He does not believe that the technique can predict flow rates, even from rock that contains a lot of hydrocarbons-and flow rates are crucial to an oil field's economics.
Concerns have been raised in many countries about the safety of fracking, a technique in which high-pressure fluids are pumped into shale to fracture the rock and force out natural gas.
In this tutorial paper the method of invesigating three-dimension velocity structure of rock sample by AE technique and the computerized tomography are described.