At Hart Energy's recent DUG Bakken conference, Gibson Scott, a director at ITG Investment Research, discussed how the firm has seen certain completions methods work better in core rock, rather than noncore, in the Williston Basin, Eagle Ford, Permian Basin and D-J Basin. Proppant-intensive wells, and the types of fluids used, stand out above coiled tubing-conveyed fracks and other methods including plug and perf or sliding sleeve, as step changes in completions, he said.