosity of 18%. These sandstones were 100% water saturated. Oil shows were recorded from 3694 m in the Late Cretaceous and down to 4217 m in the Ula Formation. Below 4217 m shows were weak and scattered, and no shows were reported from the Triassic.Five cores were taken in the Ula Formation from 4159 m to 4231 m. Cores 1 - 4 bled hydrocarbons at the surface. Two RFT segregated samples taken at 4193 m and 4188 m recovered only mud filtrate.The well was permanently abandoned on 10 June 1982 as an oil discovery.TestingTwo drill stem tests were performed. DST 1 was taken over the interval 4185 - 4197 m and flowed 470 Sm3/day of 39.2 deg API gravity oil and 118080 Sm3/day of gas. The GOR was measured to 251 Sm3/Sm3 and the gas gravity was 0.876 (air = 1). The second DST over the interval 4165 - 4174 m was abandoned due to the very low permeability and no hydrocarbons were produced to surface. However, calculated flow rates from the flow/unloading of the water cushion indicated 280 STB/day (after 4 hrs 18 minutes) and the oil was found to be of the same type as for DST 1. The maximum temperature during DST 2 was 161 deg C, which was assumed too low. No temperature is available from DST 1. The choke size for both tests was 36/64". -
Borekaks i Sokkeldirektoratet
Borekaks i Sokkeldirektoratet Borekaks tilgjengelig for prøvetaking?YESBorekaks i Sokkeldirektoratet Borekaksprøve, topp dybde [m]Borekaksprøve, bunn dybde [m]190.004478.00 -
Borekjerner i Sokkeldirektoratet
Borekjerner i Sokkeldirektoratet Kjerneprøve nummerKjerneprøve - topp dybdeKjerneprøve - bunn dybdeKjerneprøve dybde - enhet14159.04176.2[m ]24177.14185.8[m ]34185.84194.8[m ]44195.04212.9[m ]54213.04230.7[m ]Borekjerner i Sokkeldirektoratet Total kjerneprøve lengde [m]70.5Borekjerner i Sokkeldirektoratet Kjerner tilgjengelig for prøvetaking?YES -
Kjernebilder
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Palynologiske preparater i Sokkeldirektoratet
Palynologiske preparater i Sokkeldirektoratet Prøve dybdeDybde enhetPrøve typeLaboratorie3896.0[m]SWCRRI3912.0[m]SWCRRI3924.0[m]SWCRRI3934.0[m]SWCRRI3939.0[m]SWCRRI3956.0[m]SWCRRI3959.0[m]SWCRRI4159.2[m]CRRI4159.5[m]CRRI4163.9[m]CRRI4171.4[m]CRRI4172.6[m]CRRI4173.4[m]CRRI4174.8[m]CRRI4175.5[m]CRRI4176.2[m]CRRI4178.9[m]CRRI4180.7[m]CRRI4184.5[m]CRRI4185.8[m]CRRI4188.2[m]CRRI4192.6[m]CRRI4212.4[m]CRRI4221.2[m]CRRI4223.6[m]CRRI4228.8[m]CRRI4423.0[m]SWCRRI4430.0[m]SWCRRI -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet105149730223022305230783104323132313310368338603865392839284024402440574155415542414241 -
Spleisede logger
Spleisede logger Dokument navnDokument formatDokumentstørrelse [MB]pdf0.77 -
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]pdf0.18pdf0.30 -
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk)
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk) Dokument navnDokument formatDokumentstørrelse [MB]pdf11.67pdf3.12 -
Borestrengtester (DST)
Borestrengtester (DST) Test nummerFra dybde MD
[m]Til dybde MD
[m]Reduksjonsventil størrelse
[mm]1.04185419714.32.04165417414.3Borestrengtester (DST) Test nummerEndelig avstengningstrykk
[MPa]Endelig strømningstrykk
[MPa]Bunnhullstrykk
[MPa]Borehullstemperatur
[°C]1.02.0Borestrengtester (DST) Test nummerOlje produksjon
[Sm3/dag]Gass produksjon
[Sm3/dag]Oljetetthet
[g/cm3]Gasstyngde rel. luftGOR
[m3/m3]1.04701180000.8280.8762512.045 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]CBL VDL19803948CST10852090CST31713959CST39594437CST41544437DLL MSFL GR41204337HDT20993959HDT39484440HRT15002065ISF LSS GR1783959ISF LSS GR39474475ISF MSFL LSS GR39474201LDT CNL GR20994437LDT GR6032115RFT41764465RFT41930RFT42654300SEISLOOK2004474VSP2004474 -
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 formasjonstestCONDUCTOR30178.036179.00.00LOTSURF.COND.20601.026615.01.74LOTINTERM.13 3/82100.017 1/22115.01.84LOTINTERM.9 5/83944.012 1/43955.02.05LOTLINER74444.08 3/84478.00.00LOT -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling3101.083.011.0WATER BASED06.06.19826151.156.020.0WATER BASED06.06.198213751.4619.028.0WATER BASED06.06.198217661.5721.013.0WATER BASED06.06.198219711.6231.018.0WATER BASED06.06.198221151.6226.015.0WATER BASED06.06.198227711.6526.015.5WATER BASED06.06.198232281.5414.014.0WATER BASED06.06.198235101.6115.010.0WATER BASED06.06.198239041.6118.012.0WATER BASED06.06.198240391.7022.05.0WATER BASED06.06.198243341.8017.06.0WATER BASED06.06.198244781.8118.08.0WATER BASED06.06.1982 -
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