The invention relates to a low-permeability reservoir
natural gas hydrate exploitation fracturing and sand prevention combined operation process method. The process method comprises the steps of hydraulic
sand blasting perforation and fracturing string
tripping-in, forward washing, lower-layer hydraulic
sand blasting perforation primary fracturing, lower-layer sand prevention medium main fracturing, sand prevention medium filling operation, upper-layer hydraulic
sand blasting perforation, fracturing, sand washing operation and the like. According to the process method, a hydraulic jetting toolis used, one or more jetting hole channels are formed in a reservoir through the
water hammer effect, micro-cracks are generated in a near-
wellbore zone, then the micro-cracks are pressed open and extend through the end sand removal fracturing technology, meanwhile, a sand prevention medium is used for filling the micro-cracks, end sand removal is achieved, and a plurality of short and wide high-flow-
conductivity fracture zones are formed in a low-permeability reservoir; and effective transformation yield increase and sand prevention of the lower layer are guaranteed, multi-section dragging fracturing of a horizontal well of the argillaceous low-permeability reservoir can be implemented, reservoir transformation with high heterogeneity and large
physical property difference is achieved, seepage conditions are improved, and the purpose of combining yield increase and sand control is achieved.