Abstract: In order to meet the needs for staged fracturing in horizontal open hole in low-permeability Sulige gas field, long expansive rubber sleeve packer for open hole fracturing was developed independently to isolate the open hole section in stages in the operations. According to actual situations at the wellsite, the related designs as basic expansion structure, hydraulic valve assembly and molding process are adopted, so that the packer is able to adapt to different well sizes and resist to high temperature and pressure. The open hole staged fracturing pipe string is composed of the packer, hanger, dropping sliding sleeve, differential pressure sliding sleeve and other downhole tools, and it has been used for 11 wells in Sulige gas field, with the success rate of 100%, which can meet the needs forstaged fracturing in horizontal hole sections in this block, and provide the strong technical support for wide application of the staged fracturing techniques in horizontal wells.

摘要： 针对水平井裸眼分段压裂在苏里格低渗透气田的应用, 自主研制了扩张式长胶筒裸眼压裂封隔器, 用于 解决工艺施工中的裸眼分段封隔问题。依据现场实际情况, 采用了扩张式基本结构, 液压组合控制阀系等针对性设计 及成型工艺, 有效提高其井径适应性与高温承压可靠性。该封隔器与悬挂器、投球滑套、压差滑套等井下工具组合而 成的裸眼分层段工艺管柱在苏里格气田现场应用11 井次, 施工成功率100%, 可满足该区块水平井裸眼分段压裂工艺 需要, 为水平井裸眼分段压裂工艺顺利推广提供了有力的技术支撑。

关键词: 水平井, 分段压裂, 裸眼封隔器, 苏里格气田, 工艺管柱