The U.S. Energy Information Administration (EIA) reported an injection of 77 Bcf natural gas into storage for the week ended Sept. 9. The result came in above median estimates and added pressure to already slumping Nymex natural gas futures.

The build kept inventories below average levels, but analysts on the online energy platform Enelyst said it reflected mounting production levels that could help narrow deficits as the market moves into shoulder season.

Production early this month reached record levels above 100 Bcf/d, according to Bloomberg estimates, and output continues to hold near that level this week.

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