The effect of the parameters reflecting formation energy as the ground stress, formation pressure, the water abundance of coal bed and the elastic energy of water body, etc.
The critical thickness is determined from the zero formation energy of a misfit dislocation. i. e. the amount of reduced mismatch strain energy equaling the amount of creased dislocation self energy.
The formation energy and electronic structures of the series-connected C60 molecule are calculated by the ab initio density–functional theory.
Finally it concludes that the best guarantee for high production of gas well is preventing reservoir pollution, effective innovation and reasonable use of formation energy.
