7220/6-2
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General information
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Wellbore history
Wellbore historyGeneralWell 7220/6-2 was drilled to test the Neiden prospect on the western side of the Loppa High in the Barents Sea. The well is located ca 4 km north-northwest of the Obelix well 7220/6-1, which had shows and traces of live oil in the Permian Ørn Formation. The primary objectives were to test the reservoir properties and hydrocarbon potential in sandstones within the Triassic Snadd Formation and in the carbonates of the Ørn Formation.Operations and resultsWildcat well 7220/6-2 was spudded with the semi-submersible installation Island Innovator on 1 October 2015 and drilled to TD at 985 m in Middle Triassic sediments in the Snadd Formation. Operations proceeded with 23% of total time recorded as downtime. Most of the downtime was related to losses in the Snadd Formation. After completing the drilling and data acquisition program, a 7" liner was installed and the well was temporarily plugged and abandoned due to rig classification in the Barents Sea for the prevailing winter. The well was drilled with seawater and hi-vis pills down to 537 m, and with Aquadrill mud from 537 m to TD.The well encountered the prognosed intra Snadd sandstones at 634 m. The sandstones form part of a heterolithic siliciclastic unit with 181.5 m TVD gross thickness. These sandstone stringers and interbeds were water wet (density 1.082 g/cc) but had traces of gas and minor oil shows in the cuttings.One core was cut from 835 m to 861.4 m with 100% recovery. The core was mostly siltstone with sandstone and claystone beds. MDT water samples were taken at 616.9 m and 789.2 m.The well was suspended on 4 November 2015 as a dry well with shows.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]510.00985.00 -
Cores at the Norwegian Offshore Directorate
Cores at the Norwegian Offshore Directorate Core sample numberCore sample - top depthCore sample - bottom depthCore sample depth - uom1840.0866.4[m ]Cores at the Norwegian Offshore Directorate Total core sample length [m]26.4Cores 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 typeCONDUCTOR30478.036478.00.00SURF.COND.13 3/8494.826497.01.26FITPILOT HOLE497.09 7/8497.00.00LINER9 5/8605.212 1/4606.01.44FITLINER7978.08 1/2979.01.40FIT -
Logs
Logs Log typeLog top depth [m]Log bottom depth [m]FMI MSIP566811FMI MSIP610966HRLA PEX ECS HNGS562811HRLA PEX ECS HNGS745958MDT639789MWD - GR PWD RES DIR AC417502MWD - PWD DIR417488MWD - RES GR PWD DIR877985MWD - RES GR PWD DIR DEN NEU AC502877MWD - RES GR PWDDIR985985USIT DCBL VDL GR438567USIT DCBL VDL GR533945XL ROCK621649 -
Lithostratigraphy
Lithostratigraphy Top depth [mMD RKB]Lithostrat. unit417417481481510510 -
Drilling mud
Drilling mud Depth MD [m]Mud weight [g/cm3]Visc. [mPa.s]Yield point [Pa]Mud typeDate measured4171.5019.0Water Based4171.041.0Water Based5021.041.0Water Based5021.5019.0Water Based5171.2011.0Water based6111.2512.0Water Based6111.2012.0Water Based7611.2112.0Water Based7611.2511.0Water Based8121.2112.0Water Based8761.1812.0Water Based8761.2113.0Water Based8821.1711.0Water Based9851.131.0Brine9851.1711.0Water Based