document: On 11 September 2018, Cairn Energy reported that it negotiated an option to acquire a 30% working interest from Total in block C-7, deep waters of the Senegal (M S G B C) Basin, northern offshore Mauritania, following the evaluation of the recently acquired 3D seismic. The target on the block is the Cretaceous turbidite fan play. Cairn can exercise its option upon a well decision based on the current seismic evaluation. The well could be drilled in 2021.  In June 2018, Total completed a 3D seismic survey on blocks C-7 and C-18. The survey was acquired with CGGâs Oceanic Sirius seismic vessel, it covered 13,180 sq km in the southern parts of blocks C-7 and C-18.  In May 2017, Total was awarded block C-7. Currently participants in the acreage are Total, operator, with 90% and state company SMHPM with 10%.  The block covers 7,300 sq km, it is located north of Totalâs block C-9 and BP/Kosmos C-6 and C-12. BP/Kosmos found hydrocarbon shows in the Lamantin 1 wildcat in blocks C-6 / C-12, just south of the block C-7 border, in December 2017. In July 2015 Dana Petroleum, the former operator of the C-7 block, was still in talks with the Mauritania authorities on a validity extension of its block C-7. The Mauritanian authorities who were also open for third party offers on the block eventually selected Totalâs offer.  The C-7 block contains four hydrocarbon discoveries: Pelican, Aigrette, Cormoran and Fregate.  Dana Petroleum made a gas and condensate discovery with new-field wildcat Pelican 1 in 2004. Dana estimates that the well has discovered about 1 Tcf of gas in-place, with 'technically' recoverable reserves in the range of 600 to 800 Bcf together with 10-13 MMb of associated liquids. As the base of the hydrocarbon-bearing interval was not encountered in the well, these figures could be revised upwards. The Pelican 1 well is located offshore in 1,700 m of water about 150 km north of the Chinguetti field. It reached a TD of 3,825 m.   On 7 December 2006, Dana abandoned wildcat Aigrette 1 as an oil discovery. The discovery is considered by the company as being non-commercial. The well found oil in the targeted Cretaceous sandstones. An about 20 m (gross) oil column has been identified from pressure testing and fluid sampling. A sample recovered from this interval has confirmed the presence of oil.   Dana advised on 10 January 2011 that it has discovered gas with new-field wildcat Cormoran. Four separate gas columns have been encountered in the well, two adjoining the Pelican discovery, one within the deeper Cormoran prospect and one at the base of the well (Petronia prospect). Stabilised flow rates of 22-24 MMcfg/d were obtained on a 32/64ââ choke over the interval 3,679-3,712 m in the Lower Pelican sands of the Senonian Series. Operator Dana considers that higher rates could have been obtained from the DST had flow not been constrained by sand production.  In early February 2014, Dana Petroleum, was reported to have encountered up to 30 m of net gas & condensate and oil pay in multiple Cretaceous sands in the Fregate 1 wildcat. The well encountered gas, condensate and oil pay in good quality multiple sands in the Petronia main target (Santonian to Coniacian) and in the Lower Cormoran (Santonian) target. However, the previously considered as promising deeper turbidite Fregate main target in the Turonian series, contained only non-commercial hydrocarbon shows. The well was plugged and abandoned at TD of 5,426 m. Tullow, Danaâs partner, said this wildcat has achieved an important technical breakthrough by establishing a new oil play in deepwater Late Cretaceous turbidites.
summary:  Cairn Energy reported that it negotiated an option to acquire a 30% working interest from Total in block C-7, deep waters of the Senegal (M S G B C) Basin, northern offshore Mauritania, following the evaluation of the recently acquired 3D seismic. The target on the block is the Cretaceous turbidite fan play.