Hydraulic Fracturing Technologies and Their Development Trend

In this paper,a research on refracturing,multiple thin-layer fracturing and multiple-crack fracturing at home and abroad is presented;moreover,3 new fracturing fluids,6 new proppants and 4 new fracturing technologies including water-fracturing,floating proppant fracturing,fracturing of end sand out and fracture height control,hydrojet fracturing layer by layer are also illustrated.It's necessary to improve conventional fracturing technologies and to integrate reservoir,fluid,proppant and the technologies in order to increase productivity and recovery for oil and gas wells.Suggestions on the proppant with ultra-low density and high strength as well as the sand fracturing of ultra-deep and horizontal wells are also proposed.