16/1-30 A
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Generell informasjon
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Brønnhistorie
Well 16/1-30 A Lille Prinsen Outer Wedge was drilled to appraise the 16/1-29 Lille Prinsen Discovery in the north-western part of the Utsira High in the North Sea. The structure was first tested by wells 16/1-6S and 16/1-6 A, which made the Verdandi Discovery in the Eocene Grid and the Paleocene Heimdal formations. The Lille Prinsen prospect is mapped in several geographically separate segments at Basement to Base Cretaceous level. These segments are: The Permian Main Carbonate Discovery penetrated by 16/1-29 S, the western Outer Wedge segment, and segments 2,3 and 5 (Carbonate upsides). The primary well 16/1-30 S found oil in Intra-Draupne Formation sandstone in the Outer Wedge segment. The objective of 16/1-30 A was to verify lateral reservoir distribution and quality of the Outer Wedge reservoir units.Operations and resultsWildcat well 16/1-30 A is a geological side-track to 16/1-30 S. It was kicked off at 1307.2 m on 2. July 2019 with the semi-submersible installation West Phoenix and drilled to TD at 2075 m (1989 m TVD) m in Basement rock. Operations proceeded without significant problems. The well was drilled with Versatec oil-based mud from kick-off to TD.Well 16/1-30 A encountered Viking Group sandstone and Basement Group granite reservoirs. Some shows were observed on the core chips from the Intra-Heather reservoir. MDT pressure points showed an oil gradient in Intra-Heather Formation sandstone down to 2031 m (1951.2 m TVD). Good shows with fluorescence odour and stain were recorded from top Intra-Heather Formation sandstone down to ca 2030 m. The log responses in Basement indicate the granite is oil filled at the top and water-bearing below ca 2045 m. However, MDT pressure logging gave no valid pressure points here (tight) and no shows were observed.Two cores were cut. Core 1 was cut from 1993 to 2029 m with 92.3% recovery, capturing Shetland Group claystone and limestone and Intra-Heather Formation reservoir sandstone. The core-log depth shift is 2.3 m. Core 2 was cut from 2030 to 2039.46 m with 72.8% recovery, capturing basal Heather Formation claystone and granitic basement. The core-log depth shift is 4.5 m. MDT fluid samples were taken at 2026.5 m (oil with 6% OBM contamination) in Intra-Heather Formation sandstone.The well was permanently abandoned on 19 July 2019 as an oil appraisal well.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]1310.002066.00 -
Borekjerner i Sokkeldirektoratet
Borekjerner i Sokkeldirektoratet Kjerneprøve nummerKjerneprøve - topp dybdeKjerneprøve - bunn dybdeKjerneprøve dybde - enhet11993.02030.0[m ]22030.02039.5[m ]Borekjerner i Sokkeldirektoratet Total kjerneprøve lengde [m]46.4Borekjerner i Sokkeldirektoratet Kjerner tilgjengelig for prøvetaking?YES -
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 formasjonstestCONDUCTOR36202.042203.00.00SURF.COND.20567.036572.00.00INTERM.13 3/81300.0161301.01.55FITLINER9 5/81977.012 1/41978.01.92LOTOPEN HOLE2075.08 1/22075.00.00 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]AIT PEX HNGS19772065CMR MDT20052056MWD LWD - TELE ARC19782075MWD LWD - XCEED ARC TELE13071978UIB MSIP19772062 -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet1507791005105111431440155018121812187418811980200320082008201120352041 -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling19601.0914.0Versatec20301.0913.0Versatec20751.0914.0Versatec -
Palynologiske preparater i Sokkeldirektoratet
Palynologiske preparater i Sokkeldirektoratet Prøve dybdeDybde enhetPrøve typeLaboratorie2004.0[m]CCGG2019.0[m]CCGG2022.0[m]CCGG2030.0[m]CCGG2036.0[m]CCGG