Successful Exploration of a large-scaleSandstone Injection Complex, Block 24/9,Norwegian North Sea

摘要

Exploration well 24/9-7 was drilled by Marathon Oil and its co-venturers on Norwegianlicence PL 150 during the first quarter of 2004. The well targeted a series of distinctseismic amplitude anomalies, markedly discordant to the general structural trend.These anomalies had been interpreted as a large-scale sandstone injection complex.Seismic modeling indicated that the best explanation for the bright amplitudes observedwas that they were generated by oil-filled, highly porous intrusive sandstone dykes andsills. The data collected from well 24/9-7 (and three subsequent sidetracks) proved thismodel to be essentially correct. The drilling of the Hamsun prospect resulted in asignificant oil discovery with an associated gas cap.