Abstract:  Presently, shale gas reservoir is mainly developed with the technology of horizontal well completion and bridge plug staged hydraulic sand fracturing. In flow back at the stage of/after sand fracturing, sands may come out in large volume under three conditions: emergency bleed-off in case of screening out during fracturing, flow-backs during plug milling and after fracturing. Solid particles and sands coming out from wellbore may plug wellbore and surface pipe, erode equipment and pipe, and seriously influence flow-back continuity and safety. In this Paper, characteristics and difficulties in shale gas well flowback are analyzed systematically, and surface flowback & well test system is optimized, a series of surface flowback and sand removal equipment are developed, relevant research on sand removal during flow back is conducted, and finally a whole set of surface sand removal technology and equipment with cyclone desander/sand filter as the core equipment are developed, which have been applied in the sand removal jobs of a lot of shale gas wells with good and satisfactory results.

Key words:  , shale gas, de-sander, flow back, Weiyuan block, de-sanding effects

摘要：  页岩气藏目前主要采用水平井完井和桥塞分层大型水力加砂压裂的工艺进行开发，压裂砂堵泄压、 压裂后排液和钻磨桥塞过程中均存在大量出砂工况，高压流体携带固相颗粒及砂粒，堵塞地面流程或井筒，造成设 备管线冲蚀，严重影响排液的连续性和安全性。文章在系统分析页岩气井返排自身特点和存在的主要技术难点的 基础上，优化页岩气井地面返排测试流程设计，研发配套了一系列地面返排除砂装备，并开展相关的工艺技术研 究，最终形成一套以除砂器为中心的针对页岩气井的地面除砂技术与配套装备，运用该技术圆满的完成了多口页 岩气井的地面除砂作业，效果显著。

关键词:  页岩气, 除砂器, 返排, 威远区块, 除砂效率