Analysts at Wood Mackenzie , Duke Energy and Goehring & Company have said that productivity and growth in the Permian have both slowed in recent years , and warned of a continuing trend . Among the reasons cited for the decline were a dwindling inventory of high - quality drilling locations , frac hits and daughter - daughter well interference . As more wells are drilled and core inventory is exhausted, it becomes increasingly difficult to grow production," he wrote from Denver, where he discussed produced water challenges in the Permian. " They said global oil prices in the coming years could be affected if Permian supply dropped , as it was responsible for the majority of US growth as a non - OPEC producer .
Analysts at Wood Mackenzie , Duke Energy and Goehring & Company have said that productivity and growth in the Permian have both slowed in recent years , and warned of a continuing trend . Among the reasons cited for the decline were a dwindling inventory of high - quality drilling locations , frac hits and daughter - daughter well interference . They said global oil prices in the coming years could be affected if Permian supply dropped , as it was responsible for the majority of US growth as a non - OPEC producer .