Tokyo Gas, Japan's largest utility, has expanded its position in the US shale sector by acquiring oil and gas assets in the East Texas/Louisiana region from Royal Dutch Shell subsidiary Castleton Resources. Tokyo Gas has also increased its share of Castleton Resources from 30% to around 46% through a capital injection. Both deals would increase Castleton Resources' net production from 238 million to 343 million cubic feet per day over an area of 222,400 net acres, Tokyo Gas said.
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