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  "LayerName" : "Wellbore - History",
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    "wlbName" : "9/10-1",
    "wlbHistory" : "\r\n\u003cp\u003e\u003cb\u003eGeneral\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWell 9/10-1 is located in the Åsta Graben\r\nof the Danish Norwegian Basin in the North Sea. The location was selected to\r\nexplore the northeast regional limit of Oligocene sands at a non-structural\r\nsite and to reach the Danian very low on the South flank of the seismic\r\n"L" structure. The main objectives were the first and second\r\nOligocene sands, which were gas bearing in the 2/3-1 well. The location, in\r\naddition, tested for presence of the Danian section, which had proved to be oil\r\nbearing in the Phillips Ekofisk area approximately 40 miles to the Southwest.\r\nThere was also a possibility of the development of gas bearing zones within the\r\nMiocene section.\u003c/p\u003e\r\n\r\n\u003cp\u003e\u003cb\u003eOperations and results\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWildcat well 9/10-1 was spudded with the\r\njack-up installation Gulftide on 30 August 1970 and drilled to TD at 2205 m in\r\nthe Late Cretaceous Tor Formation. A 38" hole was drilled to 143 m with\r\nseawater. After spotting a gel slurry, 36" drive pipe was set at 123 m.\r\nDrilling was continued with a 26" bit to 221 m using seawater where lost\r\ncirculation became excessive. Attempts with a 50-barrel LCM slurry and a\r\n300-sack cement plug were unsuccessful in sealing off the thief zone. The\r\ndrilling was continued "blind" to 251 m where a 450-sack gel slurry\r\nwas spotted and 20" casing run to 248 m and cemented. After installing\r\n20" BOP, 17 1/2" hole was drilled to 953 m using a 10.7 lb gel mud.\r\nThree attempts were made to log this surface section but hole bridging\r\nconditions occurring at 279 m and 457 m would not permit deeper penetration.\r\nWent into the hole with the bit, tagged bottom, and then drilled 5 m with no\r\nobstruction. The hole was conditioned and logged from 457 m to 88 m. Rigged up\r\nBHA and went to bottom with the bit, cleaned out to 957 m, and drilled an\r\nadditional 6 m. The 13 3/8'' casing was then run and set with no problems to a\r\ndepth of 960 m. Drilling continued with a 12 1/4" bit from under the 13\r\n3/8'' ca",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
  }
}