Shale gas is stored in the shale, and exists in the form of adsorbed and free state. Shale gas is becoming the hot spot of the oil and gas explorations. Geophysical logging technology has high vertical resolution and sensitivity, and is able to provide continuous petrophysical information along the borehole; therefore it is an indispensable means for the reservoir evaluation of shale gas. The geological characteristics and logging response characteristics of shale gas reservoirs are summarized, and identification methods of shale layers and shale reservoirs containing gas by well logging technology at home and abroad are discussed. In recognition of shale layers, the well logging method and cross plot method are introduced. In recognition of shale reservoirs, gas surveying method, conventional well logging combination method, ΔlogR method, and dielectric constant method are presented. According to the research, it is pointed out that combination well logging method and cross plot method could identify shale layers well, and gas surveying method, conventional well logging combination method, ΔlogR method, and dielectric constant method are able to obtain the good performance for identifying containing gas shale reservoirs. Shale gas reservoir logging evaluation research could provide the technical support for Chinese shale gas exploration and development. China should strengthen the research on shale gas reservoir logging evaluation technique and establish the suitable logging evaluation technology for China's deep shale reservoirs, which could reduce the risk of the shale gas exploration and development.