Denver’s SM Energy Co. on Monday said it has finalized a $500 deal to sell the majority of its assets in Wyoming’s Powder River Basin to a new Denver company run by an industry veteran. SM said it will use the money to pay down debt and other general purposes. The deal was previously announced in January. SM sold about 112,200 contiguous acres of mineral rights in Wyoming, about 80 percent of the company's position in the Powder River Basin.