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    "wlbNpdidWellbore" : 305,
    "wlbName" : "9/4-4",
    "wlbHistory" : "\r\n\r\n\u003cp\u003e\u003cb\u003eGeneral\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWell 9/4-4 is located east of the\r\nFlekkefjord High on the western flank of the Egersund Sub-basin, which forms a\r\npart of the Danish-Norwegian Basin. The main objective of drilling 9/4-4 was to\r\ntest the middle Jurassic sands on the western flank of the Egersund sub-basin.\r\nAlternating porous and nonporous sands of Late Triassic and possible minor Late\r\nJurassic sands were considered secondary objectives.\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 9/4-4 was spudded with the\r\nsemi-submersible installation Deepsea Saga on 19 July 1977 and drilled to TD at\r\n2902 m, 57 m into the Triassic Skagerrak Formation. No significant problems\r\nwere encountered in the drilling operations. The well was drilled with\r\nhigh-viscosity spud mud down to 405 m, with gypsum mud from 405 m to 1300 m,\r\nand with lignosulphonate mud from 1300 m to TD. At 2807 m the pipe stuck and\r\nwas freed by adding "Pipefree" and diesel to the mud.\u003c/p\u003e\r\n\r\n\u003cp\u003eThe Middle Jurassic sands with a gross\r\nthickness of 117 m were found as postulated. Secondary objective reservoir\r\nsands in Late Triassic and Late Jurassic were not encountered. No oil shows\r\nwere encountered in any section of the well and no hydrocarbons could be\r\ninferred from logs. The most likely reason for the lack of hydrocarbons is\r\nimmaturity of the Jurassic source beds. Organic geochemical source rock\r\nscreening of the interval 250 m to TD showed good to excellent source rocks in\r\nthe Late Jurassic shales and the Middle Jurassic (Bryne Formation) coals. The\r\nanalyses showed that the Bryne coals were immature for petroleum generation and\r\nthat the Late Jurassic shales were immature, possibly marginally mature. No\r\nconventional core was cut and no fluid samples taken. Fourteen sidewall cores\r\nwere recovered from the interval 2673 m to 2850 m.\u003c/p\u003e\r\n\r\n\u003cp\u003eThe well was permanently abandoned on 20\r\nAugust 1977 as a dry hole.\u003c/p\u003e\r\n\r\n\u003cp\u003e\u003cb\u003eTesting\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eNo drill stem test was performed.\u003c/p\u003e\r\n\r\n\r\n",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
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