{
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  "LayerId" : 254,
  "LayerName" : "Wellbore - History",
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    "wlbNpdidWellbore" : 255,
    "wlbName" : "2/4-11",
    "wlbHistory" : "\u003cp\u003e\u003cb\u003eGeneral\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWildcat well 2/4-11 should evaluate the\r\nsouthern part of a northwest-southeast trending seismic high about 3.2 km long\r\nand 2.4 km wide. The well was drilled just south of the boundary between blocks\r\n2/1 and 2/4 about two km southeast of the 2/1-1 well. The objective formations\r\nwere the Danian-Late Cretaceous limestone in addition to sandstones of the\r\nJurassic, which had gas and condensate shows in the 2/1-1 well. Top Paleocene\r\nwas anticipated at 2972 m (9750 ft), top Danian at 3078 m (10100 ft), top Late\r\nCretaceous at 3277 m (10750 ft), and top Jurassic at 3962 m (13000 ft). Planned\r\nTD was at 4267 m (14000 ft).\u003c/p\u003e\r\n\r\n\u003cp\u003e\u003cb\u003eOperations and results\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWell 2/4-11 was spudded with the jack-up\r\ninstallation Zapata Explorer on 25 December 1973 and drilled to TD at 4281 m in\r\nthe Late Permian Zechstein Group. Running 7" casing at 3838 m, the casing\r\ncould not get passed 3019 m. Pulling out of hole the casing stuck when 20\r\nstands were left. Eleven days were spent working on the fish before it came loose.\r\nThe hole was reamed and casing was set. Maximum hole deviation down to a depth\r\nof 2757 m was 4.75 deg, at 149 m. The well was drilled with spud mud (Seawater\r\ngel and Flosal) down to 321 m, with Shale Trol mud from 321 m to 2265 m, and\r\nwith a Lignosulphonate mud (Unical and Ligcon) from 2265 m to TD. Below 792 m\r\none to four percent diesel was added to the mud.\u003c/p\u003e\r\n\r\n\u003cp\u003eTop Paleocene was found at 2936 m, top\r\nDanian limestone at 3146 m, top Late Cretaceous limestone at 3268 m, top Early\r\nCretaceous was found at 3782 m, top Late Jurassic (Kimmeridgian) at 3968 m, and\r\ntop of the Permian was encountered at 4211 m. Sub-commercial amounts of oil was\r\ntested from the Danian and even smaller amounts from the Late Cretaceous. The\r\nJurassic section penetrated consisted of shale, claystone, and siltstone and\r\ncontained no reservoir rocks.\u003c/p\u003e\r\n\r\n\u003cp\u003eSource rock analyses of sidewall cores\r\nfrom the Jurassic showed TOC in the range 0.6 - 2% and vitrinite reflection\r\nfrom 0.78",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
  }
}