Shell has done a complete u-turn on investing in VM shale and is now going for it due to Argentine government incentives.

http://www.bloomberg.com/news/2013-12-10/shell-to-triple-argentine-shale-spending-as-winds-change.html

"Shell expanded into shale exploration. It has four wells in production at Vaca Muerta, is drilling two more and is analyzing opportunities to increase its shale acreage, he said."

Lets hope CWV can get multiple wells drilled in the mean time though.

http://www.proactiveinvestors.com/companies/news/50595/madalena-energy-to-benefit-from-increased-vaca-muerta-investment-from-shell-50595.html

http://www.buenosairesherald.com/article/148696/vaca-muerta-changes-landscape

Regards,
Ed.