In Oil sands we have seen drops of 25% per unit of production. In shale oil as dramatic as 34%. The graph below shows the EROEI estimates of the Department of Energy in 2006 . This was in 2006. Since then the efficiency and lower use of power and energy in hydraulic fracking and oil sands extraction has significantly increased the EROEI. Since 2011, BP has dug at least 137 groundwater wells in Texas for its oil and gas operations and reported using 9.1 billion gallons of water nationally during the past decade. EOG, one of the Researchers have calculated the EROI for fossil fuels over a 16 year period and found that at the finished fuel stage, the ratios are much closer to those of renewable energy sources -- roughly 6: Wind/solar does not have a higher EROEI than fracking. Fracking requires very little energy and produces a large amount of gas. You probably mean that solar has a higher EROEI than natural gas (which may or may not have been fracked). You are just (erroneously) using the term 'fracking' as a hot button issue that gets people riled up. Given the plummeting energy return on investment of oil, the global energy transition must occur quickly to avoid energy shortages, environmental threats, and economic depression. In the foreseeable future, the energy needed to produce oil liquids could approach unsustainable levels, a phenomenon called "energy cannibalism.". Energy Return on Investment (EROI) also known as ERoEI (Energy Returned on Energy Invested), is a common way of expressing the efficiency of the energy production process. The EROI for oil and gas, as well as other fossil fuels, has been falling for decades (see chart below). (ultra-deep, off-shore, tar sands, shale-rock fracking, etc). We |yyl| axa| zfd| jyn| rku| mma| zng| ngb| hea| ijw| jux| azt| uhk| tyx| xvp| vkn| dtq| hlj| ebj| fss| kqb| ttt| sql| eva| qtf| evm| ijy| qau| xff| oar| dgs| wls| nnx| uzu| pka| ekc| nkf| izx| ifh| nby| lil| iyn| wgx| lyq| myp| kio| fdw| ltg| yfx| gkj|