ing companies began fracking rock by pumping pressurized water into it.
Approximately one million American wells have been fracked since the 1940s. Most of these are vertical wells that tap into porous sandstone or limestone. Since the 1990s, however, gas companies have been able to harvest the gas still stuck in the original shale source. Fracking shale is accomplished by drilling horizontal wells that extend from their vertical well shafts along thin, horizontal shale layers.
This horizontal drilling has enabled engineers to inject millions of gallons of high-pressure water directly into layers of shale to create the fractures that release the gas. Chemicals added to the water dissolve minerals, kill bacteria that might plug up the well, and insert sand to prop open the fractures.
Most opponents of fracking focus on potential local environmental consequences. Some of these are specific to the new fracking technology, while others apply more generally to natural gas extraction.
The fracking cocktail includes acids, detergents and poisons that are not regulated by federal laws but can be problematic if they seep into drinking water. Fracking since the 1990s has used greater volumes of cocktail-laden water, injected at higher pressures. Methane gas can escape into the environment out of any gas well, creating the real though remote possibility of dangerous explosions. Water from all gas wells often returns to the surface containing extremely low but measurable concentrations of radioactive elements and huge concentrations of salt. This brine can be detrimental if not disposed of properly. Injection of brine into deep wells for disposal has in rare cases triggered small earthquakes.
In addition to these local effects, natural gas extraction has global environmental consequences, because the methane gas that is accessed through extraction and the carbon dioxide released during methane burning are both greenhouse gases that contribute to global climate change. New fracking technologies allow for the extraction of more gas, thus contributing more to climate change than previous natural gas extraction.
So, should the United States and Europe encourage fracking or ban it? Short-run economic interests support fracking.
It appears that the geopolitical interests to avoid dependency on Oil and Gas import especially from Russia pushes towards fracking
Approximately one million American wells have been fracked since the 1940s. Most of these are vertical wells that tap into porous sandstone or limestone. Since the 1990s, however, gas companies have been able to harvest the gas still stuck in the original shale source. Fracking shale is accomplished by drilling horizontal wells that extend from their vertical well shafts along thin, horizontal shale layers.
This horizontal drilling has enabled engineers to inject millions of gallons of high-pressure water directly into layers of shale to create the fractures that release the gas. Chemicals added to the water dissolve minerals, kill bacteria that might plug up the well, and insert sand to prop open the fractures.
Most opponents of fracking focus on potential local environmental consequences. Some of these are specific to the new fracking technology, while others apply more generally to natural gas extraction.
The fracking cocktail includes acids, detergents and poisons that are not regulated by federal laws but can be problematic if they seep into drinking water. Fracking since the 1990s has used greater volumes of cocktail-laden water, injected at higher pressures. Methane gas can escape into the environment out of any gas well, creating the real though remote possibility of dangerous explosions. Water from all gas wells often returns to the surface containing extremely low but measurable concentrations of radioactive elements and huge concentrations of salt. This brine can be detrimental if not disposed of properly. Injection of brine into deep wells for disposal has in rare cases triggered small earthquakes.
In addition to these local effects, natural gas extraction has global environmental consequences, because the methane gas that is accessed through extraction and the carbon dioxide released during methane burning are both greenhouse gases that contribute to global climate change. New fracking technologies allow for the extraction of more gas, thus contributing more to climate change than previous natural gas extraction.
So, should the United States and Europe encourage fracking or ban it? Short-run economic interests support fracking.
It appears that the geopolitical interests to avoid dependency on Oil and Gas import especially from Russia pushes towards fracking
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