I believe that because we are talking about quantum effect energy, then it is a case of any form of measuring would effect it. That is to say any attempt to extract (which could be deemed a form of measuring/observing) any energy from it would be at the expense of the source. Can think of it as quantum friction if that helps. Perhaps a betetr way to explain it would be a atom, which has the classic solarsystem effect with orbiting electrons. Now we have managed to tap into that energy and that is the atomic bomb and later nucleur power stations. Now you know in those cases the original source of material/energy is changed and that is it in a nutshell, by measuring/observing/tapping into that level of energy will effect it and in a way introduces friction into a frictionless state of energy.