Sustained, daily production rates of shale gas in the United States are low, about 1.4 to 7.0 E3m3/day (about 50 to 250 Mcf/day) compared to conventional reservoirs. For example, in 2002, the average conventional production rate for new wells in Alberta was 9.3 E3m3/day (330 Mcf/day).
Although the daily gas rate is low, shale gas reservoirs have
The original gas-in-place for a shale gas reservoir is determined by a number of factors, including the
The longest producing shale gas wells have been producing for 75 to 80 years. They are from the Big Sandy pool, a Devonian black shale in Kentucky.
The Antrim shale in the U.S. is about 75,000 km2 wide (29,000 square miles).
The total recoverable gas in a shale gas reservoir is determined by a number of factors, including the
Along with methane gas, other gases* and even heavy liquids may exist in the reservoir, such as
* We are uncertain if hydrogen sulphide (H2S) occurs in Alberta shales.
Technology drives the exploration and production of shale gas because advanced and innovative technologies are needed to access these low-permeability reservoirs.