Environmental Engineering Reference
In-Depth Information
Figure 1 Limits of US shale gas production.
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be considered. Carboniferous shales, in general, and Namurian shales, in
particular, were found to be ideally suited, both in terms of maturity and in
degree of natural fracturing (see Figure 2). During the late 1970s, profit made
from gas extraction was subject to both Corporation Tax and Petroleum
Revenue Tax, meaning that production was nowhere near economic.
The conclusions of the Imperial College study on shale gas potential in the
UK were presented to the UK Department of Energy in 1985. They were met
