基于数字孪生系统的可视化缝隙评价仪及堵漏工作液研究

Research on visual fracture evaluation instrument based on digital twin system and plugging fluid

摘要:

针对现有堵漏评价仪器存在人工操作繁琐、数据稳定性差、安全性不足及现场堵漏成功率低等问题，研制了一套基于数字孪生系统的可视化缝隙评价仪，并开发了宽温带滤失型复合结构塞体堵漏工作液。该评价仪融合三维可视化控制界面、物理感知跟踪体系及实验管理平台，数据采集精度达±0.5%FS，传输速率1~5 Mbps，系统稳定性>99.5%，最高承压5 MPa，可模拟1~5 mm裂缝，实现远程操作与堵漏过程可视化观测，大幅提升实验安全性。依托该仪器研发了宽温带滤失型复合结构塞体堵漏工作液，优化主剂与悬浮剂加量，形成适配不同裂缝宽度的堵漏配方。实验表明，工作液可有效封堵1~3 mm裂缝，固化强度≥8 MPa，可钻性级别2~3级。现场应用24口井，一次堵漏成功率87.5%，施工后循环恢复正常且无漏失现象。研究结果表明，该仪器与工作液显著提升了堵漏评价的安全性与效率，为裂缝性漏失的高效治理提供了智能化解决方案。

Abstract:

To address the problems of existing plugging evaluation instruments， such as cumbersome manual operation， poor data stability， insufficient safety， and low field plugging success rate， a visualized fracture evaluation instrument based on a digital twin system was developed， along with a wide-temperature range filtration-type composite structure plugging fluid. The instrument integrates a 3D visualization control interface， a physical perception tracking system， and an experimental management platform. It achieves a data acquisition accuracy of ±0.5%FS， a transmission rate of 1~5 Mbps， a system stability of >99.5%， and a maximum pressure capacity of 5 MPa. Capable of simulating 1~5 mm fractures， it enables remote operation and visual observation of the plugging process， thereby significantly improving experimental safety. Based on this instrument， the wide-temperature range filtration-type composite structure plugging fluid was developed； by optimizing the dosages of the main agent and suspending agent， plugging formulations adaptable to different fracture widths were formulated. Experimental results show that the plugging fluid can effectively seal 1~3 mm fractures， with a consolidated strength of ≥8 MPa and a drillability grade of 2~3. Field applications in 24 wells demonstrate a one-time plugging success rate of 87.5%， with normal circulation restored and no leakage after operations. The results indicate that the instrument and plugging fluid significantly enhance the safety and efficiency of plugging evaluation， providing an intelligent solution for the effective treatment of fractured loss zones.