关键词: 低渗透油藏, 分层压裂, 封隔器, 防砂卡, 双联动滑套

Abstract: Layered fracturing in low permeability reservoirs needs the fracturing tools bearing high pressure, high temperature and preventing sand from sloughing. The newly developed sand control packer includes a sand control device, a disengage device and a passage for reverse well flushing. By using bilayer steel wire woven and sliding sealed components, its pressure-bearing capacity is enhanced and obtained stable performance in high pressure test. Layered fracturing pipe string that equipped with linkage sliding sleeve and sand control packer can permit stage-by-stage packing, separate-stage removal and double sealing with single clamp. The string can be disconnected and perform fishing jobs stage by stage after sand sticking. Field application shows that multi-layer fracturing tool-sand control packer improved the adaptability, pertinency and safety of layer fracturing tool, so that it can effectively meet the needs for multi-layer fracturing in low permeability reservoirs.