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Natural Gas Drilling

Beyond Fracking: Experts Challenge Safety of Exploratory Wells, Vertical Drilling

written by Walter Wang

For more than two years, the natural gas drilling debate has focused primarily on the use of hydraulic fracturing in horizontal wells. But expert testimony submitted for a government hearing next month challenges long-held assumptions about the safety of deep vertical drilling and exploratory wells, which operate in many states with limited regulatory oversight.

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December 8, 2010 0 comment
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Congress Launches Investigation Into Gas Drilling Practices

written by Walter Wang

Two of the largest companies involved in natural gas drilling have acknowledged pumping hundreds of thousands of gallons of diesel-based fluids into the ground in the process of hydraulic fracturing, raising further concerns that existing state and federal regulations don’t adequately protect drinking water from drilling.

Rep. Henry A. Waxman, D-Calif., who released the information in a statement Thursday, announced that the House Committee on Energy and Commerce, which he chairs, is launching an investigation into potential environmental impacts from hydraulic fracturing.

The process, which forces highly pressurized water, sand and chemicals into rock to release the gas and oil locked inside, gives drillers unprecedented access to deeply buried gas deposits and vastly increases the country’s known energy reserves. But as ProPublica has detailed in more than 60 articles, the process comes with risks. The fluids used in hydraulic fracturing are laced with chemicals — some of which are known carcinogens. And because the process is exempt from most federal oversight, it is overseen by state agencies that are spread thin and have widely varying regulations.

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February 20, 2010 0 comment
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Natural Gas Drilling: What We Don’t Know

written by Walter Wang

It takes brute force to wrest natural gas from the earth. Millions of gallons of chemical-laden water mixed with sand — under enough pressure to peel paint from a car — are pumped into the ground, pulverizing a layer of rock that holds billions of small bubbles of gas.

The chemicals transform the fluid into a frictionless mass that works its way deep into the earth, prying open tiny cracks that can extend thousands of feet. The particles of sand or silicon wedge inside those cracks, holding the earth open just enough to allow the gas to slip by.

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January 13, 2010 2 comments
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