Blue and Green: A study from independent research consortium Researching Fracking in Europe (ReFINE) has found that data looking at the risks of leaking shale gas wells is sparse. It says current numbers show huge disparity in the safety of such wells.
The study, published in Marine and Petroleum Geology, found that previous research of oil and gas wells that were drilled over the last 100 years reveal highly variable well barrier and well integrity failure rates, ranging from 1.9% to 75%.
The researchers...