French energy major Total said it will invest more than $700 million in the Houston company Tellurian and its Driftwood liquefied natural gas export project in Louisiana. The deal, which includes the additional purchase of more LNG by Total, increases Total's already sizable interest in Tellurian and the roughly $30 billion LNG export and gas pipelines project. The investment boosts Total's stake in Tellurian to about 25 percent. Total also is a major investor in the Cameron LNG project in Louisiana.