The Denver company’s sale in the Permian Basin could be followed by a deal for the Denton Field in Lea County, N.M., to chip away at $785 million debt.

Small-, mid- and large-cap players continue investment in the shale play as E&Ps see dynamic wells and healthy returns in the Midcontinent despite a sour commodity environment.

Interest in North Carolina's Triassic Basin shale deposits has grown in recent years, but the region’s resources remain largely undiscovered.