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<br /> <br />2.3. Well Bore Surveys <br />Operators shall conduct deviation and directional surveys on all deviated and horizontal wells: <br />(a) at deviation tests intervals not exceeding 150 metres from the surface casing flange top to the <br />total depth of the well during drilling; <br />(b) that are accurate to ±1 % of the well depth; and <br />(c) submit to the Ministry, the results of the survey and a final cross section plan of the well bore, <br />as described in section 2.2(b), using the actual survey data within thirty days of the well's TD <br />date. <br />7 <br />