Single-layer multi-seam fracturing technology based on stereoscopic staggered oriented perforating technology

The invention discloses a single-layer multi-seam fracturing technology based on a stereoscopic staggered oriented perforating technology, and belongs to the field of oil extraction in low-permeability oilfields. The fracturing technology at least includes the following steps: (1), shaft optimization; (2) optimization of perforation parameters; (3) optimization of oriented perforating manner and construction scale; (4), fracturing construction. According to the invention, the perforation parameters are optimized to guarantee that a single sand body with the reservoir thickness of 30 m is divided into more than four sections after fracturing of separate layers; the stereoscopic staggered oriented perforating construction manner enables the orientations of perforations on adjacent two sections to be different, crack initiation and expansion of cracks at each section are at different orientations, communication of cracks is avoided, construction scale such as sand quantity, discharge and liquid quantity, and fracture scale are improved, and the reservoir reformation volume is increased, so that the discharge volume is enlarged, and well yield is increased; more than four layers of immovable string tools for fracturing of separate layers are adopted for construction, so that fracture of more than four sections can be completed by the pipe column in one trip, and the construction efficiency is improved.