1/9-3
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General information
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Wellbore history
GeneralWell 1/9-3 is located in the Feda Graben, close to the UK border southwest in the Norwegian North Sea. The primary objective of the well was to evaluate the Jurassic sandstones. The secondary objective was to appraise and test the hydrocarbon bearing zones of Danian and Maastrichtian age (Shetland Group) encountered in 1/9-1. The well was drilled in two phases, of which Phase I is well bore 1/9-3 and Phase II is well bore 1/9-3 R. This procedure was a requirement from the Norwegian Petroleum Directorate since Dyvi Gamma came directly from the yard and had therefore not accumulated the experience needed to drill the high pressure Jurassic well to a planned TD of 5000 m. Phase II was to be drilled with the rig Dyvi Beta.Operations and resultsWildcat well was spudded with the semi-submersible installation Dyvi Gamma on 13 August 1977 and drilled to TD at 27871 m in the Hordaland Group. The progress of the drilling was very much delayed due to technical problems on Dyvi Gamma. As a result, also hole problems were increased due to very long exposure in open hole condition. Due to these problems the well bore was terminated after setting the 13 3/8" casing instead of the plan, which was to drill down to the 9 5/8" casing point. The well was drilled with seawater and gel all through.Several thin sand beds were penetrated in the Hordaland Group between 1610 m and 1737 m. Oil shows were recorded in the uppermost of these, from 1610 m to 1625 m.No cores were cut and no wire line fluid samples taken in the well bore.The well was suspended as dry on 27 November 1977.TestingNo drill stem test was performed -
Cuttings at the Norwegian Offshore Directorate
Cuttings at the Norwegian Offshore Directorate Cuttings available for sampling?YESCuttings at the Norwegian Offshore Directorate Cutting sample, top depth [m]Cutting samples, bottom depth [m]170.004569.00 -
Palynological slides at the Norwegian Offshore Directorate
Palynological slides at the Norwegian Offshore Directorate Sample depthDepth unitSample typeLaboratory4200.0[m]DCOD4209.0[m]DCOD4218.0[m]DCOD4230.0[m]DCOD4239.0[m]DCOD4248.0[m]DCOD4260.0[m]DCOD4269.0[m]DCOD -
Oil samples at the Norwegian Offshore Directorate
Oil samples at the Norwegian Offshore Directorate Test typeBottle numberTop depth
MD [m]Bottom depth
MD [m]Fluid typeTest timeSamples availableDSTTEST33126.003125.0014.09.1978 - 00:00YESDSTTEST43094.003112.0019.09.1978 - 02:25YES -
Lithostratigraphy
Lithostratigraphy Top depth [mMD RKB]Lithostrat. unit11111501617163416641683 -
Documents – reported by the production licence (period for duty of secrecy expired)
Documents – reported by the production licence (period for duty of secrecy expired) Document nameDocument formatDocument size [MB]pdf29.25pdf4.22pdf8.04pdf4.64pdf0.81pdf3.03pdf10.99pdf8.34pdf2.78pdf3.34pdf6.96pdf2.60pdf1.20pdf0.64pdf1.12pdf0.14pdf0.51pdf0.64pdf3.17pdf1.58pdf7.06pdf0.54pdf4.22pdf2.55pdf1.02pdf3.34pdf2.84pdf12.25pdf0.01pdf4.31pdf0.85pdf0.36pdf5.86pdf3.55 -
Drill stem tests (DST)
Drill stem tests (DST) Test numberFrom depth MD
[m]To depth MD
[m]Choke size
[mm]1.03205321419.02.0315731809.53.0312631250.04.03094311219.0Drill stem tests (DST) Test numberFinal shut-in pressure
[MPa]Final flow pressure
[MPa]Bottom hole pressure
[MPa]Downhole temperature
[°C]1.02.03.04.0120Drill stem tests (DST) Test numberOil
[Sm3/day]Gas
[Sm3/day]Oil density
[g/cm3]Gas grav. rel.airGOR
[m3/m3]1.02.0848000.8403.04.03976484000.770 -
Logs
Logs Log typeLog top depth [m]Log bottom depth [m]AC CBL2203822AC CBL2801454AC CBL3001345AC CBL12002760BHC AC38224559CDL CNL GR CAL27304209CDL GR CAL3942771CDL GR CAL38224563CNL GR4251350CNL GR38234562DIP38204564DLL30623350FDL30503350IEL BHC AC GR SP1644209IEL GR SP38224561 -
Casing and leak–off tests
Casing and leak–off tests Casing typeCasing diam.
[inch]Casing depth
[m]Hole diam.
[inch]Hole depth
[m]LOT/FIT mud eqv.
[g/cm3]Formation test typeCONDUCTOR36163.044170.00.00LOTSURF.COND.20434.026445.00.00LOTINTERM.161345.019 1/21360.00.00LOTINTERM.13 3/82761.017 1/22782.00.00LOT -
Drilling mud
Drilling mud Depth MD [m]Mud weight [g/cm3]Visc. [mPa.s]Yield point [Pa]Mud typeDate measured1691.04120.0spud mud4451.0753.0spud mud6211.3748.0gel mud9791.3748.0gel mud13131.4148.0gel mud15291.7457.0gel mud22511.8953.0gel mud24481.8552.0gel mud27731.8556.0gel mud