摘要
针对油气勘探过程中,多组分碳同位素光谱仪在钻井现场复杂温度环境下存在激光波长漂移和测量精度下降的问题,开发了一种基于三级温控策略的高精度温控系统。该系统由外层隔热箱、中层恒温舱与核心激光器温控单元3部分构成,通过逐级热阻隔减缓环境干扰。系统集成测试与现场实测表明:在恒温25℃实验室条件下,激光器温度稳定于37.7±0.005℃,对应波长漂移小于0.002 nm;在3~38℃的野外条件下连续运行72 h,系统稳态控温误差优于±0.01℃,使CH4 δ13C1测量误差减小至±0.5‰以内,显著提高了光谱仪测量稳定性与分辨率,为油气成因分析与储层评价提供了关键技术支撑。
In the process of oil and gas exploration,multi-component carbon isotope spectrometers are prone to laser wavelength drift and decreased measurement accuracy under the complex temperature conditions of drilling sites.To address this issue,a high precision temperature control system based on a three-stage temperature control strategy has been developed.The system consists of three parts:an outer insulation box,a middle constant-temperature chamber,and a core laser temperature control unit.By implementing progressive thermal resistance,environmental interference is mitigated.The system integration tests and field measurements demonstrate that under laboratory conditions at a constant temperature of 25 C,the laser temperature stabilizes at 37.7±0.005℃,with a corresponding wavelength drift of less than 0.002 nm.Under field conditions with temperatures ranging from 3 to 38℃,the system operates continuously for 72 h with a steady-state temperature control error better than±0.01℃.This improves the measurement deviation of CH_(4)δ13C_(1) to±0.5%o,significantly enhancing the stability and resolution of the spectrometer.The system provides key technical support for oil and gas origin analysis and reservoir evaluation.
作者
李攀攀
张宏悦
蒋荻南
计金权
董航
LI Panpan;ZHANG Hongyue;JIANG Dinan;JI Jinquan;DONG Hang(Oilfield Technology Division(Oilfield Technology Research Institute),China Oilfield Services Limited,Langfang,Hebei 065200,China)
出处
《录井工程》
2025年第4期44-48,共5页
Mud Logging Engineering
关键词
碳同位素光谱仪
温控系统
三级恒温
PID控制
激光波长
油气勘探
carbon isotope spectrometer
temperature control system
three-stage constant temperature
PID control
laser wavelength
oil and gas exploration
