SLICK WATER VOLUMETRIC FRACTURING METHOD WITH LARGE LIQUID VOLUME, HIGH FLOW RATE, LARGE PREFLUSH AND LOW SAND RATIO

摘要

Disclosed is slick water volumetric fracturing method with large liquid volume, high flow rate, large preflush and low sand ratio, including the following steps: (a) evaluating the reservoir parameters; (b) determining the perforation position and a perforation parameters of a fracturing interval; (c) determining the fracturing parameters; (d) performing a perforation operation on the fracturing interval; (e) injecting acidizing fluids into the perforation; (f) alternately injecting preflush and sand-laden fluids into the fracturing interval several times; (g) injecting displacement fluids into the fracturing interval; wherein the flow rate is not less than 12 m³/min. The beneficial effect of the technical scheme proposed in the present invention is: by using a low viscosity slick water fracturing fluid with high flow rate, the pressure of the fracturing fluid is increased, thereby increasing the stimulated reservoir volume and increasing the fracturing yield.