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.

摘要： 低渗透油藏分层压裂施工要求分层压裂工具承高压、耐高温、防砂卡。防砂卡封隔器设有防砂卡机构、 脱开结构、反洗井通道, 采用双层钢丝编织和滑动密封机构, 进一步增强了承压性能, 高压试验中性能稳定。分层压 裂管柱配备联动滑套及防砂卡封隔器, 可以实现不动管柱逐级坐封、分级解封、双封单卡, 砂卡后可逐级脱开、逐级 打捞。现场应用表明, 防砂卡封隔器分层压裂工具提高了分层压裂工具的适应性、针对性和安全性, 可有效满足低渗 透油藏多段分层压裂需求。

关键词: 低渗透油藏, 分层压裂, 封隔器, 防砂卡, 双联动滑套