{
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  "LayerId" : 254,
  "LayerName" : "Wellbore - History",
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    "wlbNpdidWellbore" : 254,
    "wlbName" : "2/4-10",
    "wlbHistory" : "\u003cp\u003e\u003cb\u003eGeneral\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWildcat well 2/4-10 was drilled on an\r\nanticlinal structure, 4.8 km long and 2.4 km wide, lying approximately 8 km\r\nnorthwest of the centre of the Tor Field. The Danian limestone was the expected\r\npay zone, and if porosity was present, the Late Cretaceous Limestone could also\r\nbe hydrocarbon bearing. Prognosed top Danian was at 3139 m (10300 ft) with\r\nplanned TD at 3414 m (11200 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 2/4-10 was spudded with the jack-up\r\nrig Zapata Explorer on 13 October 1973 and drilled to TD at 3418 m in the Late\r\nCretaceous Tor Formation. The well was drilled and tested in 69 days, without\r\nsignificant technical problems. Deviation surveys were carried out down to 2451\r\nm and the maximum deviation to this depth was 2 deg. The well was drilled with\r\nsalt-water gel and Flosal down to 497 m, with Shale Trol from 497 to 2015 m,\r\nwith Unical (chromium-lignosulphonate) from 2015 m to 2819 m, and with Unical\r\nand Ligcon (caustisized lignite) from 2819 m to TD.\u003c/p\u003e\r\n\r\n\u003cp\u003eTop Danian limestone was encountered at\r\n3162 m and top Late Cretaceous limestone at 3293 m. The Danian Limestone tested\r\nonly small amounts of water and no oil, after acidization, on two drill stem\r\ntests. The Late Cretaceous Chalk produced oil, but with a very low GOR, and\r\nwith a high amount of water, which made its commerciality questionable. These\r\nfluid characteristics were furthermore very different from the 2/4-7 fluids\r\n(Tor discovery) and indicated 2/4-10 to be on a separate structure from the Tor\r\nField.\u003c/p\u003e\r\n\r\n\u003cp\u003eNo cores were cut and no wire line fluid\r\nsamples taken.\u003c/p\u003e\r\n\r\n\u003cp\u003eThe well was permanently abandoned on 20\r\nDecember 1973 as an oil discovery\u003c/p\u003e\r\n\r\n\u003cp\u003e\u003cb\u003eTesting\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eSix DST's were conducted: DST 1 and DST 2\r\nin the Late Cretaceous and DST 3 to DST 6 in the Danian limestone. The results\r\ngiven here are after acidization: DST 1 from 3304 - 3322 m flowed 583 Sm3 oil,\r\n275 m3 water, and only 1150 Sm3 gas /day through a 24/64" choke. The oil\r\ngravity was",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
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}