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    "wlbName" : "31/2-2",
    "wlbHistory" : "\r\n\r\n\u003cp\u003e\u003cb\u003eGeneral\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWell 31/2-2 was drilled some 4 km east of\r\nthe discovery well 31/2-1 on seismic line 79-416 at SP 200. The concession\r\nrequirement for the wells were complete penetration of the prospective Jurassic\r\nsequence and terminate in Triassic or older. The particular objectives of well\r\n31/2-2 were: to evaluate lateral variation of reservoir parameters eastwards on\r\nthe flank of the structure: to test the zone of oil shows seen in 31/2-1 in\r\nbetter reservoir conditions, to test the gas accumulation in a down-dip\r\nlocation: to evaluate the nature of the seismic flatspot, and to provide\r\ngeological calibration of seismic reflectors above the reservoir for improved\r\nregional evaluation.\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 was spudded with the\r\nsemi-submersible installation West Venture on 27 February 1980 and drilled to\r\nTD at 1857 m in the Middle Jurassic Krossfjord Formation. The 36" hole was\r\ndrilled without incident to 433 m using seawater with viscous pills spotted on\r\nconnections. From 422 m to 433 m hard drilling was experienced. This was\r\ninterpreted as a boulder bed similar to that found at a comparable depth in the\r\nprevious 31/2-1 well. Problems were encountered with the stability of the\r\ntemporary guide base, and the well had to be abandoned. The rig was moved NE 25\r\nm and re-spudded on 29 February. The well was drilled with seawater and hi-vis\r\npills down to 800 m, and with gypsum/lignosulphonate mud from 800 m to TD. \u003c/p\u003e\r\n\r\n\u003cp\u003eTop reservoir (Sognefjord Formation) came\r\nin at 1544 m and was gas bearing down to a gas/oil contact at 1579 m, and\r\noil-bearing from 1579 m down to an oil/water contact at 1591 m. Both contacts\r\nwere clearly defined on logs, the gas/oil contact was confirmed by RFT pressure\r\ngradients, and moveable oil was confirmed by RFT sampling at 1587.5 m and 1590\r\nm. Gas samples were obtained from 1548 m and 1571 m. Weak oil shows began at\r\n1561 m in the gas zone, strong shows with stained and bleeding cores and a\r\nparaffinic smell were obs",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
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