Shale gas resources are abundantly distributed with low porosity and permeability. Horizontal well and fracturingare prior considerations. Fracturing is a widely-used technology to enhance gas production. In this paper, the author(a) investigated the present stimulation of Barnett and Haynesvile gas fields (Fig. 1) in America, Sichuan basin (Fig. 2) inChina and Cooper basin (Fig. 3) in Australia; (b) compared different characteristics and limitations of multi-stage fracturing,water-fracturing, simultaneous fracturing, net fracturing, refracturing and hydraulic jet fracturing; (c) analyzed thecritical point of the shale fracturing; (d) offered solutions to the fracturing fluid manufacture, selection and improvementof the fracturing fluids, fractures extension, equipments, fracturing effect evaluation and reservoir protection. It has a farreachingsignificance to improve fracturing and stimulation of shale gas reservoirs, in view of the high risk, low successratio and poor stimulation effect the shale gas exploration would face.
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