关键词: 泄漏检测与修复, 高含硫气田, 数据采集系统, 风险评估

Abstract: This paper introduced the application of leak detection and repair (LDAR) technology in a natural gas gathering, transportation and purification device for a high-sulfur gas field. The LDAR technology was implemented by comprehensively filing and testing different blocks, different types of sealing points and different media of the device, and the LDAR data acquisition system was applied to on-line management. As a result, 51,308 sealing points file information were established, and 35 sealing points with leakage were found during the detection. The overall leakage rate was 0.068% and 35 leakage points have been repaired by LDAR. The repair rate was 100%. Through calculation, the total emission reduction of hydrogen sulfide and fuel gas amounted to 0.01678 and 0.31701 tons per year respectively after the repair, and the emission reduction rate was 100%. Comparing the safety risk value of the device before and after the leakage point repair, it can be seen that the risk value was generally reduced. The application of LDAR technology to high-sulfur gas fields reduced the risk of hydrogen sulfide and fuel gas leakage effectively, and the application scope of LDAR technology was expanded, which provided judgment basis for early warning of leakage detection in high-sulfur gas fields

Key words: leak detection and repair/LDAR, high-sulfur gas field, data acquisition system, risk assessment