How a venting feature offshore Equatorial Guinea led to a discovery ///
Hydrocarbon venting and seepage features are associated with producing fields in Equatorial Guinea, including Zafiro and Alba fields. The 2000 discovery drilled by CMS Oil and Gas and partners in Equatorial Guinea, the Estrella-1, offsets a gas chimney and seafloor-venting feature. The seafloor expression of this vent feature is a crater 400 m wide and 17 m deep. A mound 6.5 m high is present on the northeast side of the crater, and a broader low-relief mound of ejected material 1.5 m high extends over 1.5 km to the southwest and beyond the survey area. Pinger records show hydrocarbons within the water column rising from several streams within the crater.
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