Drillers extracted 793 billion cubic feet of gas, compared with 432.5 billion cubic feet in the first half of 2011 and 630 billion cubic feet in the second half.
The Marcellus Shale accounts for almost all of Pennsylvania's deep-well natural gas production, though a small amount of production has come online from the Utica and other formations, DEP spokesman Kevin Sunday said.
DEP last week reported a figure of 704 billion cubic feet for the first half of this year, but that number omitted major driller Chesapeake Energy. Chesapeake said it filed its report on time, but DEP said the report contained too many errors to be processed correctly. DEP incurred criticism for not clearly indicating that last week's data was incomplete.
Here is the information:
Deep-well natural gas production in Pennsylvania
|Time period||Natural gas production (in cubic feet)|
|January-June 2011||432.5 billion|
|July-December 2011||630 billion|
|January-June 2012||793 billion|