FTSE100 closed the trading week around 13 up at 6,571.
US jobs data that showed the number of positions created last month was much lower than had been forecast failed to dent sentiment in London, which rose for the third day in a row.
Meanwhile, FTSE AIM 100 was also postive - up over 25 points, at 3,933.
Shares rose 20% after the company repeated its comments from January that it had 180 drillable wells with blue chip customers in China and India confirmed for 2014 with an estimated total value of US$97mln.
IOG says it continues to support ATP as the operator of the Skipper and Blythe projects.
Previously the AIM quoted firm had considered taking operational control, to try and drill the Skipper well in the summer’s ‘good weather window’.
It now believes a change of operator won’t be necessary.
A general feeling that Argentina is set to come in from the cold as an investment destination was given further impetus by a major breakthrough in the Vaca Muerta shale by Andes Energia (LON:AEN). Its shares surged over 18% on Friday.
This was following a decision by The International Chamber of Commerce to make the International Rugby Board (IRB) the sole applicant for the top level domain .RUGBY; TLDH and Roar Domains LLC are the IRB's joint venture partners for the .RUGBY domain.
The company has received a large number of proposals from operators - including Devon Energy, Newfield and Chesapeake - to drill high density or infill wells.
It has now decided to participate in nine such wells since the start of January, and applications for twelve more have been filed as well.
Magnolia also said it would have an above average - about 3% - involvement in these wells.