HGEF, an oil/gas well stimulation technology by means of powder and/or propellant in well to create multiple radial fracture system in the vicinity of weelbore and hence to increase the well production, has been widely tested both home and abroad and shown a bright prospect in oil and gas industry. This paper deals with some foundamental aspects of HEGF, including technology base, key factor of HEGF, influence of HEGF on casing and cement, flow regime of the multiple radial fracture system and the relationship between charging and pressurization. Based on the results of our researches and field applications, we hope that more attention should be paid to this stimulation technology.

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