Numerical simulation of gas production potential from permafrost hydrate deposits by huff and puff method in a single horizontal well in Qilian Mountain, Qinghai province

► We investigate gas production of hydrate in Qilian Mountain with huff & puff method. ► A single horizontal well is used. ► Gas/water production, gas-to-water ratio, and energy efficiency are evaluated. ► Sensitivities of parameters of effect on gas production performance are analyzed.