South Texas region draws third big investment in a weekNEW YORK (MarketWatch) — China National Offshore Oil Corp. and Norway’s Statoil ASA announced separate deals, both valued at more than $2 billion, to develop the Eagle Ford shale in south Texas. Statoil said Monday it would team up with Canada-based Talisman Energy Inc. to buy acreage in the Eagle Ford shale. Statoil and Talisman formed a joint venture to purchase assets from Enduring Resources LLC for $1.33 billion. Statoil will also pay $180 million for additional acreage. Statoil’s share of the two transactions will cost $843 million. Late Sunday, Cnooc...