7130/4-1
Export: PDF
-
General information
-
Wellbore history
GeneralWell 7130/4-1 was drilled to test the Ørnen prospect on the Finmark Platform in the Barents Sea. The primary objective was to test the hydrocarbon potential of the Late Permian age Røye Formation spiculites. Secondary objective was to test the Ørn Formation carbonates. In a discovery case, the well had an option to target the deeper sandstones of the Carboniferous Soldogg Formation.Operations and resultsWildcat well 7130/4-1 was spudded with the semi-submersible installation Transocean Arctic on 22 November 2015 and drilled to TD at 3184 m in the Early Carboniferous Soldogg Formation. A 9 7/8" pilot hole was drilled from 382 to 588 m to look for shallow gas. No shallow gas or water flow was encountered. No significant problem was encountered in the operations. The well was drilled with seawater and hi-vis pills down to 588 m and with GEM/KCl mud from 588 m to TD.The main target consisting of Late Permian Røye Formation spiculites and carbonates was encountered at 2055 m. The spiculite reservoir extended from 2055 to 2093.5 m, with a reservoir quality poorer than expected. Sampling registered only water with no indications of movable hydrocarbons. Only mineral fluorescence was reported at the wellsite. Further analysis of the core in the laboratory revealed traces of oil stain, bleeding oil, hydrocarbon odour and bright yellowish white direct fluorescence associated with fracturing and permeable laminae in the uppermost part of the 'Røye I' interval.The secondary target, Permo-Carboniferous carbonates of the Bjarmeland Group, was encountered at 2231 m. The carbonates had minor hydrocarbon shows and poor reservoir characteristics. Subsequently, the well was deepened into the third target, the Lower Carboniferous sandstones of the Soldogg Formation, encountering moderate to good sands with a 5-metre gas column from 3029 to 3034 m.Two cores were cut from 2045 m above the spiculite interval to 2096.5 m thus capturing the whole Røye spiculite interval. The core recovery was 100%. MDT fluid samples were taken at 2055.9 m (water), 3031.6 m (gas), and 3081.2 m (water).The well was permanently abandoned on 8 January 2016 as a gas discovery.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]600.003184.00 -
Cores at the Norwegian Offshore Directorate
Cores at the Norwegian Offshore Directorate Core sample numberCore sample - top depthCore sample - bottom depthCore sample depth - uom12045.02070.3[m ]22070.32096.4[m ]Cores at the Norwegian Offshore Directorate Total core sample length [m]51.4Cores at the Norwegian Offshore Directorate Cores available for sampling?YES -
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 typeCONDUCTOR30378.036582.60.00SURF.COND.20583.526588.01.79LOTPILOT HOLE588.09 7/8588.00.00INTERM.13 3/81798.717 1/21806.01.76LOTOPEN HOLE3184.08 1/23184.00.00 -
Logs
Logs Log typeLog top depth [m]Log bottom depth [m]CN ZDL ORIT XMAC RTEX MLL17663175GR GW VSP6883148MAXCORE GR18843143MDT GR18993146MWD - OTK BCPM SDTK356586MWD - OTKII BCPM309370MWD - OTKII BCPM SDTK LTK GR ABR17393184MWD - OTKII BCPM SDTK NBGR5471804XLR GR18842766 -
Lithostratigraphy
Lithostratigraphy Top depth [mMD RKB]Lithostrat. unit3123353355615756016056056126266636907277477547541302189520552055223122312320232024962680268027812996 -
Drilling mud
Drilling mud Depth MD [m]Mud weight [g/cm3]Visc. [mPa.s]Yield point [Pa]Mud typeDate measured01.4028.0Water Based3821.4028.0Water Based6271.2014.0Water Based10491.2014.0Water based16001.2027.0Water Based19501.2027.0Water Based25101.1526.0Water Based30061.1622.0Water Based31841.1725.0Water Based