First no offshore drilling, and now discourage any drilling at all

From TheOilDrum, an energy site.

Now changes to the tax law which would make it more expensive for oil and gas companies to operate are being proposed by the Obama administration.

What is the likely outcome? I fear it is an even steeper drop in US produced oil and gas supplies than would otherwise be the case. This drop will come primarily because of the likely impact on small oil and gas companies that dominate the US production market, especially for natural gas.