2/11-12 S
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Generell informasjon
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Brønnhistorie
GeneralWell 2/11-12 S “West Hod Appraisal” was drilled as part of the Hod Field Development Project (HFD). The well is located on the Skrubbe Fault between the Lindesnes Ridge and the Ål Basin in the North Sea. The primary objective for appraisal well 2/11-12 S was to delineate the western part of the Hod field. The secondary objective was to examine reservoir rocks (diatomites) in the Miocene in the Hordaland group (Lark Formation).Operations and resultsA 9 7/8” Pilot hole was drilled to 540 m. No shallow gas or water flow was observed.Appraisal well 2/11-12 S was spudded with the jack-up installation Mærsk Interceptor on 10 January 2019 and drilled to TD at 2956 m (2939 m TVD) m in the Late Cretaceous Hidra Formation. An abrupt mud loss at 2731 m MD in the lower Balder Formation was observed, with initial mud loss rate at 23 m3/hr. This mud loss was observed to rapidly diminish by 2750 m MD upon further drilling into the underlying Sele Formation. A fault is possible in this interval. The well was drilled with seawater and hi-vis pills down to 541 m and with oil-based mud from 540 m to TD.In the primary target in the Hod formation, a limestone interval of about 120 meters with poor reservoir properties was encountered. There were traces of oil in the limestone rocks. Good shows wear recorded in the interval 2841 to 2859 (stain, direct fluorescence, cut fluorescence, and ring fluorescence), and in the intervals 2907 to 2916 m and 2937 to 2943 m (no stain, direct fluorescence, cut fluorescence, no residual ring)In the secondary target in the Hordaland group, 200 metres of reservoir rocks with poor reservoir properties and traces of oil were encountered. Good shows were recorded in the intervals 1554 to 1560 m and 1617 to 1647 m (strong petroleum smell, no stain, direct fluorescence, cut fluorescence and ring fluorescence).The Miocene target was cored in 5 cores from 1485 m to 1674.3 m. The Chalk target was not cored. MDT fluid samples were taken in the Miocene at 1538 m (oil), and in the chalk at 2838 m (water with 5 cm3 oil), 2840.6 m (oil with 10 cm3 water) and 2846.8 m (oil with 10 cm3 water). Analyses of the samples from the chalk showed mud contamination between 40% and 75% in the oil fractions.The well was permanently abandoned on 12 February 2019 as a well with shows.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]550.002955.00 -
Borekjerner i Sokkeldirektoratet
Borekjerner i Sokkeldirektoratet Kjerneprøve nummerKjerneprøve - topp dybdeKjerneprøve - bunn dybdeKjerneprøve dybde - enhet11485.01515.7[m ]21518.51551.5[m ]31551.61609.2[m ]41610.51647.2[m ]51653.51674.0[m ]Borekjerner i Sokkeldirektoratet Total kjerneprøve lengde [m]178.3Borekjerner 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 formasjonstestCONDUCTOR20535.826541.01.63LOTPILOT HOLE540.09 7/8540.00.00INTERM.13 3/81426.4161435.01.95LOTOPEN HOLE2955.78 1/22955.70.00 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]FTNG15271683FTNG15382846HNGS PEX MSIP QG ZAIT14261773LWD - ECD RES GR14351485LWD - GR ECD RES NØ DEN SON14852955LWD - GR ECD RES SON5411435LWD - GR RES ECD SON125540MDT MF14351774UIB GPIT PPC GR14902945XLR SWC27232943XPT ADT MRX NEXT14261773XPT ADT NEXT MRX14262996ZAIT NGI MSIP PEX HNGS14262996 -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet1261261508150820622721272127352777283028372842284229452946 -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling11.05Bentonite11.02Sea water in well.11.3120.0Glydril WBM/ Displacementmud.5421.3929.0RheGuard Prime10471.4131.0RheGuard Prime12821.5134.0RheGuard Prime13661.7343.0RheGuard Prime14351.5736.0RheGuard Prime14371.6935.0RheGuard Prime14851.7337.0RheGuard Prime24551.7539.0RheGuard Prime26301.7336.0RheGuard Prime27681.7537.0RheGuard Prime28791.7338.0RheGuard Prime29551.7538.0RheGuard Prime