DEVELOPMENT OF CH4-CO2 OPTICAL FIBER GAS SENSOR MONITORING INSTRUMENT FOR NATURAL GAS HYDRATE PRODUCTION WELL
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摘要:
天然气水合物资源开发备受关注,日本、中国等国家相继实施海域天然气水合物试采,证实了其资源潜力和开发可行性。目前对水合物开采过程中生产井内气体成分的监测手段尚不完善,制约了对生产过程监控及安全风险预估等工作的开展。本研究基于可调谐半导体激光吸收光谱(TDLAS)原理,设计出一套CH4、CO2气体成分传感监测系统,并针对天然气水合物生产井工况进行小型化、抗干扰改良,最终形成设备样机。经测试验证,研制的光纤气体传感监测仪器具备对浓度>50×10-6的CH4、浓度>100×10-6的CO2稳定的测量能力。
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关键词:
- 天然气水合物 /
- 光纤气体传感器 /
- 可调谐半导体激光吸收光谱 /
- 甲烷 /
- 二氧化碳
Abstract:The development of natural gas hydrate has attracted great attention from all over the world. Japan, China and some other countries have successfully implemented the trial production at sea, which further confirmed the resource potential and development feasibility of gas hydrate. However, the monitoring methods for gas composition in production well are far from perfect up to date, which restricts the production process evaluation and risk prediction. Based on the principles of TDLAS, a set of gas composition sensing and monitoring system for methane and carbon dioxide is designed, and the miniaturization and anti-interference improvement are realized according to the gas hydrate production well conditions. It is verified that the developed optical fiber gas composition monitoring instrument is effective and stable for measurement of CH4 with concentration above 50×10−6 and CO2 with concentration above 100×10−6.
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